Zanjan climate by month
Averages and records for each calendar month at Zanjan, Iran, from 1973 to 2025. The warmest month is August, averaging 33.2°C; the coolest is January at 5.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 5.1°C | – | 16.9°C1 January 2018 | −26.0°C30 January 1974 | 24 / 39 |
| February | 7.8°C | – | 20.8°C27 February 2016 | −27.0°C4 February 1974 | 15 / 35 |
| March | 13.9°C | 0.8°C | 27.2°C29 March 2018 | −19.6°C2 March 1992 | 19 / 37 |
| April | 18.3°C | 4.8°C | 31.0°C21 April 1980 | −10.7°C4 April 2007 | 18 / 42 |
| May | 24.5°C | 8.4°C | 34.4°C31 May 2024 | −2.1°C18 May 2003 | 18 / 38 |
| June | 30.2°C | 12.1°C | 38.2°C29 June 2015 | 1.6°C14 June 2000 | 13 / 39 |
| July | 32.7°C | 15.7°C | 40.5°C10 July 2015 | 7.4°C13 July 1992 | 19 / 42 |
| August | 33.2°C | 14.8°C | 40.0°C14 August 1977 | 3.0°C23 August 2007 | 18 / 39 |
| September | 29.4°C | 10.5°C | 37.5°C4 September 2024 | 0.8°C30 September 2009 | 17 / 37 |
| October | 21.5°C | 5.5°C | 30.6°C9 October 2024 | −4.0°C24 October 2005 | 23 / 35 |
| November | 12.9°C | – | 28.0°C12 November 1974 | −15.2°C20 November 2001 | 17 / 37 |
| December | 8.0°C | – | 19.9°C3 December 2023 | −24.8°C31 December 2006 | 18 / 37 |
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 13 to 24 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.