Valley climate by month
Averages and records for each calendar month at Valley, United Kingdom, from 1930 to 2026. The warmest month is August, averaging 18.6°C; the coolest is January at 8.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 8.0°C | 3.4°C | 14.8°C10 January 1971 | −12.2°C26 January 1945 | 95 / 96 |
| February | 8.0°C | 3.1°C | 18.8°C25 February 2019 | −12.2°C2 February 1956 | 95 / 96 |
| March | 9.6°C | 4.0°C | 20.6°C23 March 1945 | −8.3°C10 March 1958 | 96 / 96 |
| April | 11.7°C | 5.6°C | 24.3°C29 April 2026 | −2.8°C1 April 1955 | 96 / 96 |
| May | 14.7°C | 8.1°C | 29.2°C26 May 2026 | −0.3°C7 May 1982 | 96 / 96 |
| June | 17.0°C | 10.7°C | 30.6°C6 June 1950 | 1.2°C1 June 1962 | 96 / 96 |
| July | 18.5°C | 12.5°C | 30.5°C11 July 2025 | 3.9°C6 July 1954 | 96 / 96 |
| August | 18.6°C | 12.7°C | 29.7°C11 August 2022 | 5.0°C31 August 1986 | 96 / 96 |
| September | 17.0°C | 11.3°C | 28.2°C4 September 2005 | 1.8°C19 September 1986 | 95 / 95 |
| October | 14.2°C | 9.0°C | 25.0°C4 October 1959 | −1.7°C30 October 2018 | 94 / 95 |
| November | 11.0°C | 6.1°C | 18.8°C12 November 2022 | −5.0°C29 November 2010 | 94 / 95 |
| December | 9.0°C | 4.3°C | 15.6°C18 December 1972 | −9.3°C25 December 2010 | 95 / 96 |
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 96 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.