Siraha weather in December

In December, Siraha sees average daytime highs of 24°C and overnight lows near 12°C, with 4 mm of rain across 0.6 wet days and about 10.4 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 82% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 24 min at the start of December to 10 h 18 min by month's end. Set against the rest of the year, December is Siraha's 2nd-clearest and 10th-windiest month. For the whole year in context, see Siraha's year-round climate.

Daytime high
24°
11th warmest
Overnight low
12°
2nd coldest
Rainfall
4 mm
0.6 wet days
Daylight
10 h 18 min
6:46 AM – 5:06 PM
Cloud cover
19%
2nd clearest
Wind
5 km/h
10th windiest
Solar energy
3.7 kWh/m²
Travel score
9.2
out of 10

Siraha is municipality in Siraha District, Nepal.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 23°C by the end.

A typical December day in Siraha reaches about 24°C in the afternoon and slips back to 12°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 27°C. Set against its neighbours, December runs about 4°C cooler than November and about 2°C warmer than January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12614
22613
32613
42613
52613
62613
72613
82613
92513
102512
112512
122512
132512
142512
152512
162412
172412
182411
192411
202411
212411
222411
232411
242311
252311
262311
272311
282310
292310
302310
312310

How December really feels in Siraha

Once humidity and wind are folded in, December averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Siraha weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 10°121.610.58.7
Feb26° / 13°111.611.18.4
Mar32° / 18°112.411.85.0
Apr36° / 23°265.312.62.5
May36° / 25°8511.713.32.2
Jun34° / 26°22920.813.62.3
Jul32° / 26°39326.413.52.5
Aug32° / 26°25826.112.92.5
Sep31° / 25°22021.312.23.2
Oct31° / 21°50511.45.5
Nov28° / 16°20.310.77.9
Dec24° / 12°40.610.49.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 82% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 10%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1937
2937
3937
4928
5928
6919
7919
8919
9919
10919
11919
129010
139010
148911
159010
169010
179010
189010
199010
209010
219010
229010
239010
249010
259010
269010
278911
288911
298911
308911
318911

Chance of precipitation in December

Any precipitation

Siraha gets around 4 mm of rain over 0.6 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 2% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
11
21
31
41
51
61
71
82
92
102
112
122
132
142
152
162
172
182
192
202
212
222
233
243
253
263
274
284
294
305
315

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 69% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
141499
243489
345478
447467
548456
650446
752435
855414
956404
1059383
1160373
1263352
1365332
1466322
1569301
1671281
1773261
1875241
1977230
2079210
2181190
2282180
2383170
2485150
2585150
2686140
2787130
2888120
2989110
3090100
3190100

Wind in December

Winds average 5 km/h in December.

Across December, 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.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 24 min at the start of December to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:37 AM to 6:53 AM, and sunset from 5:03 PM to 5:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.46:375:03
210.46:375:03
310.46:385:03
410.46:395:04
510.46:395:04
610.46:405:04
710.46:415:04
810.46:415:04
910.46:425:04
1010.46:435:05
1110.46:435:05
1210.46:445:05
1310.36:455:05
1410.36:455:06
1510.36:465:06
1610.36:465:06
1710.36:475:07
1810.36:475:07
1910.36:485:08
2010.36:485:08
2110.36:495:08
2210.36:495:09
2310.36:505:09
2410.36:505:10
2510.36:515:10
2610.36:515:11
2710.36:525:11
2810.36:525:12
2910.36:525:13
3010.36:535:13
3110.36:535:14

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.7 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.7 kWh/m² to a high of 6.49 kWh/m² in April across the year — December's 3.7 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.8Moderate
63.7Moderate
73.7Moderate
83.7Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.7Moderate
173.7Moderate
183.7Moderate
193.7Moderate
203.7Moderate
213.7Moderate
223.7Moderate
233.7Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.8Moderate
313.8Moderate
Planning a trip in December

Hazard calendar for Siraha

In seasonPeak

None of Siraha's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Siraha'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 December a good time to visit Siraha?

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

9.2
Sightseeing
1st-best month of the year
7.9
Beach & pool
5th-best month of the year

December is one of the better times to visit Siraha for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Siraha in December

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

In December, Siraha sees daytime highs around 24°C and nights near 12°C. Worth packing: light clothes.

light clothes

UV index in Siraha in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Siraha peaks around July 19 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 18 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 11Jan 18UV 4
UV index (midday)Level
Jan4Moderate
Feb4Moderate
Mar9Very high
Apr7Very high
May8Very high
Jun7High
Jul12Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec4Moderate

Air quality in Siraha in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Siraha is worst in January — around 169 µg/m³ PM2.5 (very unhealthy), about 4.9× the cleanest month (July, 35 µg/m³).

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

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecVery unhealthyUnhealthyPoorUnhealthyJan 12167 µg/m³Jul 2036 µg/m³
PM2.5 (µg/m³)Level
Jan169Very unhealthy
Feb138Unhealthy
Mar107Unhealthy
Apr87Unhealthy
May70Unhealthy
Jun57Unhealthy
Jul35Moderate
Aug43Poor
Sep55Unhealthy
Oct87Unhealthy
Nov125Unhealthy
Dec160Very unhealthy
Location & terrain

Where is Siraha?

Siraha sits at 26.7°N, 86.2°E, 82 m above sea level, in Nepal. The nearest listed city is Lahān, 28 km away.

TriyugaRājbirājMalaṅgawāGaurInaruwa

Topography around Siraha

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

Within 3 km, the terrain around Siraha has only modest variations in elevation — a maximum elevation change of 15 m around an average of 75 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 67 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,775 m.

The land around Siraha is covered by cropland (67%) within 3 km, cropland (78%) within 16 km, and cropland (54%) and trees (38%) within 80 km.

3 km
15 m
16 km
67 m
80 km
2,775 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Lahān 28 km · Janakpur 29 km · Jaleshwar 41 km · Triyuga 51 km · Rājbirāj 55 km · Malaṅgawā 68 km · Gaur 93 km · Inaruwa 94 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 Siraha (26.6542°, 86.2079°, elevation 82 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).