Wāliṅ weather in September

In September, Wāliṅ sees average daytime highs of 27°C and overnight lows near 20°C, with 358 mm of rain across 25.4 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 27°C through the month. The sky is clear or mostly clear about 18% of the time in September, and the air most often feels muggy.

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 Wāliṅ's 10th-clearest and 9th-windiest month. For the whole year in context, see Wāliṅ's year-round climate.

Daytime high
27°
6th warmest
Overnight low
20°
10th coldest
Rainfall
358 mm
25.4 wet days
Daylight
12 h 12 min
5:59 AM – 6:09 PM
Cloud cover
68%
10th clearest
Wind
3 km/h
9th windiest
Solar energy
3.99 kWh/m²
Travel score
4.2
out of 10

Wāliṅ is human settlement in Nepal.

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 27°C through the month.

A typical September day in Wāliṅ reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 29°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12721
22721
32721
42721
52721
62721
72721
82721
92721
102721
112721
122721
132721
142720
152720
162720
172720
182720
192720
202720
212720
222720
232720
242720
252720
262719
272719
282719
292719
302619

Wāliṅ 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
Jan17° / 516.210.46.2
Feb20° / 557.7116.7
Mar24° / 10°447.611.87.5
Apr27° / 14°6510.912.66.5
May28° / 17°14819.113.45.3
Jun28° / 20°42425.513.74.0
Jul27° / 22°71430.113.63.3
Aug27° / 22°64528.7133.5
Sep27° / 20°35825.412.24.2
Oct25° / 16°7211.211.37.1
Nov22° / 12°203.710.68.0
Dec18° / 243.510.37.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11882
21981
32080
42080
52179
62377
72476
82575
92674
102872
112872
123169
133169
143268
153466
163565
173763
183862
194060
204258
214555
224654
234852
245050
255248
265446
275743
285941
296139
306337

Chance of precipitation in September

Any precipitation

Wāliṅ gets around 358 mm of rain over 25.4 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 83% and peaks near 91% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
190
291
391
491
591
690
790
890
989
1088
1188
1287
1386
1486
1585
1684
1784
1883
1983
2082
2181
2280
2379
2478
2576
2675
2773
2871
2969
3067

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 63% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1002872
2003070
3003367
4003565
5003862
6004159
7004456
8004753
9005149
10005446
11005743
12006040
13006337
14006634
15006931
16017029
17017326
18017524
19017821
20027919
21028018
22038116
23038314
24148213
25158311
26168310
2718829
28210808
29211807
30214786

Wind in September

Winds average 3 km/h in September.

Across September, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

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 5:52 AM to 6:06 AM, and sunset from 6:27 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:526:27
212.65:536:26
312.55:536:25
412.55:546:24
512.55:546:23
612.45:556:21
712.45:556:20
812.45:566:19
912.45:566:18
1012.35:566:17
1112.35:576:15
1212.35:576:14
1312.25:586:13
1412.25:586:12
1512.25:596:10
1612.25:596:09
1712.16:006:08
1812.16:006:07
1912.16:016:06
2012.16:016:04
2112.06:026:03
2212.06:026:02
2312.06:036:01
2411.96:035:59
2511.96:045:58
2611.96:045:57
2711.96:055:56
2811.86:055:55
2911.86:065:53
3011.86:065:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.99 kWh/m².

For context, solar energy here swings from a low near 3.51 kWh/m² to a high of 6.26 kWh/m² in April across the year — September's 3.99 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
124.0Moderate
134.0Moderate
144.0Moderate
154.0Moderate
164.0Moderate
174.0Bright
184.0Bright
194.0Bright
204.0Bright
214.0Bright
224.1Bright
234.1Bright
244.1Bright
254.1Bright
264.2Bright
274.2Bright
284.2Bright
294.2Bright
304.3Bright
Planning a trip in September

Hazard calendar for Wāliṅ

In seasonPeak

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

Wāliṅ'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 Wāliṅ?

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

4.2
Sightseeing
9th-best month of the year
4.3
Beach & pool
7th-best month of the year

September is a reasonable time to visit Wāliṅ for sightseeing.

What to pack for Wāliṅ in September

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

In September, Wāliṅ sees daytime highs around 27°C and nights near 20°C. Pack rain gear. Worth having: light clothes. About 25 days see rain.

rain gearlight clothes

UV index in Wāliṅ in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Wāliṅ peaks around August 14 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 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 highHighModerateAug 14UV 11Dec 22UV 4
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar9Very high
Apr8Very high
May9Very high
Jun9Very high
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct7Very high
Nov5Moderate
Dec4Moderate

Air quality in Wāliṅ 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 Wāliṅ is worst in January — around 149 µg/m³ PM2.5 (unhealthy), about 4.5× the cleanest month (July, 33 µg/m³).

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

0306090120150JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorPoorUnhealthyJan 14148 µg/m³Jul 2134 µg/m³
PM2.5 (µg/m³)Level
Jan149Unhealthy
Feb128Unhealthy
Mar106Unhealthy
Apr89Unhealthy
May63Unhealthy
Jun58Unhealthy
Jul33Moderate
Aug39Poor
Sep46Poor
Oct79Unhealthy
Nov119Unhealthy
Dec139Unhealthy
Location & terrain

Where is Wāliṅ?

Wāliṅ sits at 28.0°N, 83.8°E, 722 m above sea level, in Nepal. The nearest listed city is Tānsen, 25 km away.

SiddharthanagarChitwanLumbiniHetauda

Topography around Wāliṅ

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

Within 3 km, the terrain around Wāliṅ has large variations in elevation — a maximum elevation change of 898 m around an average of 889 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,736 m; within 80 km, extreme variations in elevation — a maximum elevation change of 7,765 m.

The land around Wāliṅ is covered by trees (68%) within 3 km, trees (82%) within 16 km, and trees (71%) within 80 km.

3 km
898 m
16 km
1,736 m
80 km
7,765 m
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewatermoss and lichen
September weather nearby: Tānsen 25 km · Bāgluṅ 35 km · Pokhara 38 km · Butwāl 44 km · Siddharthanagar 62 km · Chitwan 75 km · Lumbini 77 km · Hetauda 140 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 Wāliṅ (27.9837°, 83.7592°, elevation 722 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).