Glasgow Intl Arpt climate by month
Averages and records for each calendar month at Glasgow Intl Arpt, United States, from 1948 to 2026. The warmest month is July, averaging 29.8°C; the coolest is January at −5.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −5.8°C | −16.5°C | 16.1°C8 January 2002 | −45.6°C26 January 1950 | 79 / 79 |
| February | −2.6°C | −13.8°C | 21.7°C27 February 1992 | −38.9°C2 February 1996 | 79 / 79 |
| March | 4.5°C | −7.5°C | 26.1°C23 March 1993 | −33.9°C6 March 1951 | 79 / 79 |
| April | 13.5°C | −0.4°C | 33.9°C26 April 1952 | −20.0°C2 April 1954 | 79 / 79 |
| May | 20.0°C | 5.8°C | 38.9°C18 May 1948 | −8.3°C3 May 1954 | 79 / 79 |
| June | 25.0°C | 10.8°C | 42.2°C5 June 1988 | −1.1°C1 June 1951 | 79 / 79 |
| July | 29.8°C | 14.1°C | 43.3°C19 July 2021 | 5.0°C6 July 1958 | 79 / 79 |
| August | 29.1°C | 13.2°C | 42.2°C6 August 1949 | 0.6°C19 August 1950 | 79 / 79 |
| September | 22.4°C | 7.3°C | 41.1°C7 September 2022 | −9.4°C21 September 1995 | 78 / 79 |
| October | 14.6°C | 0.6°C | 33.3°C10 October 1955 | −21.1°C30 October 1991 | 78 / 78 |
| November | 4.5°C | −7.1°C | 26.1°C12 November 1999 | −32.2°C23 November 1985 | 78 / 78 |
| December | −3.0°C | −13.8°C | 20.6°C1 December 2021 | −38.9°C9 December 1977 | 78 / 78 |
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 78 to 79 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.