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Myrtle Beach, South Carolina climate
Cfa Humid subtropical
Myrtle Beach has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 33°C, while the coldest is January averaging around 2°C at night. Around 1402 mm of precipitation falls each year, peaking in August (198 mm) and easing off in April (80 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsMyrtle Beach climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 15 | 16 | 20 | 24 | 28 | 31 | 33 | 32 | 29 | 25 | 20 | 16 |
| Avg temp (°C) | 8 | 10 | 13 | 18 | 22 | 26 | 28 | 27 | 24 | 19 | 13 | 10 |
| Avg low (°C) | 2 | 3 | 6 | 11 | 16 | 20 | 22 | 22 | 19 | 13 | 7 | 4 |
| Precipitation (mm) | 109 | 91 | 96 | 80 | 85 | 136 | 175 | 198 | 152 | 97 | 82 | 102 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 15 | 16 | 20 | 24 | 28 | 31 |
| Avg temp (°C) | 8 | 10 | 13 | 18 | 22 | 26 |
| Avg low (°C) | 2 | 3 | 6 | 11 | 16 | 20 |
| Precipitation (mm) | 109 | 91 | 96 | 80 | 85 | 136 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 33 | 32 | 29 | 25 | 20 | 16 |
| Avg temp (°C) | 28 | 27 | 24 | 19 | 13 | 10 |
| Avg low (°C) | 22 | 22 | 19 | 13 | 7 | 4 |
| Precipitation (mm) | 175 | 198 | 152 | 97 | 82 | 102 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 7 | 8 | 7 | 7 | 10 | 10 | 11 | 8 | 6 | 6 | 8 |
| Days with high ≥ 32°C (days) | — | — | — | 0.7 | 4 | 11 | 18 | 14 | 5 | 0.5 | — | — |
| Days with low ≤ 0°C (days) | 13 | 8 | 3 | 0.1 | — | — | — | — | 0.0 | 0.0 | 3 | 9 |
| Days with snowfall ≥ 2.5 cm (days) | 0.0 | 0.0 | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 7 | 8 | 7 | 7 | 10 |
| Days with high ≥ 32°C (days) | — | — | — | 0.7 | 4 | 11 |
| Days with low ≤ 0°C (days) | 13 | 8 | 3 | 0.1 | — | — |
| Days with snowfall ≥ 2.5 cm (days) | 0.0 | 0.0 | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 11 | 8 | 6 | 6 | 8 |
| Days with high ≥ 32°C (days) | 18 | 14 | 5 | 0.5 | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.0 | 0.0 | 3 | 9 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | — |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 60 | 55 | 50 | 52 | 56 | 55 | 57 | 54 | 45 | 48 | 56 |
| Clear days (≤ 30% cloud) | 8 | 7 | 8 | 10 | 10 | 7 | 6 | 7 | 9 | 13 | 11 | 9 |
| Partly cloudy days (30–70%) | 10 | 9 | 10 | 11 | 11 | 12 | 14 | 13 | 11 | 8 | 9 | 9 |
| Cloudy days (≥ 70%) | 13 | 13 | 12 | 9 | 10 | 11 | 11 | 12 | 11 | 10 | 10 | 13 |
| Relative humidity (%) | 83 | 82 | 80 | 78 | 75 | 76 | 77 | 79 | 80 | 79 | 80 | 83 |
| Wind speed (km/h) | 11.9 | 12.0 | 12.2 | 12.1 | 10.9 | 9.9 | 9.6 | 8.9 | 10.2 | 10.3 | 10.7 | 11.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 60 | 55 | 50 | 52 | 56 |
| Clear days (≤ 30% cloud) | 8 | 7 | 8 | 10 | 10 | 7 |
| Partly cloudy days (30–70%) | 10 | 9 | 10 | 11 | 11 | 12 |
| Cloudy days (≥ 70%) | 13 | 13 | 12 | 9 | 10 | 11 |
| Relative humidity (%) | 83 | 82 | 80 | 78 | 75 | 76 |
| Wind speed (km/h) | 11.9 | 12.0 | 12.2 | 12.1 | 10.9 | 9.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 57 | 54 | 45 | 48 | 56 |
| Clear days (≤ 30% cloud) | 6 | 7 | 9 | 13 | 11 | 9 |
| Partly cloudy days (30–70%) | 14 | 13 | 11 | 8 | 9 | 9 |
| Cloudy days (≥ 70%) | 11 | 12 | 11 | 10 | 10 | 13 |
| Relative humidity (%) | 77 | 79 | 80 | 79 | 80 | 83 |
| Wind speed (km/h) | 9.6 | 8.9 | 10.2 | 10.3 | 10.7 | 11.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Conway (NOAA GHCN station USC00381997), about 22 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.