Nakhon Sawan weather in January

In January, Nakhon Sawan sees average daytime highs of 33°C and overnight lows near 21°C, with 10 mm of rain across 2 wet days and about 11.2 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 63% of the time in January, and the air most often feels humid.

Daylight stretches from about 11 h 06 min at the start of January to 11 h 18 min by month's end. Set against the rest of the year, January is Nakhon Sawan's 2nd-clearest and 9th-windiest month. For the whole year in context, see Nakhon Sawan's year-round climate.

Daytime high
33°
10th warmest
Overnight low
21°
1st coldest
Rainfall
10 mm
2 wet days
Daylight
11 h 12 min
6:54 AM – 6:04 PM
Cloud cover
36%
2nd clearest
Wind
7 km/h
9th windiest
Solar energy
4.93 kWh/m²
Travel score
4.6
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 January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical January day in Nakhon Sawan reaches about 33°C in the afternoon and slips back to 21°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 35°C. Set against its neighbours, January runs about 1°C warmer than December and about 2°C cooler than February.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13220
23220
33220
43220
53220
63220
73220
83220
93220
103221
113221
123221
133221
143221
153321
163321
173321
183321
193321
203321
213321
223321
233321
243321
253321
263321
273321
283321
293321
303321
313321

How January really feels in Nakhon Sawan

Once humidity and wind are folded in, January averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Nakhon Sawan weather by month

How January compares with the rest of the year at a glance. January is the 10th-warmest and 11th-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 63% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 22%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17525
27426
37426
47228
57228
67228
77228
87129
97129
107129
117327
127327
137327
147525
157525
167624
177723
187822
198020
208020
218218
228218
238317
248416
258515
268515
278515
288515
298614
308614
318614

Chance of precipitation in January

Any precipitation

Nakhon Sawan gets around 10 mm of rain over 2 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 6% and peaks near 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
15
26
36
46
56
66
77
87
97
107
116
126
136
146
156
166
176
186
196
206
216
226
236
246
256
267
277
287
297
307
317

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the humid band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
16143433130
25143433130
35133533140
45133533140
54123533150
64123533150
74123533150
84123533160
93123533160
103123533160
113123532170
123123632170
133123631170
143123631170
153123631180
163123630180
173123630180
183123629190
193123629190
204123629190
214123528200
224123528201
234123528201
244123428211
255123328211
265123228221
275123128221
286133028221
296132928231
306142828231
316142729231

Wind in January

Winds average 7 km/h in January.

Across January, 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 January

DaylightNight

Daylight runs from about 11 h 06 min at the start of January to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over January. Sunrise moves from 6:50 AM to 6:54 AM, and sunset from 5:55 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:505:55
211.16:515:56
311.16:515:56
411.16:515:57
511.16:515:57
611.16:525:58
711.16:525:58
811.16:525:59
911.16:536:00
1011.16:536:00
1111.16:536:01
1211.16:536:01
1311.16:536:02
1411.16:546:02
1511.26:546:03
1611.26:546:04
1711.26:546:04
1811.26:546:05
1911.26:546:05
2011.26:546:06
2111.26:546:06
2211.26:546:07
2311.26:546:07
2411.26:546:08
2511.26:546:09
2611.26:546:09
2711.36:546:10
2811.36:546:10
2911.36:546:11
3011.36:546:11
3111.36:546:12

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.93 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 — January's 4.93 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in January

Hazard calendar for Nakhon Sawan

In seasonPeak

In January, 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 January a good time to visit Nakhon Sawan?

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

4.6
Sightseeing
2nd-best month of the year
7.8
Beach & pool
2nd-best month of the year

January 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 January

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

In January, Nakhon Sawan sees daytime highs around 33°C and nights near 21°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Nakhon Sawan in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 9 (very high — sun protection essential). 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 January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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
January 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).