Climate and average weather in Birgañj
In Birgañj, the summers are humid, sweltering, showery, and mostly clear and the winters are warm and clear.
Over the course of the year, the temperature in Birgañj typically varies from 10°C to 37°C, and is rarely below 7°C or above 41°C. May is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Birgañj for warm-weather activities is from mid November to late February.
- Hottest
- May
- 37°
- Coldest
- Jan
- 10°
- Wettest
- Jul
- 442 mm
- Driest
- Nov
- 5 mm
- Rain / yr
- 1438 mm
- 129 wet days
- Daylight
- 10.3–13.7 h
- shortest–longest
- Elevation
- 89 m
- 27.0°N
- Clearest
- Nov
- 16% cloud
Birgañj is Metropolitan city in Parsa District, Madhesh Province, Nepal.
- Density
- 3,566/km²
- people per km²
- Founded
- 1897
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Birgañj weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around mid November to late February.
Temperature through the year
Daily average highs and lows in Birgañj, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 3.3 months, from March 21 to June 29, with daily high temperatures above 33°C. The hottest month of the year in Birgañj is May, with an average high of 37°C and low of 26°C.
The cool season lasts 1.9 months, from December 12 to February 6, with daily high temperatures below 25°C. The coldest month of the year in Birgañj is January, with an average low of 10°C and high of 23°C.
Days typically run about 11°C warmer than nights, with the widest day–night swing (around 15°C) in March.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 26 | 32 | 37 | 37 | 35 | 33 | 32 | 32 | 31 | 29 | 24 |
| Avg low (°C) | 10 | 13 | 17 | 23 | 26 | 27 | 27 | 27 | 26 | 22 | 16 | 12 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 23 | 10 |
| Feb | 26 | 13 |
| Mar | 32 | 17 |
| Apr | 37 | 23 |
| May | 37 | 26 |
| Jun | 35 | 27 |
| Jul | 33 | 27 |
| Aug | 32 | 27 |
| Sep | 32 | 26 |
| Oct | 31 | 22 |
| Nov | 29 | 16 |
| Dec | 24 | 12 |
How hot and cold Birgañj really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the hottest afternoons, once humidity is folded in, Birgañj feels like about 43°C (around June 15). About 227 days a year carry some heat stress, and 147 of them tip into dangerous heat (feels-like above 39°C), peaking in June.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 22 | 26 | 32 | 37 | 40 | 43 | 41 | 41 | 40 | 35 | 29 | 24 |
| Air high (°C) | 23 | 26 | 32 | 37 | 37 | 35 | 33 | 32 | 32 | 31 | 29 | 24 |
| Feels-like low (°C) | 10 | 13 | 17 | 23 | 26 | 27 | 27 | 27 | 25 | 21 | 16 | 11 |
| Air low (°C) | 10 | 13 | 17 | 23 | 26 | 27 | 27 | 27 | 26 | 22 | 16 | 12 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 22 | 23 | 10 | 10 |
| Feb | 26 | 26 | 13 | 13 |
| Mar | 32 | 32 | 17 | 17 |
| Apr | 37 | 37 | 23 | 23 |
| May | 40 | 37 | 26 | 26 |
| Jun | 43 | 35 | 27 | 27 |
| Jul | 41 | 33 | 27 | 27 |
| Aug | 41 | 32 | 27 | 27 |
| Sep | 40 | 32 | 25 | 26 |
| Oct | 35 | 31 | 21 | 22 |
| Nov | 29 | 29 | 16 | 16 |
| Dec | 24 | 24 | 11 | 12 |
Average hourly temperature in Birgañj
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on May afternoons, near 37°C, and coldest before dawn in January, near 10°C.
Birgañj weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 23° / 10° | 13 | 1.8 | 10.5 | 8.7 |
| Feb | 26° / 13° | 17 | 2.1 | 11 | 8.4 |
| Mar | 32° / 17° | 12 | 2.1 | 11.8 | 5.0 |
| Apr | 37° / 23° | 26 | 5.2 | 12.6 | 2.1 |
| May | 37° / 26° | 76 | 11.5 | 13.3 | 1.7 |
| Jun | 35° / 27° | 225 | 20.5 | 13.7 | 1.9 |
| Jul | 33° / 27° | 442 | 28.6 | 13.5 | 2.1 |
| Aug | 32° / 27° | 347 | 28.2 | 13 | 2.2 |
| Sep | 32° / 26° | 225 | 22.7 | 12.2 | 2.8 |
| Oct | 31° / 22° | 45 | 5 | 11.4 | 5.2 |
| Nov | 29° / 16° | 5 | 0.4 | 10.7 | 7.7 |
| Dec | 24° / 12° | 7 | 0.6 | 10.3 | 9.1 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Birgañj gets about 1438 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.
