Climate and average weather in Najran
In Najran, the summers are sweltering, dry, and partly cloudy and the winters are warm and clear.
Over the course of the year, the temperature in Najran typically varies from 9°C to 37°C, and is rarely below 5°C or above 39°C. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Najran for warm-weather activities is from late October to late February.
- Hottest
- Jul
- 37°
- Coldest
- Jan
- 9°
- Wettest
- Apr
- 13 mm
- Driest
- Sep
- 0 mm
- Rain / yr
- 40 mm
- 9 wet days
- Daylight
- 11.0–13.0 h
- shortest–longest
- Elevation
- 1,310 m
- 17.5°N
- Clearest
- Dec
- 13% cloud
Najran is City in the southeast of Saudi Arabia.
- Founded
- ~1999 BCE
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Najran 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 late October to late February.
Temperature through the year
Daily average highs and lows in Najran, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.4 months, from May 8 to September 18, with daily high temperatures above 34°C. The hottest month of the year in Najran is July, with an average high of 37°C and low of 23°C.
The cool season lasts 3.1 months, from November 11 to February 11, with daily high temperatures below 27°C. The coldest month of the year in Najran is January, with an average low of 9°C and high of 25°C.
Days typically run about 15°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 27 | 30 | 32 | 35 | 37 | 37 | 37 | 34 | 30 | 27 | 25 |
| Avg low (°C) | 9 | 12 | 15 | 18 | 21 | 21 | 23 | 22 | 20 | 16 | 12 | 10 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 25 | 9 |
| Feb | 27 | 12 |
| Mar | 30 | 15 |
| Apr | 32 | 18 |
| May | 35 | 21 |
| Jun | 37 | 21 |
| Jul | 37 | 23 |
| Aug | 37 | 22 |
| Sep | 34 | 20 |
| Oct | 30 | 16 |
| Nov | 27 | 12 |
| Dec | 25 | 10 |
How hot and cold Najran 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, Najran feels like about 37°C (around July 14). About 167 days a year carry some heat stress, peaking in July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 25 | 27 | 30 | 32 | 35 | 36 | 37 | 37 | 34 | 30 | 27 | 25 |
| Air high (°C) | 25 | 27 | 30 | 32 | 35 | 37 | 37 | 37 | 34 | 30 | 27 | 25 |
| Feels-like low (°C) | 8 | 12 | 15 | 18 | 21 | 21 | 23 | 22 | 20 | 16 | 12 | 9 |
| Air low (°C) | 9 | 12 | 15 | 18 | 21 | 21 | 23 | 22 | 20 | 16 | 12 | 10 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 25 | 25 | 8 | 9 |
| Feb | 27 | 27 | 12 | 12 |
| Mar | 30 | 30 | 15 | 15 |
| Apr | 32 | 32 | 18 | 18 |
| May | 35 | 35 | 21 | 21 |
| Jun | 36 | 37 | 21 | 21 |
| Jul | 37 | 37 | 23 | 23 |
| Aug | 37 | 37 | 22 | 22 |
| Sep | 34 | 34 | 20 | 20 |
| Oct | 30 | 30 | 16 | 16 |
| Nov | 27 | 27 | 12 | 12 |
| Dec | 25 | 25 | 9 | 10 |
Average hourly temperature in Najran
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 July afternoons, near 37°C, and coldest before dawn in January, near 9°C.
Najran 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 | 25° / 9° | 2 | 0.5 | 11.1 | 9.3 |
| Feb | 27° / 12° | 2 | 0.5 | 11.4 | 8.6 |
| Mar | 30° / 15° | 10 | 2 | 11.9 | 6.5 |
| Apr | 32° / 18° | 13 | 3.6 | 12.4 | 4.9 |
| May | 35° / 21° | 4 | 1 | 12.8 | 3.5 |
| Jun | 37° / 21° | 1 | 0.1 | 13 | 2.3 |
| Jul | 37° / 23° | 2 | 0.4 | 12.9 | 1.8 |
| Aug | 37° / 22° | 2 | 0.5 | 12.6 | 1.9 |
| Sep | 34° / 20° | 0 | 0 | 12.1 | 3.8 |
| Oct | 30° / 16° | 3 | 0.5 | 11.6 | 7.1 |
| Nov | 27° / 12° | 1 | 0.2 | 11.2 | 9.0 |
| Dec | 25° / 10° | 0 | 0 | 11 | 9.5 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Najran gets about 40 mm of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.
