Middle of the wetter season · Weather & things to do
Chiang Mai in August
The year's rain peaks now, with about 9.3 in (237 mm) falling in Chiang Mai, alongside highs near 87°F (30°C) and lows of 74°F (23°C).
With a comfort score of 31/100 (12th of 12), it's one of the toughest months, held back mainly by cloud cover.
- Avg high
- 87°F (30°C)
- Avg low
- 74°F (23°C)
- Rain
- 9.3 in (237 mm)
- Humidity
- 87%
- Cloud cover
- 95%
- Daylight
- ~12 h 38 min
- Comfort score
- 31/100 · Tough
What August feels like
Expect proper heat: afternoons average 87°F (30°C), so plan walking and hiking for the morning and save midday for shade, lunch or a swim.
Even at night it stays warm, around 74°F (23°C).
Humidity averages 87%, so the air feels sticky and the heat feels stronger than the thermometer says.
Expect regular rain: about 9.3 in (237 mm) falls in the month.
Expect plenty of overcast days, with cloud cover near 95%.
Plan around August
August is one of the lower-scoring months here; the best are December & January.
- Inside the wettest three-month stretch, July – September.
- Comfort slips from 37/100 in July to 31/100.
- Our Bangkok to the Andaman route recommends Nov – Mar, so August falls outside its suggested window.
What to pack for August
- Light, breathable clotheshighs average 87°F
- Sun hat and sunscreenmidday heat
- Refillable water bottleeasy to dehydrate in the heat
- Quick-dry fabrics87% average humidity
- Rain jacket and waterproof shoesfrequent rain
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Chiang Mai in August
With 9.3 in of rain, these picks lean toward food, drink and places with a roof, with outdoor options when the weather breaks.
Khao Soi Khun Yai
Small lunch-only shop known for its khao soi curry noodle soup.
Why now A sit-down stop to wait out showers in a month with 9.3 in of rain.
Chiang Mai Night Bazaar
Nightly market for crafts, clothing and food stalls.
Why now An indoor-leaning stop for a month with 9.3 in of rain.
Wat Phra That Doi Suthep
Gold-spired mountaintop temple reached by a 300-step naga staircase.
Huen Phen
Long-standing northern Thai restaurant serving khao soi, sai ua sausage and laab.
Why now Easy to slot in when August's rain moves in.
Ristr8to
Specialty coffee bar in Nimman, known for latte art.
Why now Keeps part of the day dry on wetter August days.
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~759 m to Chiang Mai's ~314 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Chiang Mai in August: quick answers
Is August a good time to visit Chiang Mai?
It's one of the tougher months here, scoring 31/100, held back mainly by cloud cover. The best months are December & January. Expect highs of 87°F (30°C) and 9.3 in (237 mm) of rain. Our Bangkok to the Andaman route recommends Nov – Mar, so August is outside its suggested window.
How hot is Chiang Mai in August?
Average highs are 87°F (30°C) and average lows 74°F (23°C), making it the 6th-coldest month by daytime highs.
Does it rain a lot in Chiang Mai in August?
Yes: about 9.3 in (237 mm) of rain falls across August on average, the wettest month of the year. The annual total is about 49.1 in (1246 mm).
What should I pack for Chiang Mai in August?
Bring light, breathable clothes (highs average 87°F), sun hat and sunscreen (midday heat), refillable water bottle (easy to dehydrate in the heat), quick-dry fabrics (87% average humidity) and rain jacket and waterproof shoes (frequent rain).
More on Chiang Mai
Planning Chiang Mai in August?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.