Birgañj weather in September

In September, Birgañj sees average daytime highs of 32°C and overnight lows near 26°C, with 225 mm of rain across 22.7 wet days and about 12.2 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 29% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Birgañj's 10th-clearest and 7th-windiest month. For the whole year in context, see Birgañj's year-round climate.

Daytime high
32°
7th warmest
Overnight low
26°
8th coldest
Rainfall
225 mm
22.7 wet days
Daylight
12 h 12 min
5:55 AM – 6:05 PM
Cloud cover
63%
10th clearest
Wind
7 km/h
7th windiest
Solar energy
4.23 kWh/m²
Travel score
2.8
out of 10

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.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Birgañj reaches about 32°C in the afternoon and slips back to 26°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13226
23226
33226
43226
53226
63226
73226
83226
93226
103226
113226
123226
133226
143226
153226
163226
173226
183225
193225
203225
213225
223225
233225
243225
253225
263225
273225
283225
293224
303224

How September really feels in Birgañj

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
29 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Birgañj weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 10°131.810.58.7
Feb26° / 13°172.1118.4
Mar32° / 17°122.111.85.0
Apr37° / 23°265.212.62.1
May37° / 26°7611.513.31.7
Jun35° / 27°22520.513.71.9
Jul33° / 27°44228.613.52.1
Aug32° / 27°34728.2132.2
Sep32° / 26°22522.712.22.8
Oct31° / 22°45511.45.2
Nov29° / 16°50.410.77.7
Dec24° / 12°70.610.39.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12377
22575
32575
42773
52872
63070
73169
83367
93466
103664
113763
123961
134060
144159
154357
164456
174555
184753
194951
205149
215347
225545
235743
245941
256139
266436
276634
286733
297030
307228

Chance of precipitation in September

Any precipitation

Birgañj gets around 225 mm of rain over 22.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 74% and peaks near 89% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
189
288
388
488
587
687
786
885
984
1083
1182
1281
1380
1479
1578
1677
1775
1874
1972
2071
2169
2267
2365
2463
2561
2658
2756
2854
2951
3049

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the miserable band about 91% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
100100
200100
300100
400100
500100
600100
70199
80199
90199
100199
110298
120298
130397
140397
150496
160595
170694
180892
190991
2001090
2101288
2201387
2301585
2401783
2511881
2612079
2712277
2812574
2912772
3023068

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over September. Sunrise moves from 5:48 AM to 6:02 AM, and sunset from 6:22 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:486:22
212.55:496:21
312.55:496:20
412.55:506:19
512.55:506:17
612.45:516:16
712.45:516:15
812.45:526:14
912.35:526:13
1012.35:526:12
1112.35:536:10
1212.35:536:09
1312.25:546:08
1412.25:546:07
1512.25:556:06
1612.25:556:05
1712.15:566:03
1812.15:566:02
1912.15:566:01
2012.05:576:00
2112.05:575:59
2212.05:585:57
2312.05:585:56
2411.95:595:55
2511.95:595:54
2611.96:005:53
2711.96:005:51
2811.86:015:50
2911.86:015:49
3011.86:025:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.23 kWh/m².

For context, solar energy here swings from a low near 3.82 kWh/m² to a high of 6.66 kWh/m² in April across the year — September's 4.23 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.2Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.2Bright
144.2Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
Planning a trip in September

Hazard calendar for Birgañj

In seasonPeak

In September, Birgañj sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Birgañj's monsoon runs June–September, when most of the year's rain falls.

Birgañj sees seasonal dust haze (June), heaviest in June.

Monsoon
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Birgañj?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.8
Sightseeing
7th-best month of the year
4.6
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Birgañj.

What to pack for Birgañj in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Birgañj sees daytime highs around 32°C and nights near 26°C. Pack light clothes and rain gear. About 23 days see rain.

light clothesrain gear

UV index in Birgañj in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highExtremeVery highModerateJul 19UV 11Nov 22UV 4
UV index (midday)Level
Jan4Moderate
Feb4Moderate
Mar9Very high
Apr8Very high
May8Very high
Jun7Very high
Jul11Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec4Moderate

Air quality in Birgañj in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual 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).

0306090120150180210240270JanFebMarAprMayJunJulAugSepOctNovDecVery unhealthyUnhealthyVery unhealthyJan 10256 µg/m³Jul 1956 µg/m³
PM2.5 (µg/m³)Level
Jan257Very unhealthy
Feb211Very unhealthy
Mar167Very unhealthy
Apr124Unhealthy
May89Unhealthy
Jun80Unhealthy
Jul54Poor
Aug67Unhealthy
Sep85Unhealthy
Oct146Unhealthy
Nov219Very unhealthy
Dec252Very unhealthy
Location & terrain

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.

HetaudaGaurMalaṅgawāKi̇̄rtipurPatanChitwanKathmanduMadhyapur Thimi

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.

3 km
15 m
16 km
66 m
80 km
2,848 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hetauda 48 km · Gaur 48 km · Malaṅgawā 70 km · Ki̇̄rtipur 83 km · Patan 85 km · Chitwan 86 km · Kathmandu 88 km · Madhyapur Thimi 89 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
Hindu 81%Buddhist 8%Muslim 5%Kirat 3%

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).