Chiang Rai weather by month
Averages and records for each calendar month at Chiang Rai, Thailand, from 1951 to 2025. The warmest month is April, averaging 34.8°C; the coolest is December at 27.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 28.1°C | 12.7°C | 34.3°C25 January 2001 | 1.5°C2 January 1974 | 69 / 75 |
| February | 31.1°C | 13.3°C | 37.0°C22 February 2009 | 6.5°C11 February 1963 | 69 / 75 |
| March | 33.7°C | 16.6°C | 39.3°C25 March 1991 | 6.0°C5 March 1986 | 70 / 75 |
| April | 34.8°C | 20.1°C | 41.3°C30 April 1960 | 11.4°C16 April 1952 | 68 / 75 |
| May | 33.3°C | 22.3°C | 41.8°C19 May 2019 | 17.1°C16 May 2006 | 70 / 75 |
| June | 32.1°C | 23.2°C | 39.6°C2 June 1992 | 18.5°C2 June 1955 | 72 / 75 |
| July | 31.1°C | 23.1°C | 38.6°C23 July 1961 | 19.0°C12 July 1971 | 70 / 75 |
| August | 30.7°C | 23.0°C | 35.9°C10 August 2024 | 18.5°C16 August 1955 | 69 / 75 |
| September | 31.0°C | 22.3°C | 37.0°C7 September 1971 | 16.4°C23 September 1971 | 70 / 74 |
| October | 30.4°C | 20.7°C | 35.0°C3 October 1962 | 11.0°C30 October 1978 | 68 / 74 |
| November | 28.9°C | 17.3°C | 34.9°C15 November 2009 | 5.0°C21 November 1971 | 68 / 74 |
| December | 27.1°C | 13.4°C | 33.5°C21 December 2007 | 1.5°C25 December 1999 | 69 / 74 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 68 to 72 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.