The wetter season lasts 4.7 months, from around May 15 to Oct 5, peaking in July at about 94% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Nov 26.
July is the wettest month by volume, with 442 mm over about 29 wet days; November is the driest, with 5 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 6 | 7 | 7 | 18 | 37 | 69 | 92 | 90 | 74 | 18 | 2 | 2 |
| Rain days | 2 | 2 | 2 | 5 | 12 | 21 | 29 | 28 | 23 | 5 | 0 | 1 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 6 | 2 |
| Feb | 7 | 2 |
| Mar | 7 | 2 |
| Apr | 18 | 5 |
| May | 37 | 12 |
| Jun | 69 | 21 |
| Jul | 92 | 29 |
| Aug | 90 | 28 |
| Sep | 74 | 23 |
| Oct | 18 | 5 |
| Nov | 2 | 0 |
| Dec | 2 | 1 |
Monthly rainfall
Over a full year, Birgañj collects about 1438 mm of rain across 129 wet days — roughly 120 mm in an average month.
It doesn’t fall evenly. July is the wettest month with 442 mm, while November is the driest at just 5 mm. The three wettest months alone bring about 70% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 13 | 17 | 12 | 26 | 76 | 225 | 442 | 347 | 225 | 45 | 5 | 7 |
| Rain days | 2 | 2 | 2 | 5 | 12 | 21 | 29 | 28 | 23 | 5 | 0 | 1 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 13 | 2 |
| Feb | 17 | 2 |
| Mar | 12 | 2 |
| Apr | 26 | 5 |
| May | 76 | 12 |
| Jun | 225 | 21 |
| Jul | 442 | 29 |
| Aug | 347 | 28 |
| Sep | 225 | 23 |
| Oct | 45 | 5 |
| Nov | 5 | 0 |
| Dec | 7 | 1 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Birgañj, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around September 28 and lasts for 8.3 months, ending around June 8. The clearest month is November, when the sky is clear, mostly clear, or partly cloudy 92% of the time on average.
The cloudier part of the year begins around June 9 and lasts for 3.6 months, ending around September 27. The cloudiest month is July, when it is overcast or mostly cloudy 91% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 84 | 84 | 87 | 87 | 86 | 49 | 9 | 10 | 45 | 88 | 92 | 88 |
| Cloudier (%) | 16 | 16 | 13 | 13 | 14 | 51 | 91 | 90 | 55 | 12 | 8 | 12 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 84 | 16 |
| Feb | 84 | 16 |
| Mar | 87 | 13 |
| Apr | 87 | 13 |
| May | 86 | 14 |
| Jun | 49 | 51 |
| Jul | 9 | 91 |
| Aug | 10 | 90 |
| Sep | 45 | 55 |
| Oct | 88 | 12 |
| Nov | 92 | 8 |
| Dec | 88 | 12 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 9, brings about 13 h 42 min of light; the shortest, around January 1, only 10 h 18 min — a swing of roughly 3 h 24 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.5 | 11.0 | 11.8 | 12.6 | 13.3 | 13.7 | 13.5 | 13.0 | 12.2 | 11.4 | 10.7 | 10.3 |
| Sunrise (AM) | 7:01 | 6:49 | 6:21 | 5:47 | 5:22 | 5:15 | 5:25 | 5:41 | 5:55 | 6:10 | 6:31 | 6:52 |
| Sunset (PM) | 5:29 | 5:52 | 6:09 | 6:25 | 6:42 | 6:56 | 6:58 | 6:38 | 6:05 | 5:31 | 5:10 | 5:11 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 10.5 | 7:01 | 5:29 |
| Feb | 11.0 | 6:49 | 5:52 |
| Mar | 11.8 | 6:21 | 6:09 |
| Apr | 12.6 | 5:47 | 6:25 |
| May | 13.3 | 5:22 | 6:42 |
| Jun | 13.7 | 5:15 | 6:56 |
| Jul | 13.5 | 5:25 | 6:58 |
| Aug | 13.0 | 5:41 | 6:38 |
| Sep | 12.2 | 5:55 | 6:05 |
| Oct | 11.4 | 6:10 | 5:31 |
| Nov | 10.7 | 6:31 | 5:10 |
| Dec | 10.3 | 6:52 | 5:11 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Birgañj averages about 17 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 0 and 27 days.
The sunnier stretch runs 8.1 months, from around Sep 30 to Jun 4. The sunniest month is November, with roughly 26 sunny days (brilliant).
