Weather in Chiang Rai - 14-day forecast

Detailed weather forecast for Chiang Rai, Thailand: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Chiang Rai

today🌧️ 28°💧 6 mm

Sun🌧️ 31°💧 8.4 mm

Mon🌧️ 30°💧 20.9 mm

Tue🌧️ 24°💧 20.2 mm

Wed🌧️ 30°💧 1.5 mm

Thu🌧️ 31°💧 14.4 mm

Fri🌧️ 29°💧 25 mm

Sat🌧️ 30°💧 2.6 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Tuesday 8 Sept in Chiang Rai, the forecast high is 24°C. Typical daytime temperatures at this time of year range from 29°C to 31°C, so it will be exceptionally cool. It is cooler than 99% of similar days.

Saturday 5 Sept

28°Cexceptionally cool

usually 28°C–31°C

cooler than 90% of similar days

night: exceptionally warm rain: typical rainfall wind: lighter than usual

Sunday 6 Sept

31°Cnear normal

usually 29°C–31°C

night: exceptionally warm rain: typical rainfall wind: lighter than usual

Monday 7 Sept

30°Cnear normal

usually 28°C–31°C

night: exceptionally warm rain: more rain than usual wind: lighter than usual

Tuesday 8 Sept

24°Cexceptionally cool

usually 29°C–31°C

cooler than 99% of similar days

night: exceptionally warm rain: more rain than usual wind: lighter than usual

Wednesday 9 Sept

30°Cnear normal

usually 28°C–31°C

night: exceptionally warm rain: less rain than usual wind: lighter than usual

Thursday 10 Sept

31°Cwarmer than usual

usually 28°C–31°C

warmer than 74% of similar days

night: exceptionally warm rain: more rain than usual wind: exceptionally light

Friday 11 Sept

29°Ccooler than usual

usually 28°C–31°C

cooler than 74% of similar days

night: warmer than usual rain: exceptionally wet wind: lighter than usual

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 30°C by day. The coolest year was 1981 (28°C) and the warmest was 2009 (33°C). The current forecast averages 29°C - lower than in 78% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Chiang Rai

Chiang Rai - 14-day weather forecast infographic

Chiang Rai 30 & 45-day weather - long-range outlook

Next 16 days · forecast

30°

around 24° at night · days with rain: 14

Weeks 3-4 · avg for September

31°

around 23° at night · rain chance 49%

Weeks 5-7 · avg for October

30°

around 22° at night · rain chance 38%

The 30 & 45-day outlook for Chiang Rai: the next 16 days are a numerical forecast updated daily - on average 30° by day and 24° at night. Further out we rely on multi-year climate averages: around 31° in September, and about 30° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Chiang Rai

Saturday5 September 2026

🌧️28°moderate rain

sunrise 06:06 · sunset 18:33 · night 24° · evening 29° · rain 6.03 mm · humidity 87% · wind 2 m/s · clouds 81%

Sunday6 September 2026

🌧️31°moderate rain

sunrise 06:06 · sunset 18:32 · night 25° · evening 29° · rain 8.43 mm · humidity 65% · wind 2 m/s · clouds 31%

Monday7 September 2026

🌧️30°moderate rain

sunrise 06:06 · sunset 18:31 · night 24° · evening 26° · rain 20.88 mm · humidity 69% · wind 2 m/s · clouds 100%

Tuesday8 September 2026

🌧️24°moderate rain

sunrise 06:06 · sunset 18:30 · night 23° · evening 23° · rain 20.18 mm · humidity 96% · wind 2 m/s · clouds 100%

Wednesday9 September 2026

🌧️30°light rain

sunrise 06:07 · sunset 18:29 · night 24° · evening 25° · rain 1.45 mm · humidity 66% · wind 2 m/s · clouds 100%

Thursday10 September 2026

🌧️31°moderate rain

sunrise 06:07 · sunset 18:29 · night 23° · evening 25° · rain 14.36 mm · humidity 65% · wind 1 m/s · clouds 84%

Friday11 September 2026

🌧️29°moderate rain

sunrise 06:07 · sunset 18:28 · night 22° · evening 24° · rain 24.99 mm · humidity 73% · wind 2 m/s · clouds 59%

Saturday12 September 2026

🌧️30°light rain

sunrise 06:07 · sunset 18:27 · night 24° · evening 26° · rain 2.55 mm · humidity 49% · wind 2 m/s · clouds 46%

Sunday13 September 2026

☁️30°overcast clouds

sunrise 06:07 · sunset 18:26 · night 24° · evening 24° · rain 1.5 mm · humidity 48% · wind 2 m/s · clouds 90%

Monday14 September 2026

🌤️31°a few clouds

sunrise 06:08 · sunset 18:25 · night 23° · evening 24° · rain 2.22 mm · humidity 49% · wind 1 m/s · clouds 18%

Tuesday15 September 2026

🌧️31°light rain

sunrise 06:08 · sunset 18:24 · night 24° · evening 25° · rain 0.21 mm · humidity 54% · wind 2 m/s · clouds 1%

Wednesday16 September 2026

☀️32°clear sky

sunrise 06:08 · sunset 18:23 · night 26° · evening 26° · rain 6.24 mm · humidity 50% · wind 2 m/s · clouds 1%

Thursday17 September 2026

🌧️32°moderate rain

sunrise 06:08 · sunset 18:22 · night 24° · evening 26° · rain 8.82 mm · humidity 50% · wind 2 m/s · clouds 75%

Friday18 September 2026

🌧️32°light rain

sunrise 06:09 · sunset 18:21 · night 25° · evening 26° · rain 1.05 mm · humidity 48% · wind 2 m/s · clouds 67%

Saturday19 September 2026

🌧️32°light rain

sunrise 06:09 · sunset 18:20 · night 25° · evening 27° · rain 0.15 mm · humidity 49% · wind 1 m/s · clouds 23%

Sunday20 September 2026

🌧️33°light rain

sunrise 06:09 · sunset 18:19 · night 25° · evening 27° · rain 2.16 mm · humidity 48% · wind 2 m/s · clouds 9%

UV index in Chiang Rai - is it safe to sunbathe?

Today the UV index in Chiang Rai is 9 (very high) - unprotected fair skin can burn in about 20 minutes. SPF 50, long sleeves and shade between 10:00 and 16:00.

Chiang Rai weather through the year

Warmest, driest months on average: January, February, November, December.

Upcoming public holidays in Thailand: King Bhumibol Memorial Day — 13 October · Chulalongkorn Day — 23 October · King Bhumibol's Birthday, National Day and Father's Day — 7 December. Full calendar and travel notes

Nearby and related places

Chiang MaiMuang XayLuang PrabangVang ViengTaunggyiSukhothaiPhitsanulokKo ChangKo Pha NganBangkokKo Samui

FAQ - Chiang Rai weather

What is the weather like in Chiang Rai today?

Today it is about 28° during the day and 24° at night, moderate rain.

How far ahead can I check the forecast for Chiang Rai?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.