Son La weather by month
Averages and records for each calendar month at Son La, Vietnam, from 1997 to 2026. The warmest month is May, averaging 30.1°C; the coolest is January at 21.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 21.3°C | 11.4°C | 31.5°C30 January 2005 | 0.8°C20 January 1999 | 20 / 29 |
| February | 23.6°C | 14.9°C | 34.3°C22 February 2009 | 0.5°C9 February 2016 | 16 / 29 |
| March | 27.1°C | 16.6°C | 36.6°C31 March 2007 | 6.6°C6 March 2005 | 18 / 30 |
| April | 30.0°C | 19.8°C | 38.2°C28 April 2024 | 8.5°C1 April 1998 | 20 / 30 |
| May | 30.1°C | 21.4°C | 38.0°C20 May 2019 | 14.7°C7 May 2007 | 20 / 30 |
| June | 30.1°C | 23.6°C | 37.0°C1 June 2023 | 16.8°C13 June 2013 | 20 / 30 |
| July | 30.0°C | 23.3°C | 39.9°C18 July 2014 | 19.0°C8 July 2015 | 19 / 30 |
| August | 30.0°C | 22.5°C | 34.4°C6 August 2003 | 19.3°C20 August 2002 | 19 / 30 |
| September | 29.6°C | 22.5°C | 39.0°C13 September 2004 | 14.5°C30 September 1998 | 18 / 30 |
| October | 27.7°C | 20.2°C | 39.8°C5 October 1999 | 10.0°C10 October 2002 | 19 / 29 |
| November | 25.0°C | 14.6°C | 34.0°C13 November 2005 | 0.7°C27 November 2007 | 18 / 29 |
| December | 21.8°C | 14.4°C | 30.6°C2 December 2005 | 0.5°C27 December 1999 | 21 / 29 |
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 16 to 21 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.