The greyest month is July, down near 1 sunny days — about 98% fewer than the November peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 22 | 21 | 23 | 21 | 21 | 10 | 1 | 1 | 9 | 24 | 26 | 25 |
| Sky | Bright | Bright | Bright | Bright | Bright | Mixed | Gloomy | Gloomy | Mixed | Brilliant | Brilliant | Brilliant |
| Sunny days | Sky | |
|---|---|---|
| Jan | 22 | Bright |
| Feb | 21 | Bright |
| Mar | 23 | Bright |
| Apr | 21 | Bright |
| May | 21 | Bright |
| Jun | 10 | Mixed |
| Jul | 1 | Gloomy |
| Aug | 1 | Gloomy |
| Sep | 9 | Mixed |
| Oct | 24 | Brilliant |
| Nov | 26 | Brilliant |
| Dec | 25 | Brilliant |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Birgañj, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 6.7 months, from around April 21 to November 11. The muggiest month is June, when the air feels humid, muggy or worse about 99% of the time.
The most comfortable stretch runs from around November 12 to April 20, and January is the most comfortable month — the air is dry or comfortable 100% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 86 | 59 | 49 | 32 | 4 | 0 | 0 | 0 | 0 | 0 | 13 | 65 |
| Comfortable (%) | 14 | 34 | 33 | 15 | 5 | 1 | 0 | 0 | 0 | 4 | 39 | 31 |
| Humid (%) | 0 | 7 | 14 | 22 | 10 | 1 | 0 | 0 | 0 | 13 | 34 | 4 |
| Muggy (%) | 0 | 0 | 4 | 27 | 30 | 4 | 0 | 0 | 0 | 26 | 13 | 0 |
| Oppressive (%) | 0 | 0 | 0 | 5 | 42 | 23 | 0 | 0 | 9 | 36 | 1 | 0 |
| Miserable (%) | 0 | 0 | 0 | 0 | 9 | 71 | 100 | 100 | 90 | 21 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 86 | 14 | 0 | 0 | 0 | 0 |
| Feb | 59 | 34 | 7 | 0 | 0 | 0 |
| Mar | 49 | 33 | 14 | 4 | 0 | 0 |
| Apr | 32 | 15 | 22 | 27 | 5 | 0 |
| May | 4 | 5 | 10 | 30 | 42 | 9 |
| Jun | 0 | 1 | 1 | 4 | 23 | 71 |
| Jul | 0 | 0 | 0 | 0 | 0 | 100 |
| Aug | 0 | 0 | 0 | 0 | 0 | 100 |
| Sep | 0 | 0 | 0 | 0 | 9 | 90 |
| Oct | 0 | 4 | 13 | 26 | 36 | 21 |
| Nov | 13 | 39 | 34 | 13 | 1 | 0 |
| Dec | 65 | 31 | 4 | 0 | 0 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Birgañj is typically calm, near 7 km/h, and varies little with the seasons.
The windier part of the year lasts 6.5 months, from around Feb 26 to Sep 10. The windiest month is July, averaging about 9 km/h (calm).
The calmer part of the year runs from around Sep 11 to Feb 25, with October the calmest month at about 5 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 7 | 8 | 9 | 9 | 9 | 9 | 8 | 7 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 6 | calm |
| Feb | 7 | calm |
| Mar | 8 | calm |
| Apr | 9 | calm |
| May | 9 | calm |
| Jun | 9 | calm |
| Jul | 9 | calm |
| Aug | 8 | calm |
| Sep | 7 | calm |
| Oct | 5 | calm |
| Nov | 5 | calm |
| Dec | 5 | calm |
Hazard calendar for Birgañj
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Birgañj's monsoon runs June–September, when most of the year's rain falls.
Birgañj sees seasonal dust haze (June), heaviest in June.
Best time to visit Birgañj
To characterize how pleasant the weather is in Birgañj throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid February, Birgañj is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Birgañj for general outdoor tourist activities is from mid November to late February, with a peak score in the third week of December.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 8.7 | 8.3 | 5.0 | 2.2 | 1.7 | 1.9 | 2.1 | 2.1 | 2.9 | 5.2 | 7.6 | 9.1 |
| Rating | ideal | ideal | fair | poor | poor | poor | poor | poor | poor | fair | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 8.7 | ideal |
| Feb | 8.3 | ideal |
| Mar | 5.0 | fair |
| Apr | 2.2 | poor |
| May | 1.7 | poor |
| Jun | 1.9 | poor |
| Jul | 2.1 | poor |
| Aug | 2.1 | poor |
| Sep | 2.9 | poor |
| Oct | 5.2 | fair |
| Nov | 7.6 | ideal |
| Dec | 9.1 | ideal |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best times of year to visit Birgañj for hot-weather activities run from early February to late March and again from mid October to late December, with a peak score in the second week of November.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Birgañj, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around May (highs near 37°C), the essentials are light clothes, rain gear and sun protection. In the cold season around January (highs near 23°C), pack light clothes.
