United States · 1991–2020

Best time to visit
San Joaquin Hills.

October leads for comfortable weather in San Joaquin Hills: typically 22°C by day, 15.8°C at night, with 9 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high22°C

Typical low15.8°C

Rain in October9 mm

Comfort

October

October · September · August

92climate match

Beach

August

August · September · July

75climate match

Outdoors

November

November · December · April

96climate match

The weakest month is February, scoring 64 against October’s 92 — days reach only 17.4°C, 7° below the 24°C the score treats as ideal.

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

6617.8° / 10.2°

Feb

6417.4° / 10.6°

Mar

7317.7° / 11.8°

Apr

7718.3° / 12.8°

May

8419.2° / 14.7°

Jun

8520.2° / 16.3°

Jul

8822° / 18.1°

Aug

9022.9° / 18.5°

Sep

9122.8° / 17.9°

Oct

9222° / 15.8°

Nov

8220° / 12.5°

Dec

7017.9° / 10.1°

Monthly climate evidence for San Joaquin Hills — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 4 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	17.8°C	10.2°C	56 mm	5	15.1°C	10 h 09	66	Strong coverage
February	17.4°C	10.6°C	61 mm	5.3	15.0°C	10 h 56	64	Strong coverage
March	17.7°C	11.8°C	33 mm	3.8	15.2°C	11 h 52	73	Strong coverage
April	18.3°C	12.8°C	13 mm	2.1	15.7°C	12 h 58	77	Strong coverage
May	19.2°C	14.7°C	5 mm	0.9	17.0°C	13 h 53	84	Strong coverage
June	20.2°C	16.3°C	2 mm	0.1	18.5°C	14 h 22	85	Strong coverage
July	22°C	18.1°C	1 mm	0.2	20.2°C	14 h 11	88	Strong coverage
August	22.9°C	18.5°C	0 mm	0	20.7°C	13 h 24	90	Strong coverage
September	22.8°C	17.9°C	2 mm	0.3	20.5°C	12 h 20	91	Strong coverage
October	22°C	15.8°C	9 mm	1.3	19.3°C	11 h 17	92	Strong coverage
November	20°C	12.5°C	16 mm	2.4	17.6°C	10 h 22	82	Strong coverage
December	17.9°C	10.1°C	41 mm	4.1	15.8°C	9 h 56	70	Strong coverage

What has changed

San Joaquin Hills runs +0.3°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+0.5

Feb

-0.2

Mar

+0.2

Apr

+0.1

May

0.0

Jun

+0.1

Jul

+0.1

Aug

+0.4

Sep

+0.9

Oct

+0.6

Nov

+0.6

Dec

+0.3

October daytime highs, 2011–2025. Last recorded: 21.5°C.

Records at NEWPORT BEACH HARBOR, 1921–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	30.6°C11 Jan 1983	-1.7°C22 Jan 1937	91 mm21 Jan 2017	281 mm1995 · driest 0 mm in 1976	103
February	32.8°C10 Feb 2022	-0.6°C4 Feb 1971	97 mm24 Feb 1969	286 mm1998 · driest 0 mm in 1961	102
March	32.8°C14 Mar 1951	0.6°C2 Mar 1953	61 mm1 Mar 1978	197 mm1983 · driest 0 mm in 1956	103
April	38.3°C7 Apr 2022	2.8°C15 Apr 1921	63 mm7 Apr 1958	128 mm1965 · driest 0 mm in 1979	101
May	35.0°C13 May 2014	3.9°C1 May 2000	31 mm22 May 1921	69 mm1921 · driest 0 mm in 1963	105
June	38.9°C15 Jun 1981	5.6°C2 Jun 1923	21 mm5 Jun 1993	25 mm1934 · driest 0 mm in 1954	105
July	31.1°C25 Jul 2006	7.2°C15 Jul 1929	3 mm8 Jul 1992	7 mm1992 · driest 0 mm in 1967	103
August	34.4°C31 Aug 1955	10.6°C30 Aug 1929	45 mm21 Aug 2023	65 mm2023 · driest 0 mm in 2025	103
September	41.7°C26 Sep 1963	7.2°C9 Sep 1929	70 mm25 Sep 1939	80 mm1939 · driest 0 mm in 1994	101
October	35.6°C21 Oct 1965	0.0°C30 Oct 1971	61 mm31 Oct 1927	96 mm1927 · driest 0 mm in 1949	100
November	34.4°C3 Nov 1950	1.1°C17 Nov 1958	79 mm20 Nov 1963	163 mm1944 · driest 0 mm in 1977	102
December	30.0°C11 Dec 1924	0.0°C30 Dec 1971	152 mm6 Dec 1997	174 mm1997 · driest 0 mm in 1999	102

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

How often, not how much — every day in NEWPORT BEACH HARBOR’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	19%	17%	6%	18%	15.6–19.5°C
February	18%	17%	7%	18%	15.7–19.3°C
March	18%	14%	4%	12%	16.2–19.8°C
April	22%	9%	3%	5%	16.9–19.8°C
May	34%	3%	<1%	1%	17.9–21.3°C
June	66%	1%	<1%	0%	18.9–22.2°C
July	93%	<1%	0%	0%	20.7–24.1°C
August	97%	<1%	<1%	<1%	21.3–24.7°C
September	94%	2%	<1%	<1%	21.1–25.0°C
October	74%	4%	<1%	2%	19.9–23.8°C
November	45%	9%	3%	6%	18.4–21.8°C
December	21%	14%	5%	14%	16.4–19.8°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.

1925Each stripe is one year’s mean temperature against the 86-year average. Warmest: 2015. Coolest: 1933.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5392148
NOAA station: USC00046175 · NEWPORT BEACH HARBOR
Station distance: 4.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 33.61°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 4 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 NEWPORT BEACH HARBOR is what differs

Costa Mesa→Newport Beach→Balboa→Balboa Island→Bay Shores→Cannery Village Mobile Home Park→

Or put two places side by side: San Joaquin Hills vs Costa Mesa

Best time to visitSan Joaquin Hills.

October

August

November

The whole year,without the guesswork.

San Joaquin Hills runs +0.3°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
San Joaquin Hills.

The whole year,
without the guesswork.

San Joaquin Hills runs +0.3°C
on the 1961–1990 baseline.

Nearby, measured,
and named.