Chiang Rai weather in October

In October, Chiang Rai sees average daytime highs of 30°C and overnight lows near 22°C, with 139 mm of rain across 17.8 wet days and about 11.5 hours of daylight. It is the 9th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 32% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of October to 11 h 18 min by month's end. Set against the rest of the year, October is Chiang Rai's 7th-clearest and 11th-windiest month. For the whole year in context, see Chiang Rai's year-round climate.

Daytime high
30°
9th warmest
Overnight low
22°
7th coldest
Rainfall
139 mm
17.8 wet days
Daylight
11 h 30 min
6:20 AM – 5:52 PM
Cloud cover
58%
7th clearest
Wind
4 km/h
11th windiest
Solar energy
4.38 kWh/m²
Travel score
4.4
out of 10

Chiang Rai is city in Chiang Rai province, Thailand.

Air quality
Very high
PM2.5 37 µg/m³ · 2019
Density
1,294/km²
people per km²
Founded
1936

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical October day in Chiang Rai reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, October runs on par with September and about 1°C warmer than November.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13023
23023
33022
43022
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173022
183022
193021
203021
212921
222921
232921
242921
252921
262921
272921
282920
292920
302920
312920

How October really feels in Chiang Rai

Once humidity and wind are folded in, October averages 20 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
20
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Chiang Rai weather by month

How October compares with the rest of the year at a glance. October is the 9th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 14°22310.97.7
Feb31° / 15°132.411.35.9
Mar33° / 18°425.111.94.1
Apr34° / 21°13211.812.43.1
May32° / 23°29222.812.92.8
Jun31° / 24°29726.213.22.5
Jul31° / 24°39828.413.12.6
Aug30° / 24°38328.812.72.6
Sep30° / 23°29525.112.13.0
Oct30° / 22°13917.811.54.4
Nov28° / 18°496.711.16.7
Dec26° / 15°273.710.88.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 20% of October, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
34060
44159
54258
64456
74456
84654
94654
104753
114951
124951
135050
145149
155248
165248
175347
185446
195545
205545
215743
225743
235941
245941
256040
266040
276139
286337
296337
306535
316535

Chance of precipitation in October

Any precipitation

Chiang Rai gets around 139 mm of rain over 17.8 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 56% and peaks near 72% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
172
272
372
471
570
670
769
867
966
1065
1163
1262
1360
1459
1557
1656
1754
1853
1952
2050
2149
2248
2347
2446
2545
2644
2743
2842
2941
3040
3139

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the oppressive band about 67% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1029836
21210825
31210825
41211815
51312804
61313794
71314793
81315783
91317763
101318753
111319743
121321732
131322722
141323712
152424682
162425672
172426671
182427661
192527651
202528641
212629621
222729620
233830590
243930580
2541030560
2641130550
2751331510
2861431490
2961631470
3071731440
3171932420

Wind in October

Winds average 4 km/h in October.

Across October, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 48 min at the start of October to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over October. Sunrise moves from 6:15 AM to 6:26 AM, and sunset from 6:04 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:156:04
211.86:156:03
311.86:166:02
411.86:166:02
511.76:166:01
611.76:166:00
711.76:175:59
811.76:175:58
911.76:175:57
1011.66:185:56
1111.66:185:56
1211.66:185:55
1311.66:195:54
1411.66:195:53
1511.66:195:53
1611.56:205:52
1711.56:205:51
1811.56:205:50
1911.56:215:50
2011.56:215:49
2111.46:225:48
2211.46:225:48
2311.46:225:47
2411.46:235:46
2511.46:235:46
2611.46:245:45
2711.36:245:45
2811.36:255:44
2911.36:255:43
3011.36:255:43
3111.36:265:42

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 4.38 kWh/m².

For context, solar energy here swings from a low near 4.1 kWh/m² to a high of 6.3 kWh/m² in April across the year — October's 4.38 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in October

Hazard calendar for Chiang Rai

In seasonPeak

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

Chiang Rai'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 October a good time to visit Chiang Rai?

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

4.4
Sightseeing
5th-best month of the year
5.8
Beach & pool
7th-best month of the year

October is a reasonable time to visit Chiang Rai for sightseeing.

What to pack for Chiang Rai in October

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

In October, Chiang Rai sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. About 18 days see rain.

light clothesrain gear

UV index in Chiang Rai in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks 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 Chiang Rai peaks around July 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJul 17UV 13Dec 21UV 7
UV index (midday)Level
Jan7Very high
Feb9Very high
Mar9Very high
Apr10Very high
May11Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Chiang Rai in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Chiang Rai is worst in April — around 142 µg/m³ PM2.5 (unhealthy), about 12.0× the cleanest month (July, 12 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Chiang Rai's WHO annual average of 37 µg/m³.

0306090120150JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateGoodModerateApr 11137 µg/m³Jul 2312 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb36Poor
Mar117Unhealthy
Apr142Unhealthy
May34Moderate
Jun14Moderate
Jul12Good
Aug12Good
Sep12Moderate
Oct13Moderate
Nov14Moderate
Dec17Moderate
Location & terrain

Where is Chiang Rai?

Chiang Rai sits at 19.9°N, 99.8°E, 401 m above sea level, in Thailand. The nearest listed city is Mae Chan, 27 km away.

San Kamphaeng

Topography around Chiang Rai

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

Within 3 km, the terrain around Chiang Rai has only modest variations in elevation — a maximum elevation change of 66 m around an average of 398 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 815 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,937 m.

The land around Chiang Rai is covered by artificial surfaces (43%) and trees (36%) within 3 km, trees (52%) and cropland (33%) within 16 km, and trees (70%) and cropland (21%) within 80 km.

3 km
66 m
16 km
815 m
80 km
1,937 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Mae Chan 27 km · Ban Khoan 56 km · Mae Sai 59 km · Tachilek 60 km · Ban Houakhoua 75 km · Phayao 80 km · Dok Kham Tai 85 km · San Kamphaeng 149 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 Chiang Rai (19.9086°, 99.8325°, elevation 401 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).