Mackinac Isl Arpt climate by month
Averages and records for each calendar month at Mackinac Isl Arpt, United States, from 1900 to 1938. The warmest month is July, averaging 24.1°C; the coolest is February at −3.6°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −3.0°C | −11.9°C | 15.6°C6 January 1933 | −31.7°C26 January 1927 | 35 / 36 |
| February | −3.6°C | −13.7°C | 12.8°C19 February 1930 | −32.8°C8 February 1934 | 31 / 35 |
| March | 1.4°C | −8.6°C | 18.9°C26 March 1925 | −26.7°C3 March 1938 | 34 / 34 |
| April | 8.2°C | −1.6°C | 25.6°C4 April 1921 | −17.8°C9 April 1923 | 34 / 36 |
| May | 14.7°C | 3.8°C | 28.9°C30 May 1919 | −6.7°C2 May 1911 | 36 / 38 |
| June | 20.3°C | 9.0°C | 32.2°C30 June 1931 | −2.2°C19 June 1902 | 37 / 38 |
| July | 24.1°C | 13.2°C | 37.2°C4 July 1911 | 3.3°C4 July 1922 | 37 / 37 |
| August | 23.2°C | 12.9°C | 35.6°C9 August 1914 | 2.2°C27 August 1915 | 35 / 35 |
| September | 19.2°C | 9.3°C | 32.2°C14 September 1915 | −1.7°C21 September 1904 | 35 / 37 |
| October | 12.6°C | 3.9°C | 26.7°C9 October 1905 | −9.4°C27 October 1936 | 35 / 37 |
| November | 5.6°C | −1.9°C | 21.7°C3 November 1938 | −20.6°C29 November 1929 | 35 / 37 |
| December | −0.8°C | −7.9°C | 12.8°C11 December 1911 | −26.1°C17 December 1919 | 33 / 36 |
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 31 to 37 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.