Udon Thani in Fall

In fall (September, October and November), Udon Thani sees average daytime highs around 31°C and overnight lows near 23°C, with 392 mm of rain over about 39 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.

Across fall, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 35% of the time across fall, and the air most often feels miserable.

Fall is Udon Thani's 2nd-best season to visit on our travel score. For the whole year in context, see Udon Thani's year-round climate.

Avg daytime high: 31°C; 3rd-warmest season
Avg overnight low: 23°C
Rainfall: 392 mm; 39 wet days
Avg wind: 6 km/h
Travel score: 4.3; 2nd-best season
Months: Sep · Oct · Nov

← Summer Udon Thani year-round climate Winter →

Spring Summer Fall Winter

Temperature in Udon Thani in Fall

Average highAverage lowShaded bands: 10–90% of days

Across fall, daytime highs hold fairly steady around 31°C.

A typical fall day in Udon Thani reaches about 31°C and drops to 23°C overnight. The warmest of the three months is September, the coolest November.

How fall really feels in Udon Thani

Once humidity and wind are folded in, fall brings about 74 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C

14 feel dangerously hot (≥ 39°C)

Days feeling ≤ 0°C

wind chill below the day's low

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

Udon Thani weather by month

How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 17°	8	1.4	11.1	6.8
Feb	32° / 19°	14	2.4	11.4	5.3
Mar	34° / 22°	31	5.8	11.9	3.5
Apr	35° / 25°	62	10.4	12.4	2.4
May	34° / 26°	211	21.9	12.8	2.1
Jun	33° / 26°	221	23	13	2.3
Jul	32° / 26°	266	25.6	12.9	2.4
Aug	32° / 25°	331	27	12.6	2.4
Sep	32° / 25°	276	24.5	12.1	2.7
Oct	31° / 23°	96	11.8	11.6	4.3
Nov	30° / 21°	20	2.9	11.2	5.9
Dec	29° / 18°	6	0.9	11	7.2

Cloud cover in Fall

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time across fall.

Chance of precipitation in Fall

Any precipitation

Udon Thani gets around 392 mm of rain over 39 wet days across fall. The line is the day-by-day chance of measurable precipitation.

Humidity in Fall

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Fall

Winds average 6 km/h across fall.

Sunrise & sunset in Fall

DaylightNight

Daylight runs from about 12 h 18 min in early September to 11 hours by late November. The lit band spans sunrise to sunset each day.

Solar energy in Fall

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across fall, about 4.7 kWh/m².

Planning a trip in fall

Hazard calendar for Udon Thani

In seasonPeak

In fall, Udon Thani overlaps its monsoon season. The full year is below, with each hazard's peak months called out.

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 fall a good time to visit Udon Thani?

Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

4.3

Sightseeing

2nd-best month of the year

6.3

Beach & pool

2nd-best month of the year

fall is a reasonable time to visit Udon Thani for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Udon Thani in Fall

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

In fall, Udon Thani sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 39 days see rain.

light clothesrain gearsun protection

UV index in Udon Thani in Fall

LowModerateHighVery highExtreme

Clear-sky midday UV across fall averages around 10 (very high — sun protection essential). 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	8	10	12	10	12	13	13	13	11	10	8	8
Level	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	8	Very high
Feb	10	Very high
Mar	12	Extreme
Apr	10	Extreme
May	12	Extreme
Jun	13	Extreme
Jul	13	Extreme
Aug	13	Extreme
Sep	11	Extreme
Oct	10	Extreme
Nov	8	Very high
Dec	8	Very high

Air quality in Udon Thani in Fall

GoodModeratePoorUnhealthyVery unhealthy

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	42	54	65	52	36	28	27	29	34	37	35	34
Level	Poor	Poor	Unhealthy	Poor	Poor	Moderate	Moderate	Moderate	Moderate	Poor	Poor	Moderate

	PM2.5 (µg/m³)	Level
Jan	42	Poor
Feb	54	Poor
Mar	65	Unhealthy
Apr	52	Poor
May	36	Poor
Jun	28	Moderate
Jul	27	Moderate
Aug	29	Moderate
Sep	34	Moderate
Oct	37	Poor
Nov	35	Poor
Dec	34	Moderate

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

artificial surfaces 58%

16 km

70 m

cropland 48%

80 km

511 m

cropland 62%

treesgrasslandcroplandartificial surfacesbare terrainwater

← Summer Udon Thani year-round climate Winter →

Fall 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

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.