The wetter season lasts 2.6 months, from around Mar 3 to May 21, peaking in April at about 13% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 28.
April is the wettest month by volume, with 13 mm over about 4 wet days; September is the driest, with 0 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 2 | 2 | 6 | 12 | 4 | 1 | 1 | 1 | 0 | 1 | 1 | 0 |
| Rain days | 1 | 1 | 2 | 4 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 2 | 1 |
| Feb | 2 | 1 |
| Mar | 6 | 2 |
| Apr | 12 | 4 |
| May | 4 | 1 |
| Jun | 1 | 0 |
| Jul | 1 | 0 |
| Aug | 1 | 1 |
| Sep | 0 | 0 |
| Oct | 1 | 1 |
| Nov | 1 | 0 |
| Dec | 0 | 0 |
Monthly rainfall
Over a full year, Najran collects about 40 mm of rain across 9 wet days — roughly 3 mm in an average month.
It doesn’t fall evenly. April is the wettest month with 13 mm, while September is the driest at just 0 mm. The three wettest months alone bring about 67% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 2 | 2 | 10 | 13 | 4 | 1 | 2 | 2 | 0 | 3 | 1 | 0 |
| Rain days | 1 | 1 | 2 | 4 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 2 | 1 |
| Feb | 2 | 1 |
| Mar | 10 | 2 |
| Apr | 13 | 4 |
| May | 4 | 1 |
| Jun | 1 | 0 |
| Jul | 2 | 0 |
| Aug | 2 | 1 |
| Sep | 0 | 0 |
| Oct | 3 | 1 |
| Nov | 1 | 0 |
| Dec | 0 | 0 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Najran, 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 August 31 and lasts for 7.6 months, ending around April 18. The clearest month is October, when the sky is clear, mostly clear, or partly cloudy 94% of the time on average.
The cloudier part of the year begins around June 3 and lasts for 2.9 months, ending around August 30. The cloudiest month is July, when it is overcast or mostly cloudy 36% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 90 | 90 | 89 | 87 | 86 | 80 | 64 | 78 | 91 | 94 | 94 | 94 |
| Cloudier (%) | 10 | 10 | 11 | 13 | 14 | 20 | 36 | 22 | 9 | 6 | 6 | 6 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 90 | 10 |
| Feb | 90 | 10 |
| Mar | 89 | 11 |
| Apr | 87 | 13 |
| May | 86 | 14 |
| Jun | 80 | 20 |
| Jul | 64 | 36 |
| Aug | 78 | 22 |
| Sep | 91 | 9 |
| Oct | 94 | 6 |
| Nov | 94 | 6 |
| Dec | 94 | 6 |
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 May 30, brings about 13 hours of light; the shortest, around January 1, only 11 hours — a swing of roughly 2 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.1 | 11.4 | 11.9 | 12.4 | 12.8 | 13.0 | 12.9 | 12.6 | 12.1 | 11.6 | 11.2 | 11.0 |
| Sunrise (AM) | 6:41 | 6:36 | 6:17 | 5:52 | 5:35 | 5:33 | 5:41 | 5:50 | 5:55 | 6:01 | 6:14 | 6:31 |
| Sunset (PM) | 5:45 | 6:00 | 6:09 | 6:16 | 6:24 | 6:35 | 6:38 | 6:25 | 6:01 | 5:36 | 5:24 | 5:28 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 11.1 | 6:41 | 5:45 |
| Feb | 11.4 | 6:36 | 6:00 |
| Mar | 11.9 | 6:17 | 6:09 |
| Apr | 12.4 | 5:52 | 6:16 |
| May | 12.8 | 5:35 | 6:24 |
| Jun | 13.0 | 5:33 | 6:35 |
| Jul | 12.9 | 5:41 | 6:38 |
| Aug | 12.6 | 5:50 | 6:25 |
| Sep | 12.1 | 5:55 | 6:01 |
| Oct | 11.6 | 6:01 | 5:36 |
| Nov | 11.2 | 6:14 | 5:24 |
| Dec | 11.0 | 6:31 | 5:28 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Najran averages about 22 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 27 days.
