Udon Thani weather in December

In December, Udon Thani sees average daytime highs of 29°C and overnight lows near 18°C, with 6 mm of rain across 0.9 wet days and about 11 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 63% of the time in December, and the air most often feels humid.

Daylight stretches from about 11 hours at the start of December to 11 hours by month's end. Set against the rest of the year, December is Udon Thani's 3rd-clearest and 1st-windiest month. For the whole year in context, see Udon Thani's year-round climate.

Daytime high
29°
12th warmest
Overnight low
18°
2nd coldest
Rainfall
6 mm
0.9 wet days
Daylight
11 hours
6:36 AM – 5:34 PM
Cloud cover
33%
3rd clearest
Wind
8 km/h
1st windiest
Solar energy
4.58 kWh/m²
Travel score
7.2
out of 10

Udon Thani is city in Udon Thani province, Thailand.

Density
2,736/km²
people per km²
Founded
1936

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 29°C through the month.

A typical December day in Udon Thani reaches about 29°C in the afternoon and slips back to 18°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 32°C. Set against its neighbours, December runs about 2°C cooler than November and on par with January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13019
23019
32919
42919
52919
62919
72918
82918
92918
102918
112918
122918
132918
142918
152917
162917
172917
182917
192817
202817
212817
222817
232817
242817
252817
262817
272817
282817
292917
302917
312917

How December really feels in Udon Thani

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.

Udon Thani 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
Jan29° / 17°81.411.16.8
Feb32° / 19°142.411.45.3
Mar34° / 22°315.811.93.5
Apr35° / 25°6210.412.42.4
May34° / 26°21121.912.82.1
Jun33° / 26°22123132.3
Jul32° / 26°26625.612.92.4
Aug32° / 25°3312712.62.4
Sep32° / 25°27624.512.12.7
Oct31° / 23°9611.811.64.3
Nov30° / 21°202.911.25.9
Dec29° / 18°60.9117.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 20%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17723
27723
37723
47723
57723
67723
77723
87723
97624
107624
117723
127822
137822
147822
158020
168020
178119
188119
198218
208317
218317
228317
238317
248317
258317
268317
278317
288218
298218
308119
318020

Chance of precipitation in December

Any precipitation

Udon Thani gets around 6 mm of rain over 0.9 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 3% and peaks near 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
23
33
43
53
63
73
82
92
102
112
122
132
142
152
162
172
182
193
203
213
223
233
243
253
264
274
284
294
304
314

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1814323114
2815333113
3916333013
4917332912
51018332811
61019342810
7111934279
8112034268
9122134267
10132234256
11142333256
12152333255
13162332244
14182431244
15192430243
16202430243
17212429233
18222428233
19232428233
20242428222
21242427222
22252427212
23252528212
24252528202
25242529202
26242629202
27232630202
28222631201
29212632201
30202633201
31192733201

Wind in December

Winds average 8 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

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

Days grow by about 0 minutes over December. Sunrise moves from 6:28 AM to 6:43 AM, and sunset from 5:30 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:285:30
211.06:285:30
311.06:295:30
411.06:295:30
511.06:305:30
611.06:315:31
711.06:315:31
811.06:325:31
911.06:325:31
1011.06:335:32
1111.06:335:32
1211.06:345:32
1311.06:345:33
1411.06:355:33
1511.06:365:34
1611.06:365:34
1711.06:375:34
1811.06:375:35
1911.06:385:35
2011.06:385:36
2111.06:395:36
2211.06:395:37
2311.06:405:37
2411.06:405:38
2511.06:405:38
2611.06:415:39
2711.06:415:39
2811.06:425:40
2911.06:425:40
3011.06:425:41
3111.06:435:41

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.58 kWh/m².

For context, solar energy here swings from a low near 4.27 kWh/m² to a high of 6.1 kWh/m² in April across the year — December's 4.58 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in December

Hazard calendar for Udon Thani

In seasonPeak

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

Udon Thani's monsoon runs May–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 Udon Thani?

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

7.2
Sightseeing
1st-best month of the year
8.9
Beach & pool
1st-best month of the year

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

What to pack for Udon Thani in December

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

In December, Udon Thani sees daytime highs around 29°C and nights near 18°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Udon Thani 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 Udon Thani peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 11UV 13Dec 14UV 8
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar12Extreme
Apr10Extreme
May12Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Udon Thani 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 Udon Thani is worst in March — around 65 µg/m³ PM2.5 (unhealthy), about 2.4× the cleanest month (July, 27 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModeratePoorModerateMar 1664 µg/m³Jul 1227 µg/m³
PM2.5 (µg/m³)Level
Jan42Poor
Feb54Poor
Mar65Unhealthy
Apr52Poor
May36Poor
Jun28Moderate
Jul27Moderate
Aug29Moderate
Sep34Moderate
Oct37Poor
Nov35Poor
Dec34Moderate
Location & terrain

Where is Udon Thani?

Udon Thani sits at 17.4°N, 102.8°E, 177 m above sea level, in Thailand. The nearest listed city is Kut Chap, 23 km away.

Topography around Udon Thani

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

Within 3 km, the terrain around Udon Thani has only modest variations in elevation — a maximum elevation change of 19 m around an average of 177 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 70 m; within 80 km, significant variations in elevation — a maximum elevation change of 511 m.

The land around Udon Thani is covered by artificial surfaces (58%) and trees (32%) within 3 km, cropland (48%) and trees (35%) within 16 km, and cropland (62%) and trees (32%) within 80 km.

3 km
19 m
16 km
70 m
80 km
511 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Kut Chap 23 km · Ban Phan Don 36 km · Nong Bua Lamphu 44 km · Ban Nong Wua So 49 km · Nong Khai 52 km · Tha Bo 53 km · Ban Dung 59 km · Vientiane 64 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 Udon Thani (17.4157°, 102.7859°, elevation 177 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).