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Compton, California climate

BSh Hot semi-arid

Compton has a mildly seasonal mild-temperate climate (Hot semi-arid, Köppen BSh). The hottest month is August with an average daily high near 79°F, while the coldest is December averaging around 49°F at night. Precipitation totals about 12 inches a year and is strongly seasonal — February alone averages 3.0 inches while June barely receives 0.00 inches.

☀️ Summers

Warm

Highs near 79°F in August.

About 9 days a year above 90 °F

❄️ Winters

Cool

Lows near 49°F in December.

🌧️ Rain

Fairly dry

About 12 in of rain a year.

Wettest in February

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+0.4 °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

Compton climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	67	67	68	70	71	73	77	79	79	76	72	66
Avg temp (°F)	58	59	60	62	65	67	71	72	72	68	63	58
Avg low (°F)	49	51	53	55	58	62	65	65	65	60	54	49
Precipitation (in)	2.7	3.0	1.7	0.6	0.3	0.0	0.0	0.0	0.2	0.5	0.7	2.2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	67	67	68	70	71	73
Avg temp (°F)	58	59	60	62	65	67
Avg low (°F)	49	51	53	55	58	62
Precipitation (in)	2.7	3.0	1.7	0.6	0.3	0.0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	77	79	79	76	72	66
Avg temp (°F)	71	72	72	68	63	58
Avg low (°F)	65	65	65	60	54	49
Precipitation (in)	0.0	0.0	0.2	0.5	0.7	2.2

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	6	7	5	3	2	0.2	0.3	0.1	0.6	2	5	6
Days with high ≥ 90°F (days)	0.0	0.1	0.4	0.5	0.6	0.3	0.5	0.8	2	3	1.0	—
Days with low ≤ 32°F (days)	—	—	—	—	—	0.0	—	—	—	—	—	—

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	6	7	5	3	2	0.2
Days with high ≥ 90°F (days)	0.0	0.1	0.4	0.5	0.6	0.3
Days with low ≤ 32°F (days)	—	—	—	—	—	0.0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	0.3	0.1	0.6	2	5	6
Days with high ≥ 90°F (days)	0.5	0.8	2	3	1.0	—
Days with low ≤ 32°F (days)	—	—	—	—	—	—

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	53	54	54	48	55	62	60	51	48	48	44	48
Clear days (≤ 30% cloud)	10	9	9	11	8	5	5	8	10	12	12	12
Partly cloudy days (30–70%)	10	8	11	11	12	10	14	14	11	9	10	9
Cloudy days (≥ 70%)	11	11	11	9	11	14	13	9	9	10	8	10
Relative humidity (%)	61	65	66	63	63	58	53	49	50	52	52	58
Wind speed (mph)	5.3	5.1	4.8	5.0	4.7	4.3	4.0	3.9	3.9	4.2	4.8	5.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	53	54	54	48	55	62
Clear days (≤ 30% cloud)	10	9	9	11	8	5
Partly cloudy days (30–70%)	10	8	11	11	12	10
Cloudy days (≥ 70%)	11	11	11	9	11	14
Relative humidity (%)	61	65	66	63	63	58
Wind speed (mph)	5.3	5.1	4.8	5.0	4.7	4.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	60	51	48	48	44	48
Clear days (≤ 30% cloud)	5	8	10	12	12	12
Partly cloudy days (30–70%)	14	14	11	9	10	9
Cloudy days (≥ 70%)	13	9	9	10	8	10
Relative humidity (%)	53	49	50	52	52	58
Wind speed (mph)	4.0	3.9	3.9	4.2	4.8	5.4

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Hawthorne Muni AP (NOAA GHCN station USW00003167), 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 →