The sunnier stretch runs 7.0 months, from around Sep 11 to Apr 12. The sunniest month is October, with roughly 26 sunny days (brilliant).
The greyest month is July, down near 11 sunny days — about 60% fewer than the October peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 25 | 23 | 24 | 21 | 21 | 18 | 11 | 15 | 22 | 27 | 26 | 27 |
| Sky | Brilliant | Brilliant | Brilliant | Bright | Bright | Bright | Mixed | Mixed | Bright | Brilliant | Brilliant | Brilliant |
| Sunny days | Sky | |
|---|---|---|
| Jan | 25 | Brilliant |
| Feb | 23 | Brilliant |
| Mar | 24 | Brilliant |
| Apr | 21 | Bright |
| May | 21 | Bright |
| Jun | 18 | Bright |
| Jul | 11 | Mixed |
| Aug | 15 | Mixed |
| Sep | 22 | Bright |
| Oct | 27 | Brilliant |
| Nov | 26 | Brilliant |
| Dec | 27 | 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 Najran, the air stays dry or comfortable essentially all year. Even in August, the muggiest month, it feels humid or worse only about 1% of the time — humidity is not something you need to plan around here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 99 | 96 | 91 | 96 | 99 | 96 | 94 | 100 | 98 | 99 | 100 |
| Comfortable (%) | 0 | 1 | 4 | 8 | 3 | 0 | 3 | 5 | 0 | 1 | 1 | 0 |
| Humid (%) | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 100 | 0 | 0 |
| Feb | 99 | 1 | 0 |
| Mar | 96 | 4 | 0 |
| Apr | 91 | 8 | 1 |
| May | 96 | 3 | 1 |
| Jun | 99 | 0 | 0 |
| Jul | 96 | 3 | 1 |
| Aug | 94 | 5 | 1 |
| Sep | 100 | 0 | 0 |
| Oct | 98 | 1 | 1 |
| Nov | 99 | 1 | 0 |
| Dec | 100 | 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 Najran is typically calm, near 11 km/h, and varies moderately with the seasons.
The windier part of the year lasts 4.4 months, from around May 12 to Sep 23. The windiest month is July, averaging about 15 km/h (light breeze).
The calmer part of the year runs from around Sep 24 to May 11, with December the calmest month at about 9 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 9 | 10 | 11 | 11 | 11 | 13 | 15 | 14 | 12 | 10 | 9 | 9 |
| Feels | calm | calm | calm | calm | calm | light breeze | light breeze | light breeze | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 9 | calm |
| Feb | 10 | calm |
| Mar | 11 | calm |
| Apr | 11 | calm |
| May | 11 | calm |
| Jun | 13 | light breeze |
| Jul | 15 | light breeze |
| Aug | 14 | light breeze |
| Sep | 12 | calm |
| Oct | 10 | calm |
| Nov | 9 | calm |
| Dec | 9 | calm |
Hazard calendar for Najran
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Najran sees seasonal dust haze (April–August), heaviest in July.
Best time to visit Najran
To characterize how pleasant the weather is in Najran throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late February, Najran 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 Najran for general outdoor tourist activities is from late October to late February, with a peak score in the last 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) | 9.3 | 8.5 | 6.5 | 4.9 | 3.5 | 2.3 | 1.8 | 2.0 | 3.9 | 7.1 | 9.0 | 9.5 |
| Rating | ideal | ideal | good | fair | poor | poor | poor | poor | fair | good | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 9.3 | ideal |
| Feb | 8.5 | ideal |
| Mar | 6.5 | good |
| Apr | 4.9 | fair |
| May | 3.5 | poor |
| Jun | 2.3 | poor |
| Jul | 1.8 | poor |
| Aug | 2.0 | poor |
| Sep | 3.9 | fair |
| Oct | 7.1 | good |
| Nov | 9.0 | ideal |
| Dec | 9.5 | ideal |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Najran for hot-weather activities is from mid September to mid May, with a peak score in the third week of October.
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 Najran, 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 July (highs near 37°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 25°C), pack light clothes and sun protection.
