Myrtle Beach Intl climate by month
Averages and records for each calendar month at Myrtle Beach Intl, United States, from 1956 to 2026. The warmest month is July, averaging 30.4°C; the coolest is January at 11.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 11.8°C | 1.3°C | 26.1°C10 January 1957 | −10.6°C10 January 1970 | 16 / 16 |
| February | 13.4°C | 3.3°C | 28.3°C28 February 1962 | −12.8°C18 February 1958 | 16 / 16 |
| March | 16.9°C | 7.0°C | 31.1°C18 March 1963 | −6.1°C7 March 1960 | 16 / 16 |
| April | 21.9°C | 12.0°C | 33.3°C4 April 1963 | 0.6°C11 April 1966 | 16 / 16 |
| May | 25.7°C | 16.7°C | 33.9°C18 May 1960 | 2.2°C2 May 1963 | 16 / 16 |
| June | 28.6°C | 20.6°C | 37.8°C29 June 1959 | 10.0°C1 June 1966 | 16 / 16 |
| July | 30.4°C | 22.6°C | 37.2°C10 July 2026 | 15.0°C11 July 1963 | 16 / 16 |
| August | 29.8°C | 22.1°C | 36.1°C7 August 1968 | 15.6°C8 August 1957 | 16 / 16 |
| September | 27.5°C | 18.9°C | 35.0°C4 September 1961 | 7.2°C30 September 1967 | 15 / 16 |
| October | 23.0°C | 12.6°C | 32.8°C8 October 1962 | 0.0°C29 October 1957 | 15 / 15 |
| November | 18.6°C | 7.1°C | 27.2°C16 November 1958 | −7.8°C25 November 1970 | 15 / 16 |
| December | 14.2°C | 3.0°C | 25.6°C19 December 1967 | −11.7°C13 December 1962 | 16 / 16 |
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 15 to 16 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.