Chiang Rai Weather in May
Chiang Rai in May sees very high temperatures, with highs around 34°C (93°F) and overnight lows of 24°C (75°F). With the rainy season in full effect, expect around 258 mm (10 in) of rainfall and regular showers throughout the month.
Rainfall in Chiang Rai in May
Chiang Rai is in the rainy season in May, with rain on around 17 days and an average of 258 mm (10 in). The rain this month falls heavily when it arrives. Late afternoons in particular can see strong showers, so waterproofs are worth keeping handy.
Temperature in Chiang Rai in May
Expect highs of 34°C (93°F) in Chiang Rai in May, with nights dropping to around 24°C (75°F). It's usually most comfortable outside during the morning and later in the day. Nights are warm at 24°C (75°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Sunshine in Chiang Rai in May
The days are predominantly sunny, with an estimated total of around 199 hours of sunshine. Rain is often only seen in the afternoon or evening, leaving clear skies for most of the day. This results in rainy months that still feel bright and are suitable for travel.Our weather planner can help you find worldwide destinations with pleasant weather during this period. December typically offers the best weather for Chiang Rai.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Chiang Rai's climate page.
Chiang Rai Temperature in May
Min Temperature
24°C (75°F)
Max Temperature
34°C (93°F)
Chance of Rain
56%
Precipitation
258 mm (10 in)
Rainy days
17 days
Humidity
76%
Sunshine
199 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Chiang Rai typically stay consistent throughout May, with daily highs averaging around 34°C (93°F). Nights are warm, with lows around 23°C (73°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Chiang Rai in May
Browse day-by-day weather records for Chiang Rai spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Chiang Rai historical weather extremes in May
Based on weather observations in Chiang Rai between 1976 and 2026, these are the recorded extremes during May.
- On May 20, 2019, temperatures climbed to 42°C (108°F), marking the warmest May day on record.
- The lowest daytime temperature in May was 20°C (68°F), recorded on May 20, 2000.
- Nighttime temperatures dropped to 17°C (63°F) on May 16, 2006, marking the coldest May night on record.
Best Places in Thailand in May
Find out more about the weather in Thailand and which places have the best travel conditions in this month. See all of Thailand in May →
perfect weather
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tolerable
unpleasant
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What to Wear in Chiang Rai in May
Get ready for hot weather in May! Lightweight, breathable fabrics are your best friend during this month. Cotton and linen shirts, shorts, sundresses, and sandals will keep you comfortable. Light colors help reflect the heat, avoid wearing black. Also bring a poncho, it will rain a lot! Waterproof everything you can. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Chiang Rai in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Chiang Rai's climate page.
Temperature Rainfall Sunshine Humidity
See the full Chiang Rai climate overview or explore weather in Thailand.