In July, Najran sees daytime highs around 37°C and nights near 23°C. Pack light clothes and sun protection.
UV index (midday) in Najran 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 Najran peaks around April 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 8 (very high).
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) | 10 | 12 | 13 | 14 | 12 | 11 | 11 | 12 | 10 | 11 | 8 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 10 | Extreme |
| Oct | 11 | Extreme |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Average hourly UV index in Najran
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 April the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6.5 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) | 7 | 7.5 | 8 | 8.5 | 8.5 | 8.5 | 8 | 8 | 7.5 | 7.5 | 6.5 | 6.5 |
| UV ≥ 6 (h/day) | 4.5 | 5.5 | 6 | 6.5 | 6.5 | 6 | 6 | 6 | 5.5 | 5.5 | 4 | 3.5 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 7 | 4.5 |
| Feb | 7.5 | 5.5 |
| Mar | 8 | 6 |
| Apr | 8.5 | 6.5 |
| May | 8.5 | 6.5 |
| Jun | 8.5 | 6 |
| Jul | 8 | 6 |
| Aug | 8 | 6 |
| Sep | 7.5 | 5.5 |
| Oct | 7.5 | 5.5 |
| Nov | 6.5 | 4 |
| Dec | 6.5 | 3.5 |
Air quality in Najran 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 Najran is worst in February — around 50 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (October, 24 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) | 39 | 50 | 46 | 48 | 44 | 47 | 49 | 43 | 35 | 24 | 25 | 28 |
| Level | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 39 | Poor |
| Feb | 50 | Poor |
| Mar | 46 | Poor |
| Apr | 48 | Poor |
| May | 44 | Poor |
| Jun | 47 | Poor |
| Jul | 49 | Poor |
| Aug | 43 | Poor |
| Sep | 35 | Moderate |
| Oct | 24 | Moderate |
| Nov | 25 | Moderate |
| Dec | 28 | Moderate |
Growing season
Najran 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. Najran banks about 5,085 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 218 | 267 | 391 | 455 | 547 | 568 | 619 | 608 | 513 | 395 | 284 | 221 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 218 |
| Feb | 267 |
| Mar | 391 |
| Apr | 455 |
| May | 547 |
| Jun | 568 |
| Jul | 619 |
| Aug | 608 |
| Sep | 513 |
| Oct | 395 |
| Nov | 284 |
| Dec | 221 |
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.
Najran receives about 6.4 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 5.4 and 7.4 kWh/m².
The brighter stretch of the year lasts 4.6 months, from around Mar 2 to Jul 18. The brightest month is May, averaging about 7.4 kWh/m² (intense).
The dimmest month is December, down near 5.5 kWh/m² — roughly 26% less than the May peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.5 | 6.1 | 6.7 | 7.1 | 7.4 | 7.1 | 6.5 | 6.6 | 6.7 | 6.5 | 5.8 | 5.5 |
| Level | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 5.5 | Bright |
| Feb | 6.1 | Intense |
| Mar | 6.7 | Intense |
| Apr | 7.1 | Intense |
| May | 7.4 | Intense |
| Jun | 7.1 | Intense |
| Jul | 6.5 | Intense |
| Aug | 6.6 | Intense |
| Sep | 6.7 | Intense |
| Oct | 6.5 | Intense |
| Nov | 5.8 | Bright |
| Dec | 5.5 | Bright |
Where is Najran?
Najran sits at 17.5°N, 44.1°E, 1,310 m above sea level, in Saudi Arabia. The nearest listed city is Al Mash‘ilīyah, 46 km away.
Topography around Najran
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Najran.
Within 3 km, the terrain around Najran has significant variations in elevation — a maximum elevation change of 452 m around an average of 1,377 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 802 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,717 m.
The land around Najran is covered by bare terrain (60%) and cropland (21%) within 3 km, bare terrain (88%) within 16 km, and bare terrain (97%) within 80 km.
Saudi Arabia travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type G
- 230 V · 60 Hz
- Prices
- ≈ 47% of US
- price level, 2025
- GDP per capita
- $34,537
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Homicide rate
- 0.9
- per 100k, 2019
- Road deaths
- 35.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 404
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 Najran (17.4933°, 44.1277°, elevation 1,310 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).