Altai climate by month
Averages and records for each calendar month at Altai, Mongolia, from 1956 to 2026. The warmest month is July, averaging 21.0°C; the coolest is January at −10.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −10.4°C | −19.7°C | 4.4°C15 January 2024 | −39.2°C31 January 2005 | 45 / 61 |
| February | −7.8°C | −19.9°C | 7.9°C27 February 2007 | −39.8°C18 February 2005 | 38 / 62 |
| March | −1.4°C | −15.6°C | 13.1°C31 March 2001 | −35.9°C4 March 1985 | 48 / 63 |
| April | 6.8°C | −0.9°C | 23.4°C30 April 2020 | −32.1°C4 April 1984 | 46 / 63 |
| May | 13.5°C | 2.3°C | 26.3°C21 May 2024 | −16.4°C4 May 2005 | 47 / 63 |
| June | 19.2°C | 9.3°C | 31.6°C20 June 2005 | −6.9°C1 June 2006 | 46 / 62 |
| July | 21.0°C | 10.3°C | 35.6°C25 July 2000 | −0.4°C6 July 2011 | 49 / 61 |
| August | 19.1°C | 9.2°C | 33.9°C5 August 1970 | −4.4°C31 August 1996 | 49 / 61 |
| September | 13.4°C | 3.5°C | 28.0°C7 September 1980 | −17.2°C30 September 1969 | 45 / 63 |
| October | 5.5°C | −8.9°C | 19.0°C1 October 1977 | −26.1°C29 October 1987 | 45 / 60 |
| November | −3.0°C | −14.5°C | 11.9°C4 November 2016 | −35.0°C28 November 1970 | 41 / 60 |
| December | −8.7°C | −20.8°C | 6.5°C12 December 2002 | −38.4°C28 December 2018 | 43 / 60 |
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 38 to 49 years each.
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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.