Arvaiheer climate by month
Averages and records for each calendar month at Arvaiheer, Mongolia, from 1957 to 2026. The warmest month is July, averaging 22.7°C; the coolest is January at −8.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −8.8°C | −19.4°C | 6.8°C21 January 2019 | −36.1°C1 January 1969 | 55 / 63 |
| February | −6.0°C | −17.6°C | 12.2°C28 February 1963 | −31.7°C21 February 1969 | 52 / 64 |
| March | 1.0°C | −12.0°C | 18.9°C31 March 2002 | −27.7°C17 March 1976 | 56 / 65 |
| April | 9.6°C | −3.8°C | 28.2°C30 April 2020 | −22.6°C3 April 1969 | 55 / 65 |
| May | 16.4°C | 3.1°C | 30.4°C28 May 1996 | −13.9°C1 May 1958 | 57 / 64 |
| June | 21.2°C | 8.2°C | 34.0°C27 June 2017 | −3.9°C5 June 1961 | 56 / 64 |
| July | 22.7°C | 10.7°C | 35.5°C2 July 1998 | 1.3°C2 July 1988 | 55 / 64 |
| August | 21.0°C | 9.0°C | 33.1°C19 August 1983 | −1.1°C30 August 1972 | 55 / 64 |
| September | 15.9°C | 3.2°C | 29.9°C14 September 2003 | −10.1°C30 September 2004 | 55 / 65 |
| October | 8.1°C | −4.0°C | 22.0°C6 October 1998 | −20.1°C28 October 1976 | 54 / 63 |
| November | −0.7°C | −12.1°C | 15.9°C4 November 2016 | −29.3°C29 November 2022 | 54 / 63 |
| December | −6.8°C | −17.4°C | 13.8°C2 December 1989 | −31.7°C31 December 1976 | 54 / 64 |
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 52 to 57 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.