United States · 1991–2020

Best time to visit
Rollingwood.

September leads for comfortable weather in Rollingwood: typically 23.9°C by day, 13.8°C at night, with 1 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.9°C

Typical low13.8°C

Rain in September1 mm

Comfort

September

September · August · October

97climate match

Beach

September

September · August · October

64climate match

Outdoors

May

May · April · June

96climate match

The weakest month is January, scoring 36 against September’s 97 — days reach only 14.5°C, 9° 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

3614.5° / 6.9°

Feb

4616.4° / 7.9°

Mar

5517.8° / 8.7°

Apr

7319.5° / 9.9°

May

8220.5° / 11.3°

Jun

8922.1° / 12.5°

Jul

8921.8° / 13.2°

Aug

9222.4° / 13.7°

Sep

9723.9° / 13.8°

Oct

9122.7° / 12.3°

Nov

6518.3° / 9.5°

Dec

3714.6° / 7.2°

Monthly climate evidence for Rollingwood — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 28 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	14.5°C	6.9°C	125 mm	9.3	11.6°C	9 h 48	36	Strong coverage
February	16.4°C	7.9°C	118 mm	8.2	11.9°C	10 h 43	46	Strong coverage
March	17.8°C	8.7°C	99 mm	8.2	12.0°C	11 h 50	55	Strong coverage
April	19.5°C	9.9°C	47 mm	4.9	11.5°C	13 h 07	73	Strong coverage
May	20.5°C	11.3°C	19 mm	2.4	11.7°C	14 h 12	82	Strong coverage
June	22.1°C	12.5°C	8 mm	1	12.1°C	14 h 47	89	Strong coverage
July	21.8°C	13.2°C	0 mm	0	13.4°C	14 h 33	89	Strong coverage
August	22.4°C	13.7°C	1 mm	0.1	14.2°C	13 h 38	92	Strong coverage
September	23.9°C	13.8°C	1 mm	0.2	14.4°C	12 h 23	97	Strong coverage
October	22.7°C	12.3°C	29 mm	2.1	13.7°C	11 h 09	91	Strong coverage
November	18.3°C	9.5°C	62 mm	5.3	12.9°C	10 h 04	65	Strong coverage
December	14.6°C	7.2°C	127 mm	8.4	12.0°C	9 h 33	37	Strong coverage

What has changed

Rollingwood runs +0.7°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

+1.2

Feb

+0.6

Mar

0.0

Apr

+0.7

May

+0.4

Jun

+0.8

Jul

+0.3

Aug

+0.6

Sep

+1.0

Oct

+1.1

Nov

+0.6

Dec

+0.8

September daytime highs, 2013–2025. Last recorded: 24.1°C.

Records at RICHMOND, 1950–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C29 Jan 2015	-2.8°C7 Jan 1982	174 mm4 Jan 1982	297 mm1973 · driest 0 mm in 2015	75
February	27.2°C5 Feb 2018	-2.2°C16 Feb 1956	86 mm3 Feb 1998	417 mm1998 · driest 0 mm in 1953	74
March	31.1°C21 Mar 2026	0.6°C3 Mar 1951	69 mm28 Mar 2019	311 mm1983 · driest 0 mm in 2008	74
April	34.4°C26 Apr 2004	-0.6°C11 Apr 1976	59 mm27 Apr 1953	172 mm2006 · driest 3 mm in 1987	75
May	37.8°C12 May 1976	3.3°C16 May 1977	52 mm16 May 1996	95 mm1998 · driest 0 mm in 1999	73
June	41.1°C14 Jun 2000	6.1°C19 Jun 1975	36 mm4 Jun 1993	53 mm2011 · driest 0 mm in 1955	72
July	36.7°C3 Jul 1970	6.7°C22 Jul 1984	31 mm8 Jul 1974	36 mm1974 · driest 0 mm in 1996	75
August	39.4°C25 Aug 2010	6.7°C14 Aug 1983	25 mm20 Aug 1997	28 mm1997 · driest 0 mm in 2008	69
September	41.7°C14 Sep 1971	6.1°C30 Sep 1983	52 mm18 Sep 1959	70 mm1959 · driest 0 mm in 2020	72
October	37.8°C2 Oct 1980	5.0°C19 Oct 1971	86 mm24 Oct 2021	187 mm1962 · driest 0 mm in 2018	74
November	31.7°C14 Nov 2010	1.1°C14 Nov 1985	69 mm21 Nov 1977	268 mm1973 · driest 0 mm in 1959	74
December	24.4°C27 Dec 1967	-4.4°C22 Dec 1990	99 mm20 Dec 1969	391 mm2002 · driest 0 mm in 2013	75

Typical days per month at RICHMOND, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	0	0	4
February	<1	0	4
March	1	0	3
April	3	<1	1
May	4	1	<1
June	6	1	<1
July	5	<1	0
August	6	1	0
September	9	4	0
October	8	2	<1
November	1	<1	2
December	0	0	4

How often, not how much — every day in RICHMOND’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	4%	28%	13%	36%	12.9–15.9°C
February	14%	27%	13%	35%	14.7–18.4°C
March	25%	26%	9%	29%	15.9–19.7°C
April	38%	16%	5%	14%	17.2–21.1°C
May	51%	6%	1%	5%	18.3–22.2°C
June	66%	2%	<1%	<1%	20.1–23.9°C
July	67%	<1%	0%	0%	20.0–23.4°C
August	74%	1%	<1%	<1%	20.3–23.4°C
September	82%	2%	<1%	<1%	21.7–26.1°C
October	69%	8%	3%	6%	20.8–24.3°C
November	29%	20%	9%	24%	16.7–20.0°C
December	3%	27%	12%	31%	13.0–16.3°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.

1951Each stripe is one year’s mean temperature against the 60-year average. Warmest: 2015. Coolest: 1955.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5388611
NOAA station: USC00047414 · RICHMOND
Station distance: 6.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 37.97°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 28 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 RICHMOND is what differs

Richmond→San Pablo→El Cerrito→Pinole→El Sobrante→Tiburon→

Or put two places side by side: Rollingwood vs Richmond

Best time to visitRollingwood.

September

September

May

The whole year,without the guesswork.

Rollingwood runs +0.7°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Rollingwood.

The whole year,
without the guesswork.

Rollingwood runs +0.7°C
on the 1961–1990 baseline.

Nearby, measured,
and named.