Nakhon Sawan weather in December

In December, Nakhon Sawan sees average daytime highs of 32°C and overnight lows near 21°C, with 8 mm of rain across 1.2 wet days and about 11.1 hours of daylight. It is the 12th-warmest and 12th-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 53% of the time in December, and the air most often feels muggy.

Daylight stretches from about 11 h 06 min at the start of December to 11 h 06 min by month's end. Set against the rest of the year, December is Nakhon Sawan's 4th-clearest and 8th-windiest month. For the whole year in context, see Nakhon Sawan's year-round climate.

Daytime high
32°
12th warmest
Overnight low
21°
2nd coldest
Rainfall
8 mm
1.2 wet days
Daylight
11 h 06 min
6:43 AM – 5:48 PM
Cloud cover
41%
4th clearest
Wind
7 km/h
8th windiest
Solar energy
4.64 kWh/m²
Travel score
5.2
out of 10

Nakhon Sawan is city in Nakhon Sawan province, Thailand.

Air quality
High
PM2.5 28 µg/m³ · 2019
Density
2,953/km²
people per km²

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical December day in Nakhon Sawan reaches about 32°C in the afternoon and slips back to 21°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°C. Set against its neighbours, December runs about 1°C cooler than November and about 1°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13222
23222
33222
43222
53222
63222
73222
83222
93221
103221
113221
123221
133221
143221
153221
163221
173221
183121
193121
203120
213120
223120
233120
243120
253120
263120
273120
283220
293220
303220
313220

How December really feels in Nakhon Sawan

Once humidity and wind are folded in, December averages 26 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
26
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Nakhon Sawan weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 21°10211.24.6
Feb35° / 23°11211.53.2
Mar37° / 25°386.211.91.8
Apr38° / 27°6211.412.31.1
May36° / 27°1562112.71.3
Jun35° / 27°14723.312.91.5
Jul35° / 27°16123.512.81.8
Aug34° / 26°21525.112.51.9
Sep33° / 26°27225.912.12.0
Oct33° / 25°14317.111.63.1
Nov32° / 23°244.711.34.3
Dec32° / 21°81.211.15.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 20% of December, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16832
26832
36733
46832
56832
66832
76832
86832
96832
106931
116931
127030
137030
147228
157327
167327
177525
187525
197624
207723
217723
227723
237822
247822
257822
267822
277822
287822
297723
307723
317624

Chance of precipitation in December

Any precipitation

Nakhon Sawan gets around 8 mm of rain over 1.2 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 4% and peaks near 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
17
27
36
46
56
65
75
85
94
104
114
123
133
143
153
162
172
182
192
202
213
223
233
243
253
263
274
284
294
305
315

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 57% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1251538337
2261638326
3261739316
4271739295
5271840285
6281940275
7281940264
8292040244
9292141233
103102241223
113112240212
123122340202
133132440192
143142439181
154152538181
164162537171
175162636171
185172635160
195182734160
206182734150
216192833140
227192832140
237192932130
247193032130
257193031120
267183132120
277183132120
287173232120
297163332120
306163333120
316153433130

Wind in December

Winds average 7 km/h in December.

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

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 06 min at the start of December to 11 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:35 AM to 6:50 AM, and sunset from 5:43 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:355:43
211.16:365:43
311.16:365:44
411.16:375:44
511.16:375:44
611.16:385:44
711.16:395:45
811.16:395:45
911.16:405:45
1011.16:405:46
1111.16:415:46
1211.16:415:46
1311.16:425:47
1411.16:425:47
1511.16:435:47
1611.16:435:48
1711.16:445:48
1811.16:445:49
1911.16:455:49
2011.16:455:49
2111.16:465:50
2211.16:465:50
2311.16:475:51
2411.16:475:51
2511.16:485:52
2611.16:485:52
2711.16:495:53
2811.16:495:53
2911.16:495:54
3011.16:505:54
3111.16:505:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.64 kWh/m².

For context, solar energy here swings from a low near 4.49 kWh/m² to a high of 6.25 kWh/m² in April across the year — December's 4.64 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.8Bright
314.8Bright
Planning a trip in December

Hazard calendar for Nakhon Sawan

In seasonPeak

In December, Nakhon Sawan sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Nakhon Sawan sits in the Pacific typhoon belt; the season peaks July–October.

Nakhon Sawan's monsoon runs May–October, when most of the year's rain falls.

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

Is December a good time to visit Nakhon Sawan?

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

5.2
Sightseeing
1st-best month of the year
8.1
Beach & pool
1st-best month of the year

December is a reasonable time to visit Nakhon Sawan for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Nakhon Sawan in December

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

In December, Nakhon Sawan sees daytime highs around 32°C and nights near 21°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Nakhon Sawan in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nakhon Sawan peaks around August 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 15UV 13Dec 12UV 8
UV index (midday)Level
Jan9Very high
Feb10Very high
Mar12Extreme
Apr10Extreme
May12Extreme
Jun12Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec8Very high

Air quality in Nakhon Sawan 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 Nakhon Sawan is worst in March — around 41 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (June, 18 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Nakhon Sawan's WHO annual average of 28 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 1240 µg/m³Jun 2218 µg/m³
PM2.5 (µg/m³)Level
Jan37Poor
Feb39Poor
Mar41Poor
Apr34Moderate
May25Moderate
Jun18Moderate
Jul18Moderate
Aug19Moderate
Sep22Moderate
Oct26Moderate
Nov27Moderate
Dec32Moderate
Location & terrain

Where is Nakhon Sawan?

Nakhon Sawan sits at 15.7°N, 100.1°E, 31 m above sea level, in Thailand. The nearest listed city is Lat Yao, 38 km away.

Topography around Nakhon Sawan

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

Within 3 km, the terrain around Nakhon Sawan has only modest variations in elevation — a maximum elevation change of 150 m around an average of 31 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 194 m; within 80 km, large variations in elevation — a maximum elevation change of 756 m.

The land around Nakhon Sawan is covered by artificial surfaces (37%), trees (26%) and cropland (20%) within 3 km, cropland (61%) within 16 km, and cropland (85%) within 80 km.

3 km
150 m
16 km
194 m
80 km
756 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Lat Yao 38 km · Thap Than 38 km · Uthai Thani 38 km · Bang Mun Nak 44 km · Khanu Woralaksaburi 50 km · Chai Nat 58 km · Taphan Hin 65 km · Thap Khlo 71 km

Thailand travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C
230 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$8,057
2025
Happiness
6.3 / 10
World Happiness, 2025
Homicide rate
4.8
per 100k, 2011
Road deaths
32.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 402
Religion
Buddhist 93%Muslim 5%Christian 1%other 1%

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 Nakhon Sawan (15.7047°, 100.1372°, elevation 31 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).