Bayan-Ovoo weather by month
Averages and records for each calendar month at Bayan-Ovoo, Mongolia, from 1969 to 2026. The warmest month is July, averaging 26.5°C; the coolest is January at −15.6°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −15.6°C | −23.8°C | 1.9°C22 January 2019 | −41.0°C25 January 1990 | 27 / 41 |
| February | −10.3°C | −22.1°C | 8.0°C28 February 1998 | −40.2°C4 February 2001 | 25 / 40 |
| March | 0.5°C | −12.2°C | 22.3°C25 March 2018 | −37.2°C5 March 1971 | 33 / 41 |
| April | 11.5°C | −1.9°C | 30.5°C30 April 2003 | −22.2°C2 April 1971 | 29 / 41 |
| May | 19.3°C | 4.8°C | 34.9°C26 May 2017 | −10.4°C2 May 2014 | 37 / 41 |
| June | 24.5°C | 10.6°C | 39.7°C25 June 2010 | −2.8°C1 June 1971 | 32 / 41 |
| July | 26.5°C | 15.6°C | 40.2°C24 July 2010 | 1.1°C3 July 1988 | 30 / 38 |
| August | 24.1°C | 12.4°C | 37.9°C3 August 2016 | −4.0°C29 August 2017 | 27 / 40 |
| September | 18.7°C | 5.1°C | 34.1°C6 September 2023 | −12.0°C29 September 2011 | 27 / 40 |
| October | 9.0°C | −6.5°C | 25.8°C4 October 1987 | −25.0°C30 October 1996 | 31 / 40 |
| November | −4.1°C | −12.1°C | 15.6°C1 November 1989 | −34.8°C30 November 1998 | 25 / 40 |
| December | −13.4°C | −22.0°C | 3.6°C1 December 2018 | −38.0°C26 December 1986 | 25 / 40 |
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 25 to 37 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.