Sejmchan climate by month
Averages and records for each calendar month at Sejmchan, Russia, from 1936 to 2025. The warmest month is July, averaging 23.1°C; the coolest is January at −33.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −33.3°C | −41.3°C | −5.9°C30 January 2010 | −59.1°C22 January 1972 | 81 / 87 |
| February | −27.7°C | −38.9°C | −7.0°C18 February 1995 | −58.2°C1 February 1946 | 85 / 87 |
| March | −16.2°C | −32.5°C | 8.7°C23 March 2009 | −53.4°C2 March 1951 | 87 / 87 |
| April | −3.1°C | −18.2°C | 12.7°C29 April 2013 | −44.7°C2 April 1950 | 87 / 87 |
| May | 10.0°C | −1.9°C | 30.7°C30 May 2025 | −27.9°C3 May 1938 | 85 / 87 |
| June | 20.9°C | 6.3°C | 35.2°C22 June 1949 | −6.4°C1 June 1982 | 86 / 86 |
| July | 23.1°C | 8.8°C | 36.1°C29 July 2011 | −4.2°C10 July 1957 | 86 / 86 |
| August | 19.2°C | 5.3°C | 35.9°C2 August 2011 | −9.0°C24 August 1943 | 85 / 86 |
| September | 10.6°C | −1.4°C | 27.8°C4 September 1970 | −19.6°C29 September 1964 | 85 / 85 |
| October | −5.1°C | −15.6°C | 16.7°C2 October 1963 | −40.1°C27 October 1957 | 85 / 85 |
| November | −23.1°C | −31.9°C | 6.7°C16 November 2006 | −53.6°C19 November 1952 | 79 / 85 |
| December | −32.5°C | −40.1°C | 0.9°C1 December 1994 | −56.6°C31 December 1964 | 79 / 85 |
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 79 to 87 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.