Triyuga weather in September

In September, Triyuga sees average daytime highs of 30°C and overnight lows near 24°C, with 244 mm of rain across 23.6 wet days and about 12.2 hours of daylight. It is the 7th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 20% 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 Triyuga's 9th-clearest and 8th-windiest month. For the whole year in context, see Triyuga's year-round climate.

Daytime high
30°
7th warmest
Overnight low
24°
9th coldest
Rainfall
244 mm
23.6 wet days
Daylight
12 h 12 min
5:48 AM – 5:57 PM
Cloud cover
69%
9th clearest
Wind
6 km/h
8th windiest
Solar energy
3.91 kWh/m²
Travel score
3.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Triyuga reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°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)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153024
163024
173024
183024
193024
203024
213024
223024
233024
243024
253024
263024
273024
283023
293023
303023

How September really feels in Triyuga

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
heat index over the day's high
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.

Triyuga weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 10°111.810.58.4
Feb25° / 13°122.111.18.5
Mar31° / 17°122.511.85.9
Apr34° / 21°325.612.63.5
May34° / 24°10114.213.33.1
Jun32° / 25°26123.713.72.7
Jul31° / 25°4142813.52.6
Aug31° / 25°29127.612.92.7
Sep30° / 24°24423.612.23.3
Oct30° / 21°647.611.45.9
Nov27° / 16°50.710.78.5
Dec24° / 12°40.610.39.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11981
22080
32179
42278
52377
62377
72575
82674
92872
102872
112971
123169
133268
143268
153367
163466
173565
183664
193763
203961
214159
224258
234555
244654
254852
265050
275248
285545
295743
305941

Chance of precipitation in September

Any precipitation

Triyuga gets around 244 mm of rain over 23.6 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 77% and peaks near 87% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
187
286
386
485
585
684
784
883
982
1081
1181
1280
1380
1479
1579
1679
1778
1878
1977
2077
2176
2275
2374
2472
2571
2669
2767
2865
2963
3061

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 63% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
101486
201585
301684
401783
501882
601981
702080
802179
902377
1002476
1102575
1202773
1302872
1413069
1513168
1613366
1713564
1813762
1923959
2024157
2124355
2234651
2334849
2435146
2535443
2645541
2745838
2856035
2956332
3066529

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 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
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 5:41 AM to 5:54 AM, and sunset from 6:15 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:416:15
212.55:426:13
312.55:426:12
412.55:436:11
512.55:436:10
612.45:436:09
712.45:446:08
812.45:446:07
912.35:456:05
1012.35:456:04
1112.35:466:03
1212.35:466:02
1312.25:476:01
1412.25:476:00
1512.25:475:58
1612.25:485:57
1712.15:485:56
1812.15:495:55
1912.15:495:54
2012.05:505:52
2112.05:505:51
2212.05:515:50
2312.05:515:49
2411.95:515:48
2511.95:525:47
2611.95:525:45
2711.95:535:44
2811.85:535:43
2911.85:545:42
3011.85:545:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.91 kWh/m².

For context, solar energy here swings from a low near 3.57 kWh/m² to a high of 6.15 kWh/m² in April across the year — September's 3.91 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
234.0Moderate
244.0Moderate
254.0Moderate
264.0Moderate
274.0Bright
284.0Bright
294.1Bright
304.1Bright
Planning a trip in September

Hazard calendar for Triyuga

In seasonPeak

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

Triyuga'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 Triyuga?

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

3.3
Sightseeing
8th-best month of the year
4.7
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Triyuga.

What to pack for Triyuga in September

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

In September, Triyuga sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. About 24 days see rain.

light clothesrain gear

UV index in Triyuga 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 Triyuga peaks around July 19 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 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 12Nov 21UV 4
UV index (midday)Level
Jan4Moderate
Feb4Moderate
Mar9Very high
Apr8Very high
May9Very high
Jun8Very high
Jul12Extreme
Aug10Very high
Sep10Extreme
Oct7High
Nov4Moderate
Dec4Moderate

Air quality in Triyuga 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 Triyuga is worst in January — around 112 µg/m³ PM2.5 (unhealthy), about 4.6× the cleanest month (July, 24 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 14112 µg/m³Jul 2025 µg/m³
PM2.5 (µg/m³)Level
Jan112Unhealthy
Feb103Unhealthy
Mar87Unhealthy
Apr70Unhealthy
May55Unhealthy
Jun42Poor
Jul24Moderate
Aug30Moderate
Sep39Poor
Oct61Unhealthy
Nov85Unhealthy
Dec107Unhealthy
Location & terrain

Where is Triyuga?

Triyuga sits at 26.8°N, 86.7°E, 165 m above sea level, in Nepal. The nearest listed city is Lahān, 23 km away.

InaruwaSirahaDharānĪṭahari̇̄DhankutāBiratnagar

Topography around Triyuga

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

Within 3 km, the terrain around Triyuga has significant variations in elevation — a maximum elevation change of 308 m around an average of 182 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,824 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,025 m.

The land around Triyuga is covered by cropland (42%) and trees (35%) within 3 km, trees (83%) within 16 km, and trees (51%) and cropland (40%) within 80 km.

3 km
308 m
16 km
1,824 m
80 km
4,025 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Lahān 23 km · Rājbirāj 28 km · Inaruwa 49 km · Siraha 51 km · Dharān 58 km · Īṭahari̇̄ 59 km · Dhankutā 66 km · Biratnagar 68 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 Triyuga (26.7919°, 86.699°, elevation 165 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).