Tromsø Arpt climate by month
Averages and records for each calendar month at Tromsø Arpt, Norway, from 1964 to 2026. The warmest month is July, averaging 15.5°C; the coolest is January at −0.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −0.9°C | −6.1°C | 8.5°C4 January 1993 | −20.1°C9 January 1987 | 61 / 62 |
| February | −0.8°C | −6.0°C | 8.4°C23 February 2025 | −20.1°C16 February 1985 | 61 / 62 |
| March | 0.7°C | −4.6°C | 9.3°C23 March 2025 | −17.7°C15 March 1978 | 62 / 62 |
| April | 3.6°C | −1.8°C | 16.1°C28 April 2002 | −14.5°C6 April 1969 | 62 / 62 |
| May | 8.3°C | 2.5°C | 25.2°C30 May 2024 | −7.5°C1 May 1976 | 62 / 62 |
| June | 12.7°C | 6.7°C | 30.2°C28 June 2022 | −0.4°C1 June 2023 | 62 / 62 |
| July | 15.5°C | 9.2°C | 29.0°C1 July 1972 | 1.4°C3 July 1965 | 62 / 62 |
| August | 14.4°C | 8.2°C | 26.1°C2 August 1994 | −0.3°C25 August 1984 | 62 / 62 |
| September | 10.4°C | 4.9°C | 22.5°C9 September 2024 | −7.4°C27 September 1986 | 61 / 61 |
| October | 5.4°C | 0.8°C | 16.8°C4 October 2021 | −13.0°C23 October 1968 | 62 / 62 |
| November | 2.1°C | −2.6°C | 11.9°C7 November 2003 | −15.4°C29 November 1988 | 62 / 62 |
| December | 0.3°C | −4.7°C | 9.9°C1 December 1984 | −19.0°C29 December 1978 | 62 / 62 |
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 61 to 62 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.