Lang Son weather by month
Averages and records for each calendar month at Lang Son, Vietnam, from 1974 to 2026. The warmest month is July, averaging 31.9°C; the coolest is January at 17.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 17.8°C | 11.3°C | 29.4°C10 January 1998 | 0.2°C6 January 1995 | 23 / 37 |
| February | 18.7°C | 12.5°C | 33.5°C26 February 2010 | 1.8°C8 February 2016 | 17 / 37 |
| March | 21.9°C | 16.3°C | 35.2°C17 March 1996 | 5.0°C1 March 2008 | 21 / 37 |
| April | 26.8°C | 21.1°C | 38.6°C30 April 2024 | 9.4°C3 April 1996 | 23 / 37 |
| May | 29.9°C | 23.8°C | 38.4°C4 May 2012 | 13.7°C18 May 2006 | 26 / 37 |
| June | 31.6°C | 25.1°C | 38.6°C25 June 2001 | 17.8°C14 June 2013 | 21 / 37 |
| July | 31.9°C | 24.3°C | 37.0°C12 July 1998 | 19.2°C9 July 2015 | 23 / 36 |
| August | 31.4°C | 24.1°C | 37.7°C5 August 2021 | 20.0°C28 August 2010 | 23 / 36 |
| September | 30.1°C | 24.0°C | 39.8°C24 September 1993 | 14.4°C30 September 1998 | 23 / 37 |
| October | 27.8°C | 21.6°C | 35.7°C6 October 1992 | 8.5°C26 October 1994 | 22 / 37 |
| November | 24.2°C | 14.6°C | 32.0°C11 November 2009 | 1.0°C30 November 1992 | 20 / 36 |
| December | 19.6°C | 15.6°C | 30.0°C2 December 1974 | −2.5°C21 December 1999 | 23 / 36 |
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 17 to 26 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.