Siddharthanagar weather in December

In December, Siddharthanagar sees average daytime highs of 23°C and overnight lows near 11°C, with 9 mm of rain across 0.9 wet days and about 10.3 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 21°C by the end. The sky is clear or mostly clear about 73% 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 Siddharthanagar's 3rd-clearest and 10th-windiest month. For the whole year in context, see Siddharthanagar's year-round climate.

Daytime high
23°
11th warmest
Overnight low
11°
2nd coldest
Rainfall
9 mm
0.9 wet days
Daylight
10 h 18 min
6:59 AM – 5:16 PM
Cloud cover
25%
3rd clearest
Wind
5 km/h
10th windiest
Solar energy
3.66 kWh/m²
Travel score
8.9
out of 10

Siddharthanagar is city in western Nepal.

Density
1,759/km²
people per km²
Founded
1967

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 25°C in the first days to 21°C by the end.

A typical December day in Siddharthanagar reaches about 23°C in the afternoon and slips back to 11°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 25°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12513
22513
32513
42512
52412
62412
72412
82412
92412
102412
112412
122311
132311
142311
152311
162311
172311
182211
192211
202210
212210
222210
232210
242210
252210
262110
272110
282110
292110
30219
31219

How December really feels in Siddharthanagar

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.

Siddharthanagar 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
Jan21° / 192.410.58.1
Feb25° / 12°192.5118.5
Mar31° / 16°122.211.86.1
Apr35° / 21°153.612.62.9
May36° / 24°499.413.32.3
Jun34° / 26°25019.613.72.3
Jul32° / 26°3952813.62.3
Aug32° / 26°34627.3132.4
Sep31° / 25°18822.112.23.2
Oct30° / 21°375.411.35.8
Nov27° / 15°40.610.68.4
Dec23° / 11°90.910.38.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 73% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 14%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18812
28614
38614
48614
58614
68614
78614
88614
98614
108614
118614
128515
138614
148614
158614
168614
178614
188614
198614
208614
218614
228614
238614
248614
258614
268515
278515
288416
298416
308416
318317

Chance of precipitation in December

Any precipitation

Siddharthanagar gets around 9 mm of rain over 0.9 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 3% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
12
22
32
42
52
62
73
83
93
103
113
123
133
143
153
163
173
183
193
203
213
223
233
243
254
264
274
284
295
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 68% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1395110
240519
342508
444507
545496
647485
749474
851454
954433
1055423
1158402
1260382
1362362
1466331
1568311
1670291
1772271
1876240
1978220
2080200
2182180
2283170
2385150
2486140
2587130
2688120
2789110
2890100
299190
309280
319370

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 5 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
295calm
305calm
315calm

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 6:49 AM to 7:06 AM, and sunset from 5:13 PM to 5:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.46:495:13
210.46:505:13
310.46:515:13
410.46:515:13
510.36:525:13
610.36:535:13
710.36:545:13
810.36:545:13
910.36:555:14
1010.36:565:14
1110.36:565:14
1210.36:575:14
1310.36:575:15
1410.36:585:15
1510.36:595:15
1610.36:595:16
1710.37:005:16
1810.37:005:16
1910.37:015:17
2010.37:015:17
2110.37:025:18
2210.37:025:18
2310.37:035:18
2410.37:035:19
2510.37:045:19
2610.37:045:20
2710.37:045:21
2810.37:055:21
2910.37:055:22
3010.37:065:22
3110.37:065:23

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.66 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.66 kWh/m² to a high of 6.65 kWh/m² in April across the year — December's 3.66 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.7Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.7Moderate
173.7Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.7Moderate
313.7Moderate
Planning a trip in December

Hazard calendar for Siddharthanagar

In seasonPeak

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

Siddharthanagar'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 Siddharthanagar?

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

8.9
Sightseeing
1st-best month of the year
6.6
Beach & pool
5th-best month of the year

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

What to pack for Siddharthanagar in December

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

In December, Siddharthanagar sees daytime highs around 23°C and nights near 11°C. Worth packing: light clothes.

light clothes

UV index in Siddharthanagar 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 Siddharthanagar peaks around July 22 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 highExtremeVery highModerateJul 22UV 10Nov 22UV 4
UV index (midday)Level
Jan4Moderate
Feb4Moderate
Mar8Very high
Apr8Very high
May9Very high
Jun8Very high
Jul11Extreme
Aug10Extreme
Sep9Very high
Oct6High
Nov4Moderate
Dec4Moderate

Air quality in Siddharthanagar 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 Siddharthanagar 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 Siddharthanagar?

Siddharthanagar sits at 27.5°N, 83.5°E, 107 m above sea level, in Nepal. The nearest listed city is Lumbini, 20 km away.

WāliṅBāgluṅChitwanPokharaTulsi̇̄pur

Topography around Siddharthanagar

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

Within 3 km, the terrain around Siddharthanagar has only modest variations in elevation — a maximum elevation change of 20 m around an average of 105 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 62 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,677 m.

The land around Siddharthanagar is covered by cropland (58%) and artificial surfaces (25%) within 3 km, cropland (80%) within 16 km, and cropland (49%) and trees (46%) within 80 km.

3 km
20 m
16 km
62 m
80 km
2,677 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Lumbini 20 km · Butwāl 21 km · Tānsen 42 km · Wāliṅ 62 km · Bāgluṅ 87 km · Chitwan 99 km · Pokhara 99 km · Tulsi̇̄pur 133 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 Siddharthanagar (27.5°, 83.45°, elevation 107 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).