In May, Birgañj sees daytime highs around 37°C and nights near 26°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.
UV index (midday) in Birgañj by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in Birgañj peaks around July 19 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 22 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 4 | 9 | 8 | 8 | 7 | 11 | 9 | 9 | 6 | 4 | 4 |
| Level | Moderate | Moderate | Very high | Very high | Very high | Very high | Extreme | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 4 | Moderate |
| Mar | 9 | Very high |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 7 | Very high |
| Jul | 11 | Extreme |
| Aug | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 4 | Moderate |
Average hourly UV index in Birgañj
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in July the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 3.5 | 3.5 | 7 | 7 | 7.5 | 7.5 | 8.5 | 7.5 | 7 | 5.5 | 3 | 3 |
| UV ≥ 6 (h/day) | 0 | 0 | 4 | 4 | 4 | 4 | 6 | 5 | 4.5 | 0.5 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 3.5 | 0 |
| Feb | 3.5 | 0 |
| Mar | 7 | 4 |
| Apr | 7 | 4 |
| May | 7.5 | 4 |
| Jun | 7.5 | 4 |
| Jul | 8.5 | 6 |
| Aug | 7.5 | 5 |
| Sep | 7 | 4.5 |
| Oct | 5.5 | 0.5 |
| Nov | 3 | 0 |
| Dec | 3 | 0 |
Air quality in Birgañj by month
Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.
Air quality in Birgañj is worst in January — around 257 µg/m³ PM2.5 (very unhealthy), about 4.7× the cleanest month (July, 54 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 257 | 211 | 167 | 124 | 89 | 80 | 54 | 67 | 85 | 146 | 219 | 252 |
| Level | Very unhealthy | Very unhealthy | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Unhealthy | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 257 | Very unhealthy |
| Feb | 211 | Very unhealthy |
| Mar | 167 | Very unhealthy |
| Apr | 124 | Unhealthy |
| May | 89 | Unhealthy |
| Jun | 80 | Unhealthy |
| Jul | 54 | Poor |
| Aug | 67 | Unhealthy |
| Sep | 85 | Unhealthy |
| Oct | 146 | Unhealthy |
| Nov | 219 | Very unhealthy |
| Dec | 252 | Very unhealthy |
Growing season
Birgañj is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Birgañj banks about 5,679 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around May.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 195 | 269 | 459 | 585 | 654 | 624 | 605 | 602 | 563 | 510 | 369 | 245 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 195 |
| Feb | 269 |
| Mar | 459 |
| Apr | 585 |
| May | 654 |
| Jun | 624 |
| Jul | 605 |
| Aug | 602 |
| Sep | 563 |
| Oct | 510 |
| Nov | 369 |
| Dec | 245 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Birgañj receives about 4.9 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.8 and 6.7 kWh/m².
The brighter stretch of the year lasts 4.2 months, from around Feb 15 to Jun 21. The brightest month is April, averaging about 6.6 kWh/m² (intense).
The dimmest month is December, down near 3.8 kWh/m² — roughly 42% less than the April peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.0 | 4.9 | 6.0 | 6.7 | 6.5 | 5.3 | 4.0 | 4.1 | 4.2 | 4.7 | 4.3 | 3.8 |
| Level | Bright | Bright | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 4.0 | Bright |
| Feb | 4.9 | Bright |
| Mar | 6.0 | Intense |
| Apr | 6.7 | Intense |
| May | 6.5 | Intense |
| Jun | 5.3 | Bright |
| Jul | 4.0 | Bright |
| Aug | 4.1 | Bright |
| Sep | 4.2 | Bright |
| Oct | 4.7 | Bright |
| Nov | 4.3 | Bright |
| Dec | 3.8 | Moderate |
Where is Birgañj?
Birgañj sits at 27.0°N, 84.9°E, 89 m above sea level, in Nepal. The nearest listed city is Hetauda, 48 km away.
Topography around Birgañj
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Birgañj.
Within 3 km, the terrain around Birgañj has only modest variations in elevation — a maximum elevation change of 15 m around an average of 83 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 66 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,848 m.
The land around Birgañj is covered by cropland (49%) and artificial surfaces (33%) within 3 km, cropland (80%) within 16 km, and cropland (56%) and trees (39%) within 80 km.
Nepal travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / D / M
- 230 V · 50 Hz
- Prices
- ≈ 24% of US
- price level, 2025
- GDP per capita
- $1,536
- 2025
- Happiness
- 5.1 / 10
- World Happiness, 2025
- Safe drinking water
- 16%
- of population, 2024
- Homicide rate
- 2.1
- per 100k, 2020
- Road deaths
- 16.3
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Moderate
- EF EPI 514
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Birgañj (27.0174°, 84.8805°, elevation 89 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).