yearsofweather

Chiang Mai in August:
very hot, rain on every second day

Chiang Mai, Thailand · Records from 2006 to 2025. Not a forecast.

Mean high32°Hottest day 37.2° (2009)
Mean low24°Coldest night 22.4° (2017)
Rain days17 days9-23 by year
Rainfall219mmDaylight 13.0 → 12.5 h
Chiang Mai's 12 months iBest: December and January
Trip types Sightseeing on foot Poorhot, frequent rain and muggy
Humidity82%31 muggy days
Clear days0 days28 overcast days
Mean wind4 km/hRarely windy
Sunrise / sunset (15th)06:06 / 18:52Daylight 13.0 → 12.5 h

Chiang Mai in August

The rainiest month of the year. Paths turn muddy, and waterproof shoes make outdoor days easier. On wet days switch to indoor options such as cafes, massage and museums.

It was a hot month: 32°C by day and 24°C after dark. Rain came so often (17 days on average) that dry stretches were short and worth using. It varied a lot from year to year. August 2009 had 9 rain days; 2018 had 23.

Highs topped 30°C on 25 days of the month on average. Mixing in indoor stops at midday made sense.

Typhoons i No tropical storm passed within 300 km in this month over the last 20 years. Typhoons: May

Date by date i

‹ July August 2027 September ›
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
1-7rain on 61% of days31° 24°
8-14rain on 54% of days32° 24°
15-21rain on 51% of days31° 24°
22-28rain on 53% of days32° 24°
29-31rain on 50% of days32° 24°

0-5/206-8/209-11/2012-20/20

1-7rain on 61% of days31° 24°
8-14rain on 54% of days32° 24°
15-21rain on 51% of days31° 24°
22-28rain on 53% of days32° 24°
29-31rain on 50% of days32° 24°
Tap another date to change

2006none
2007none
20085mm
200940mm
201018mm
201184mm
20129mm
2013none
201410mm
20157mm
201610mm
20175mm
2018none
20197mm
20205mm
2021none
202230mm
202321mm
202411mm
20251mm
Holidays in August (2027)
  • August 12 Mother's Day (Queen Sirikit's Birthday)

1 Local public holiday or break (busier, pricier)

Your trip dates, the past 20 years

Trip dates ~

You can also click two dates on the axis. Hover a cell to see that day's rain.
Trip rain days Month rain days
2006
1 d 17 d
2007
3 d 16 d
2008
4 d 16 d
2009
2 d 9 d
2010
5 d 22 d
2011
6 d 19 d
2012
2 d 16 d
2013
3 d 13 d
2014
6 d 21 d
2015
6 d 17 d
2016
7 d 16 d
2017
3 d 13 d
2018
4 d 23 d
2019
6 d 21 d
2020
6 d 17 d
2021
3 d 12 d
2022
5 d 18 d
2023
6 d 13 d
2024
5 d 20 d
2025
3 d 17 d
Years with rain
Tap a date to start, tap another to end. Each cell is that date in one year.
'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
of 20
9
14
12
12
10
14
15
13
12
8
10
13
9
10
11
12
9
9
6
10
14
11
11
10
11
10
11
10
10
9
11
Rain days on trip
13425623667346635653

No rain1-9 mm10 mm or more Dates outside your trip are dimmed.

One row per year, one cell per day. 2009 had 9 rain days, 2018 had 23.

Chiang Mai through the year

MonthHighLowRain daysRainfall
JanuaryGood 30°16°1 day14mm
February 33°17°1 day3mm
March 35°20°2 days20mm
April 37°23°5 days57mm
May 35°24°12 days181mm
June 33°25°11 days108mm
July 32°24°15 days162mm
August 32°24°17 days219mm
September 32°24°14 days198mm
October 32°23°10 days170mm
November 31°20°4 days52mm
DecemberGood 29°17°1 day10mm

Common questions

Does it rain a lot in Chiang Mai in August?

Over the past 20 years August averaged 17 rain days (1 mm or more) out of 31. Individual years ran from 9 in the driest to 23 in the wettest.

What should I wear in Chiang Mai in August?

Days averaged 32°C and nights 24°C. Pack an umbrella, sandals that can get wet, T-shirts, sunscreen plus a hat, and insect repellent.

Is August a good time to visit Chiang Mai?

On warmth and rain days alone, Chiang Mai's easiest months were December and January. August ranked 10 of 12.

Is Chiang Mai humid in August?

Mean relative humidity was 82%, with about 31 muggy days (dew point of 20°C or more) in the month.