Lumbini weather in September

In September, Lumbini sees average daytime highs of 32°C and overnight lows near 25°C, with 202 mm of rain across 21.8 wet days and about 12.2 hours of daylight. It is the 6th-warmest and 4th-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 34% 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 Lumbini's 10th-clearest and 7th-windiest month. For the whole year in context, see Lumbini's year-round climate.

Daytime high
32°
6th warmest
Overnight low
25°
9th coldest
Rainfall
202 mm
21.8 wet days
Daylight
12 h 12 min
6:02 AM – 6:11 PM
Cloud cover
59%
10th clearest
Wind
6 km/h
7th windiest
Solar energy
4.28 kWh/m²
Travel score
3.1
out of 10

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 Lumbini reaches about 32°C in the afternoon and slips back to 25°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13226
23226
33226
43226
53226
63226
73226
83226
93226
103226
113226
123225
133225
143225
153225
163225
173225
183225
193225
203225
213125
223125
233125
243125
253124
263124
273124
283124
293124
303124

How September really feels in Lumbini

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
19 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.

Lumbini weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 212.510.58.2
Feb25° / 12°252.7118.5
Mar31° / 16°132.111.86.1
Apr35° / 21°154.212.62.8
May36° / 25°479.413.32.1
Jun35° / 26°2601913.72.1
Jul32° / 26°41428.313.62.2
Aug32° / 26°36127.2132.4
Sep32° / 25°20221.812.23.1
Oct31° / 21°425.711.35.7
Nov28° / 15°50.610.68.3
Dec23° / 11°90.810.38.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13169
23268
33466
43664
53763
63862
74060
84159
94357
104456
114555
124753
134951
144951
155050
165149
175248
185446
195545
205743
216040
226238
236436
246634
256733
266931
277228
287327
297624
307723

Chance of precipitation in September

Any precipitation

Lumbini gets around 202 mm of rain over 21.8 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 72% and peaks near 83% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
183
283
383
482
582
682
782
882
981
1081
1180
1280
1379
1478
1578
1677
1776
1874
1972
2071
2168
2266
2364
2462
2560
2658
2755
2853
2951
3048

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 85% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
10298
20298
30298
40397
50397
60397
70397
80496
90496
100595
110595
120694
130793
140793
150892
1601090
1701189
1801288
1911485
2011683
2111881
2212079
2312376
2422573
2522870
2623167
2733463
2833760
2944056
3044353

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:55 AM to 6:08 AM, and sunset from 6:29 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:556:29
212.55:556:28
312.55:556:27
412.55:566:25
512.55:566:24
612.45:576:23
712.45:576:22
812.45:586:21
912.45:586:20
1012.35:596:18
1112.35:596:17
1212.36:006:16
1312.26:006:15
1412.26:016:14
1512.26:016:12
1612.26:026:11
1712.16:026:10
1812.16:026:09
1912.16:036:08
2012.06:036:06
2112.06:046:05
2212.06:046:04
2312.06:056:03
2411.96:056:01
2511.96:066:00
2611.96:065:59
2711.96:075:58
2811.86:075:57
2911.86:085:56
3011.86:085:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.28 kWh/m².

For context, solar energy here swings from a low near 3.68 kWh/m² to a high of 6.73 kWh/m² in April across the year — September's 4.28 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Lumbini

In seasonPeak

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

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

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

Is September a good time to visit Lumbini?

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

3.1
Sightseeing
7th-best month of the year
4.8
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Lumbini.

What to pack for Lumbini in September

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

In September, Lumbini sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. About 22 days see rain.

light clothesrain gear

UV index in Lumbini 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 Lumbini peaks around July 21 at about 10 (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 highVery highModerateJul 21UV 10Nov 22UV 4
UV index (midday)Level
Jan4Moderate
Feb4Moderate
Mar8Very high
Apr8Very high
May9Very high
Jun8Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec4Moderate

Air quality in Lumbini 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 Lumbini is worst in January — around 166 µg/m³ PM2.5 (very unhealthy), about 4.5× the cleanest month (July, 37 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecVery unhealthyUnhealthyPoorUnhealthyVery unhealthyJan 12164 µg/m³Jul 2139 µg/m³
PM2.5 (µg/m³)Level
Jan166Very unhealthy
Feb138Unhealthy
Mar104Unhealthy
Apr90Unhealthy
May69Unhealthy
Jun63Unhealthy
Jul37Poor
Aug44Poor
Sep54Poor
Oct95Unhealthy
Nov140Unhealthy
Dec158Very unhealthy
Location & terrain

Where is Lumbini?

Lumbini sits at 27.5°N, 83.2°E, 0 m above sea level, in Nepal. The nearest listed city is Siddharthanagar, 20 km away.

TānsenWāliṅBāgluṅPokharaChitwanTulsi̇̄pur

Topography around Lumbini

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Lumbini.

Within 3 km, the terrain around Lumbini has only modest variations in elevation — a maximum elevation change of 17 m around an average of 94 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 44 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,478 m.

The land around Lumbini is covered by cropland (86%) within 3 km, cropland (84%) within 16 km, and cropland (55%) and trees (40%) within 80 km.

3 km
17 m
16 km
44 m
80 km
2,478 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Siddharthanagar 20 km · Butwāl 33 km · Tānsen 54 km · Wāliṅ 77 km · Bāgluṅ 97 km · Pokhara 115 km · Chitwan 120 km · Tulsi̇̄pur 120 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 Lumbini (27.4557°, 83.2498°, elevation 0 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).