Kostroma weather by month
Averages and records for each calendar month at Kostroma, Russia, from 1925 to 2025. The warmest month is July, averaging 23.5°C; the coolest is January at −7.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −7.7°C | −14.0°C | 6.6°C11 January 2007 | −46.4°C17 January 1940 | 95 / 99 |
| February | −6.6°C | −13.5°C | 7.2°C18 February 2020 | −39.3°C6 February 1929 | 94 / 100 |
| March | −0.4°C | −8.0°C | 17.9°C30 March 2007 | −31.1°C7 March 1955 | 97 / 98 |
| April | 8.6°C | 0.0°C | 27.6°C24 April 1950 | −19.0°C1 April 1963 | 96 / 97 |
| May | 17.1°C | 6.6°C | 32.5°C27 May 2015 | −5.5°C1 May 1935 | 95 / 96 |
| June | 21.1°C | 10.8°C | 32.9°C27 June 2013 | −2.7°C2 June 1930 | 95 / 95 |
| July | 23.5°C | 13.4°C | 37.1°C29 July 2010 | 3.2°C7 July 2015 | 94 / 95 |
| August | 21.5°C | 11.7°C | 37.3°C3 August 1936 | 1.3°C24 August 2015 | 94 / 95 |
| September | 14.9°C | 6.7°C | 30.2°C7 September 1938 | −5.8°C29 September 1996 | 94 / 94 |
| October | 6.7°C | 1.0°C | 22.9°C6 October 1999 | −18.5°C29 October 1968 | 94 / 97 |
| November | −0.5°C | −5.1°C | 13.8°C6 November 2013 | −28.8°C29 November 1984 | 94 / 97 |
| December | −5.3°C | −10.9°C | 9.4°C6 December 2008 | −44.4°C31 December 1978 | 94 / 97 |
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 94 to 97 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.