MCCARRAN INTERNATIONAL AIRPORT climate by month
Averages and records for each calendar month at MCCARRAN INTERNATIONAL AIRPORT, United States, from 1948 to 2026. The warmest month is July, averaging 40.3°C; the coolest is January at 14.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 14.0°C | 2.3°C | 25.0°C26 January 1975 | −13.3°C13 January 1963 | 78 / 78 |
| February | 17.1°C | 4.7°C | 30.6°C26 February 1986 | −8.9°C7 February 1989 | 78 / 78 |
| March | 21.0°C | 7.9°C | 36.7°C25 March 2026 | −5.0°C1 March 1962 | 78 / 78 |
| April | 25.8°C | 11.9°C | 37.2°C30 April 1981 | −0.6°C3 April 1955 | 78 / 78 |
| May | 31.2°C | 16.9°C | 42.8°C26 May 1951 | 4.4°C5 May 1950 | 78 / 78 |
| June | 37.4°C | 22.3°C | 47.2°C30 June 2013 | 8.9°C6 June 1993 | 78 / 78 |
| July | 40.3°C | 25.9°C | 48.9°C7 July 2024 | 15.6°C19 July 1987 | 78 / 78 |
| August | 39.1°C | 24.9°C | 46.7°C1 August 1979 | 13.3°C24 August 1968 | 78 / 78 |
| September | 34.8°C | 20.3°C | 45.6°C6 September 2020 | 6.1°C27 September 1948 | 78 / 79 |
| October | 27.5°C | 13.4°C | 40.0°C4 October 2024 | −3.3°C30 October 1971 | 78 / 78 |
| November | 19.3°C | 6.6°C | 30.6°C1 November 1988 | −6.1°C29 November 1948 | 78 / 78 |
| December | 14.1°C | 2.4°C | 25.0°C3 December 1980 | −11.7°C23 December 1990 | 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 78 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.