Onega weather by month
Averages and records for each calendar month at Onega, Russia, from 1936 to 2025. The warmest month is July, averaging 21.8°C; the coolest is January at −8.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −8.5°C | −15.4°C | 6.1°C25 January 1973 | −42.1°C9 January 1987 | 83 / 89 |
| February | −7.3°C | −14.3°C | 5.3°C25 February 2014 | −42.5°C8 February 1946 | 83 / 88 |
| March | −1.7°C | −10.1°C | 13.4°C29 March 2007 | −38.5°C14 March 1957 | 84 / 89 |
| April | 5.3°C | −3.3°C | 25.9°C28 April 2001 | −26.0°C1 April 1952 | 86 / 88 |
| May | 12.5°C | 2.7°C | 32.5°C19 May 2021 | −14.6°C3 May 1941 | 83 / 88 |
| June | 18.7°C | 8.5°C | 33.2°C23 June 2021 | −3.4°C3 June 1978 | 83 / 88 |
| July | 21.8°C | 11.8°C | 35.8°C9 July 1972 | −0.4°C18 July 1941 | 82 / 88 |
| August | 19.1°C | 10.0°C | 34.4°C9 August 2010 | −3.0°C30 August 1966 | 84 / 86 |
| September | 12.6°C | 5.6°C | 27.4°C1 September 1963 | −4.9°C28 September 1996 | 83 / 86 |
| October | 5.1°C | 0.3°C | 19.8°C2 October 2005 | −19.3°C28 October 1968 | 84 / 87 |
| November | −1.1°C | −5.7°C | 11.1°C6 November 1957 | −31.5°C30 November 1968 | 82 / 87 |
| December | −5.4°C | −11.4°C | 7.7°C10 December 2006 | −41.2°C30 December 1978 | 82 / 88 |
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 82 to 86 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.