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Paso Robles, California climate

Csa Hot-summer Mediterranean

Paso Robles has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is August with an average daily high near 92°F, while the coldest is December averaging around 33°F at night. Precipitation totals about 15 inches a year and is strongly seasonal — January alone averages 3.4 inches while August barely receives 0.02 inches.

☀️ Summers

Hot

Highs near 92°F in August.

About 78 days a year above 90 °F

❄️ Winters

Chilly

Lows near 33°F in December.

About 54 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.

+0.3 °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

Paso Robles climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	62	64	68	73	80	87	91	92	89	81	69	61
Avg temp (°F)	48	50	54	57	63	68	72	72	69	62	53	47
Avg low (°F)	34	37	40	41	46	50	53	53	50	43	37	33
Precipitation (in)	3.4	3.2	2.8	0.8	0.4	0.0	0.1	0.0	0.1	0.7	1.2	2.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	62	64	68	73	80	87
Avg temp (°F)	48	50	54	57	63	68
Avg low (°F)	34	37	40	41	46	50
Precipitation (in)	3.4	3.2	2.8	0.8	0.4	0.0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	91	92	89	81	69	61
Avg temp (°F)	72	72	69	62	53	47
Avg low (°F)	53	53	50	43	37	33
Precipitation (in)	0.1	0.0	0.1	0.7	1.2	2.5

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	8	9	8	4	2	0.5	0.3	0.2	0.7	2	4	8
Days with high ≥ 90°F (days)	—	—	0.2	1	5	12	17	20	16	6	0.3	—
Days with low ≤ 32°F (days)	14	9	3	1	—	—	—	—	—	0.7	8	18

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	8	9	8	4	2	0.5
Days with high ≥ 90°F (days)	—	—	0.2	1	5	12
Days with low ≤ 32°F (days)	14	9	3	1	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	0.3	0.2	0.7	2	4	8
Days with high ≥ 90°F (days)	17	20	16	6	0.3	—
Days with low ≤ 32°F (days)	—	—	—	0.7	8	18

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	51	49	46	37	32	24	21	20	22	27	38	49
Clear days (≤ 30% cloud)	11	10	12	14	18	22	25	26	23	21	14	11
Partly cloudy days (30–70%)	10	9	10	10	9	6	5	4	6	6	9	11
Cloudy days (≥ 70%)	11	10	9	5	4	2	1	1.0	2	4	6	9
Relative humidity (%)	76	77	76	70	62	53	52	51	52	56	65	73
Wind speed (mph)	5.1	5.3	5.2	5.7	5.9	5.8	5.4	4.9	4.6	4.7	4.9	5.2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	51	49	46	37	32	24
Clear days (≤ 30% cloud)	11	10	12	14	18	22
Partly cloudy days (30–70%)	10	9	10	10	9	6
Cloudy days (≥ 70%)	11	10	9	5	4	2
Relative humidity (%)	76	77	76	70	62	53
Wind speed (mph)	5.1	5.3	5.2	5.7	5.9	5.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	21	20	22	27	38	49
Clear days (≤ 30% cloud)	25	26	23	21	14	11
Partly cloudy days (30–70%)	5	4	6	6	9	11
Cloudy days (≥ 70%)	1	1.0	2	4	6	9
Relative humidity (%)	52	51	52	56	65	73
Wind speed (mph)	5.4	4.9	4.6	4.7	4.9	5.2

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Paso Robles (NOAA GHCN station USC00046730), inside the city.

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 →