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Monterey, California climate

Csb Warm-summer Mediterranean

Monterey has a mildly seasonal mild-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is September with an average daily high near 75°F, while the coldest is December averaging around 40°F at night. Precipitation totals about 15 inches a year and is strongly seasonal — January alone averages 3.3 inches while July barely receives 0.01 inches.

☀️ Summers

Mild

Highs near 75°F in September.

About 6 days a year above 90 °F

❄️ Winters

Cool

Lows near 40°F in December.

About 7 freezing nights a year

🌧️ Rain

Fairly dry

About 15 in of rain a year.

Wettest in January

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

−0.2 °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

Monterey climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	63	64	66	67	68	70	71	73	75	74	68	62
Avg temp (°F)	52	53	55	56	58	61	62	63	64	62	56	51
Avg low (°F)	41	42	44	45	49	51	54	54	53	49	43	40
Precipitation (in)	3.3	3.0	2.5	1.1	0.5	0.1	0.0	0.0	0.1	0.6	1.6	2.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	63	64	66	67	68	70
Avg temp (°F)	52	53	55	56	58	61
Avg low (°F)	41	42	44	45	49	51
Precipitation (in)	3.3	3.0	2.5	1.1	0.5	0.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	71	73	75	74	68	62
Avg temp (°F)	62	63	64	62	56	51
Avg low (°F)	54	54	53	49	43	40
Precipitation (in)	0.0	0.0	0.1	0.6	1.6	2.8

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	9	9	8	6	3	1.0	0.4	0.9	0.9	3	6	8
Days with high ≥ 90°F (days)	—	—	0.0	0.5	0.5	0.5	0.2	0.5	1	2	0.1	—
Days with low ≤ 32°F (days)	2	0.8	0.1	0.0	—	—	—	—	—	—	0.5	3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	9	9	8	6	3	1.0
Days with high ≥ 90°F (days)	—	—	0.0	0.5	0.5	0.5
Days with low ≤ 32°F (days)	2	0.8	0.1	0.0	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	0.4	0.9	0.9	3	6	8
Days with high ≥ 90°F (days)	0.2	0.5	1	2	0.1	—
Days with low ≤ 32°F (days)	—	—	—	—	0.5	3

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	50	51	48	43	39	33	35	33	30	31	39	48
Clear days (≤ 30% cloud)	10	9	11	12	13	16	13	15	17	18	14	11
Partly cloudy days (30–70%)	10	9	10	11	13	11	16	14	11	9	9	10
Cloudy days (≥ 70%)	11	10	10	7	5	3	2	2	2	4	7	10
Relative humidity (%)	81	83	84	83	83	82	83	83	80	77	78	79
Wind speed (mph)	5.5	6.1	5.8	6.1	5.7	5.4	4.6	4.6	4.5	4.7	5.3	5.9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	50	51	48	43	39	33
Clear days (≤ 30% cloud)	10	9	11	12	13	16
Partly cloudy days (30–70%)	10	9	10	11	13	11
Cloudy days (≥ 70%)	11	10	10	7	5	3
Relative humidity (%)	81	83	84	83	83	82
Wind speed (mph)	5.5	6.1	5.8	6.1	5.7	5.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	35	33	30	31	39	48
Clear days (≤ 30% cloud)	13	15	17	18	14	11
Partly cloudy days (30–70%)	16	14	11	9	9	10
Cloudy days (≥ 70%)	2	2	2	4	7	10
Relative humidity (%)	83	83	80	77	78	79
Wind speed (mph)	4.6	4.6	4.5	4.7	5.3	5.9

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Salinas #2 (NOAA GHCN station USC00047668), about 21 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 →