Thailand Chiang Rai Weather in August — Climate Guide
August in Chiang Rai is moderate
Chiang Rai Weather in August — Quick Answer
As of 2026- Avg temp
- 31° / 23°
- Rainfall
- 230mm · 21 days
- Crowds
- Quiet
As of 2026, Chiang Rai in August averages a high of 31°C and low of 23°C with 230mm of rain over about 21 days. Wettest month. Warm and very humid (31°C), with the year's heaviest, most frequent rain. Light clothing, full rain gear, and waterproof or quick-dry footwear. Greenest scenery of the year between showers.
August is moderate for Chiang Rai.
August is typically the wettest month in Chiang Rai (around 230mm over some 21 rainy days), with high humidity and the most frequent downpours. Days hover around 31°C. It's the height of the green season — the hills, tea terraces, and rice paddies are at their most vivid, and the waterfalls are roaring.
The air is clean and the views, when the rain pauses, are wonderfully clear. It's the quietest and cheapest time of year, with the major sights nearly empty and hotel rates at their lowest. For photographers chasing green landscapes and dramatic skies, August can be rewarding.
Travel score
Chiang Rai August Weather Stats
Avg High
31°C
Avg Low
23°C
Rainy Days
21
230mm total
Sunshine
4.5h
Daily avg
Humidity
82%
muggy
UV Index
8
Very high
Wind
5 km/h
Gusts 14
Crowds
Quiet
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
16 μg/m³
PM10
32 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
35°C
Nighttime
24°C
Humidity and wind affect how the actual temperature feels.
Wind
5 km/h
Max gust 14 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Greenest scenery and fullest waterfalls
- Clean, haze-free air
- Lowest crowds and prices of the year
- Dramatic skies for photography
Cons
- Wettest month — heavy, frequent rain
- Very humid (82%)
- Muddy roads; rare localized flooding
- Many lost afternoons
August Events & Festivals
- Wettest month of the year
- Greenest landscapes and fullest waterfalls
- Clean, haze-free air
- Lowest crowds, lowest prices
Chiang Rai in August — Full Picture
August is typically the wettest month in Chiang Rai (around 230mm over some 21 rainy days), with high humidity and the most frequent downpours. Days hover around 31°C. It's the height of the green season — the hills, tea terraces, and rice paddies are at their most vivid, and the waterfalls are roaring.
The air is clean and the views, when the rain pauses, are wonderfully clear. It's the quietest and cheapest time of year, with the major sights nearly empty and hotel rates at their lowest. For photographers chasing green landscapes and dramatic skies, August can be rewarding.
The honest downside is the rain — heavy and frequent enough that some days lose their afternoons, and rural mountain roads can get muddy or, rarely, see localized flooding. This is a month for flexible travelers who'll sightsee in the morning breaks and embrace the wet-season mood.
Pack light clothing, full rain gear, and waterproof footwear, and build slack into your plans. Mornings offer the best chance of dry sightseeing windows.
What to Wear & What to Pack
Wettest month. Warm and very humid (31°C), with the year's heaviest, most frequent rain. Light clothing, full rain gear, and waterproof or quick-dry footwear. Greenest scenery of the year between showers.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
34.3°C
21°C
7.7/mo
Summer (Jun·Jul·Aug)
Current31.7°C
23°C
19/mo
Autumn (Sep·Oct·Nov)
30.3°C
20°C
12/mo
Winter (Dec·Jan·Feb)
28.7°C
14.7°C
1.3/mo
Chiang Rai Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 28° | 14° | 1d·10mm | 9h | 65% | 8 | Very busy | Peak |
| 31° | 16° | 1d·10mm | 9h | 60% | 9 | Busy | Peak | |
| 34° | 18° | 2d·20mm | 8h | 55% | 10 | Quiet | Low season | |
| 36° | 22° | 5d·60mm | 8h | 60% | 11 | Moderate | Shoulder | |
| 33° | 23° | 16d·200mm | 6.5h | 75% | 9 | Quiet | Low season | |
| 32° | 23° | 17d·160mm | 5.5h | 78% | 9 | Quiet | Low season | |
| 32° | 23° | 19d·190mm | 5h | 80% | 9 | Quiet | Low season | |
| 31° | 23° | 21d·230mm | 4.5h | 82% | 8 | Quiet | Low season | |
| 31° | 22° | 20d·215mm | 5h | 82% | 8 | Quiet | Low season | |
| 31° | 21° | 12d·110mm | 6.5h | 78% | 8 | Moderate | Shoulder | |
| November (Best) | 29° | 17° | 4d·40mm | 8.5h | 70% | 8 | Busy | Peak |
| December (Best) | 27° | 14° | 2d·15mm | 8.5h | 68% | 7 | Very busy | Peak |
View Other Months
Chiang Rai August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Chiang Rai?
Chiang Rai in August is moderate. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in Chiang Rai in August?
Chiang Rai August averages a high of 31°C and a low of 23°C.
Does it rain much in Chiang Rai in August?
Chiang Rai August averages 230mm of rainfall over about 21 rainy days.
What should I wear in Chiang Rai in August?
Wettest month. Warm and very humid (31°C), with the year's heaviest, most frequent rain. Light clothing, full rain gear, and waterproof or quick-dry footwear. Greenest scenery of the year between showers.
What time are sunrise and sunset in Chiang Rai in August?
Chiang Rai August sunrise is 06:00 and sunset is 18:25, with 12h 25min of daylight.
What's the air quality like in Chiang Rai in August?
Chiang Rai August air quality (AQI) averages 40, rated Good. PM2.5 averages 16μg/m³.
What activities are recommended in Chiang Rai in August?
In August, Chiang Rai is great for Waterfalls (at their fullest), Green tea country and rice terraces, Temples (morning breaks).
Is August peak season in Chiang Rai?
Chiang Rai August crowds are quiet and prices are low season. You can travel relatively comfortably without long queues.
Best Months to Visit Chiang Rai
View Other Months
Planning a August trip to Chiang Rai?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.