United States · 1991–2020

Best time to visit
Castroville.

September leads for comfortable weather in Castroville: typically 23.9°C by day, 11.9°C at night, with 2 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.9°C

Typical low11.9°C

Rain in September2 mm

Comfort

September

September · August · July

94climate match

Beach

September

September · August · July

59climate match

Outdoors

May

May · April · June

98climate match

The weakest month is December, scoring 50 against September’s 94 — days reach only 17.1°C, 7° below the 24°C the score treats as ideal, and nights drop to 4.9°C.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

5117.6° / 5.3°

Feb

5518.1° / 6.2°

Mar

6319.4° / 6.9°

Apr

7219.8° / 7.6°

May

7920.4° / 9.6°

Jun

8421.4° / 11.1°

Jul

8921.9° / 12.5°

Aug

9222.7° / 12.8°

Sep

9423.9° / 11.9°

Oct

8923.5° / 9.7°

Nov

7120.2° / 6.9°

Dec

5017.1° / 4.9°

Monthly climate evidence for Castroville — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 16 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	17.6°C	5.3°C	78 mm	7.4	12.6°C	9 h 54	51	Strong coverage
February	18.1°C	6.2°C	73 mm	8.2	12.6°C	10 h 47	55	Strong coverage
March	19.4°C	6.9°C	59 mm	6.6	12.5°C	11 h 51	63	Strong coverage
April	19.8°C	7.6°C	28 mm	4.5	12.0°C	13 h 05	72	Strong coverage
May	20.4°C	9.6°C	10 mm	1.8	12.0°C	14 h 06	79	Strong coverage
June	21.4°C	11.1°C	2 mm	0.6	12.6°C	14 h 40	84	Strong coverage
July	21.9°C	12.5°C	0 mm	0	13.7°C	14 h 27	89	Strong coverage
August	22.7°C	12.8°C	1 mm	0.3	14.4°C	13 h 34	92	Strong coverage
September	23.9°C	11.9°C	2 mm	0.5	14.6°C	12 h 22	94	Strong coverage
October	23.5°C	9.7°C	17 mm	2.2	14.3°C	11 h 11	89	Strong coverage
November	20.2°C	6.9°C	39 mm	4.8	13.6°C	10 h 09	71	Strong coverage
December	17.1°C	4.9°C	70 mm	7.9	12.9°C	9 h 39	50	Strong coverage

Records at SALINAS #2, 1958–2018
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	30.6°C17 Jan 2014	-5.6°C13 Jan 2007	75 mm23 Jan 2000	217 mm1969 · driest 0 mm in 2015	60
February	30.0°C16 Feb 2016	-3.9°C27 Feb 1962	61 mm13 Feb 1987	282 mm1998 · driest 3 mm in 1964	60
March	32.2°C14 Mar 2015	-3.9°C1 Mar 1977	53 mm28 Mar 1974	175 mm1983 · driest 2 mm in 1972	59
April	37.8°C26 Apr 2004	-1.1°C1 Apr 1964	53 mm1 Apr 1974	145 mm1967 · driest 0 mm in 1970	59
May	37.2°C12 May 1976	1.7°C23 May 1962	22 mm16 May 1996	59 mm1998 · driest 0 mm in 1985	59
June	37.2°C14 Jun 2000	5.0°C11 Jun 1958	12 mm16 Jun 1995	15 mm1995 · driest 0 mm in 1968	57
July	35.0°C29 Jul 1977	6.1°C19 Jul 1996	17 mm2 Jul 1980	17 mm1980 · driest 0 mm in 1967	60
August	38.9°C29 Aug 1968	5.6°C26 Aug 1963	14 mm19 Aug 1976	23 mm1976 · driest 0 mm in 1973	58
September	41.7°C2 Sep 2017	2.8°C17 Sep 1964	66 mm19 Sep 1959	115 mm1959 · driest 0 mm in 1985	60
October	40.6°C5 Oct 1987	1.1°C29 Oct 1971	38 mm17 Oct 2011	67 mm2004 · driest 0 mm in 1965	60
November	34.4°C2 Nov 1997	-2.8°C29 Nov 2004	63 mm30 Nov 2012	123 mm1997 · driest 0 mm in 1986	60
December	33.3°C3 Dec 1958	-4.4°C9 Dec 1972	75 mm17 Dec 1977	189 mm2014 · driest 1 mm in 2011	58

Typical days per month at SALINAS #2, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	2	<1	2	3
February	2	0	<1	3
March	3	<1	<1	2
April	3	<1	0	<1
May	3	<1	0	<1
June	3	<1	0	0
July	3	<1	0	0
August	5	<1	0	0
September	8	3	0	0
October	10	4	0	<1
November	4	<1	<1	1
December	<1	0	4	2

How often, not how much — every day in SALINAS #2’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	23%	21%	8%	24%	15.2–19.6°C
February	28%	25%	8%	29%	15.9–19.8°C
March	34%	20%	7%	19%	16.3–21.2°C
April	37%	14%	3%	11%	18.0–21.1°C
May	45%	5%	<1%	2%	18.2–22.1°C
June	67%	2%	<1%	<1%	19.7–22.7°C
July	82%	<1%	<1%	0%	20.6–23.1°C
August	90%	1%	<1%	<1%	21.3–24.0°C
September	88%	2%	<1%	<1%	21.9–26.6°C
October	74%	6%	2%	3%	21.7–25.4°C
November	46%	16%	5%	17%	17.7–21.8°C
December	23%	21%	6%	24%	15.3–19.4°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1959Each stripe is one year’s mean temperature against the 49-year average. Warmest: 2003. Coolest: 1964.2017

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5334937
NOAA station: USC00047668 · SALINAS #2
Station distance: 14.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 36.77°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 16 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from SALINAS #2 is what differs

Salinas→Prunedale→Boronda→Spreckels→Ambler Park→Confederate Corners→

Or put two places side by side: Castroville vs Salinas

Best time to visitCastroville.

September

September

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Castroville.

The whole year,
without the guesswork.

Nearby, measured,
and named.