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Saint Andrews, South Carolina climate

Cfa Humid subtropical

Saint Andrews has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 93°F, while the coldest is January averaging around 35°F at night. Precipitation is fairly even year-round, totalling about 45 inches. Snow is occasional (1 inches of snow per year on average).

☀️ Summers

Hot

Highs near 93°F in July.

About 81 days a year above 90 °F

❄️ Winters

Chilly

Lows near 35°F in January.

About 47 freezing nights a year

🌧️ Rain

Wet

About 45 in of rain a year.

Wettest in July

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+0.8 °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

Saint Andrews climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	57	61	68	77	84	90	93	91	86	77	66	59
Avg temp (°F)	46	49	56	64	72	79	82	81	76	65	54	48
Avg low (°F)	35	37	44	52	61	69	72	71	65	53	42	37
Precipitation (in)	3.5	3.4	3.6	2.8	3.5	5.0	5.4	4.7	3.9	3.1	2.8	3.7
Snowfall (in)	0.6	0.4	0.1	—	—	—	—	—	—	—	—	0.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	57	61	68	77	84	90
Avg temp (°F)	46	49	56	64	72	79
Avg low (°F)	35	37	44	52	61	69
Precipitation (in)	3.5	3.4	3.6	2.8	3.5	5.0
Snowfall (in)	0.6	0.4	0.1	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	93	91	86	77	66	59
Avg temp (°F)	82	81	76	65	54	48
Avg low (°F)	72	71	65	53	42	37
Precipitation (in)	5.4	4.7	3.9	3.1	2.8	3.7
Snowfall (in)	—	—	—	—	—	0.1

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	9	9	8	9	11	12	10	8	7	7	9
Days with high ≥ 90°F (days)	—	—	—	1	7	17	24	20	10	0.6	—	—
Days with low ≤ 32°F (days)	14	9	4	0.5	—	—	—	—	—	0.5	6	12
Days with snowfall ≥ 1 in (days)	0.2	0.1	0.0	—	—	—	—	—	—	—	—	0.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	10	9	9	8	9	11
Days with high ≥ 90°F (days)	—	—	—	1	7	17
Days with low ≤ 32°F (days)	14	9	4	0.5	—	—
Days with snowfall ≥ 1 in (days)	0.2	0.1	0.0	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	12	10	8	7	7	9
Days with high ≥ 90°F (days)	24	20	10	0.6	—	—
Days with low ≤ 32°F (days)	—	—	—	0.5	6	12
Days with snowfall ≥ 1 in (days)	—	—	—	—	—	0.1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	56	59	54	51	53	55	56	57	50	44	47	55
Clear days (≤ 30% cloud)	9	7	9	10	9	7	6	7	10	13	12	9
Partly cloudy days (30–70%)	9	9	10	9	12	12	15	13	10	8	9	9
Cloudy days (≥ 70%)	13	13	12	11	11	10	10	11	10	9	10	13
Relative humidity (%)	81	81	79	75	71	70	69	71	72	73	74	80
Wind speed (mph)	3.2	3.4	3.6	3.6	3.2	2.9	2.8	2.7	3.0	3.0	3.0	3.0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	56	59	54	51	53	55
Clear days (≤ 30% cloud)	9	7	9	10	9	7
Partly cloudy days (30–70%)	9	9	10	9	12	12
Cloudy days (≥ 70%)	13	13	12	11	11	10
Relative humidity (%)	81	81	79	75	71	70
Wind speed (mph)	3.2	3.4	3.6	3.6	3.2	2.9

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	56	57	50	44	47	55
Clear days (≤ 30% cloud)	6	7	10	13	12	9
Partly cloudy days (30–70%)	15	13	10	8	9	9
Cloudy days (≥ 70%)	10	11	10	9	10	13
Relative humidity (%)	69	71	72	73	74	80
Wind speed (mph)	2.8	2.7	3.0	3.0	3.0	3.0

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Columbia (NOAA GHCN station USW00013883), about 11 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 →