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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 91°F, while the coldest is January averaging around 35°F at night. Around 55 inches of precipitation falls each year, peaking in August (7.8 inches) and easing off in April (3.2 inches).

☀️ Summers

Hot

Highs near 91°F in July.

About 54 days a year above 90 °F

❄️ Winters

Chilly

Lows near 35°F in January.

About 36 freezing nights a year

🌧️ Rain

Wet

About 55 in of rain a year.

Wettest in August

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+0.5 °F vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Myrtle Beach climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	58	61	68	76	83	88	91	89	85	77	68	61
Avg temp (°F)	47	49	56	64	72	78	82	80	75	66	56	50
Avg low (°F)	35	38	44	52	61	69	72	71	66	55	44	39
Precipitation (in)	4.3	3.6	3.8	3.2	3.3	5.3	6.9	7.8	6.0	3.8	3.2	4.0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	58	61	68	76	83	88
Avg temp (°F)	47	49	56	64	72	78
Avg low (°F)	35	38	44	52	61	69
Precipitation (in)	4.3	3.6	3.8	3.2	3.3	5.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	91	89	85	77	68	61
Avg temp (°F)	82	80	75	66	56	50
Avg low (°F)	72	71	66	55	44	39
Precipitation (in)	6.9	7.8	6.0	3.8	3.2	4.0

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 ≥ 90°F (days)	—	—	—	0.7	4	11	18	14	5	0.5	—	—
Days with low ≤ 32°F (days)	13	8	3	0.1	—	—	—	—	0.0	0.0	3	9
Days with snowfall ≥ 1 in (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 ≥ 90°F (days)	—	—	—	0.7	4	11
Days with low ≤ 32°F (days)	13	8	3	0.1	—	—
Days with snowfall ≥ 1 in (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 ≥ 90°F (days)	18	14	5	0.5	—	—
Days with low ≤ 32°F (days)	—	—	0.0	0.0	3	9
Days with snowfall ≥ 1 in (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 (mph)	7.4	7.5	7.6	7.5	6.8	6.2	6.0	5.5	6.3	6.4	6.7	7.0

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 (mph)	7.4	7.5	7.6	7.5	6.8	6.2

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 (mph)	6.0	5.5	6.3	6.4	6.7	7.0

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.

How we build these numbers →