United States · 1991–2020

Best time to visit
Williams.

April leads for comfortable weather in Williams: typically 23.2°C by day, 8.1°C at night, with 28 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortApril

Typical high23.2°C

Typical low8.1°C

Rain in April28 mm

Comfort

April

April · May · October

84climate match

Beach

June

June · May · July

75climate match

Outdoors

April

April · November · March

85climate match

The weakest month is January, scoring 29 against April’s 84 — days reach only 12.9°C, 11° 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

2912.9° / 3.7°

Feb

4515.9° / 5.4°

Mar

5919.4° / 6.7°

Apr

8423.2° / 8.1°

May

8327.6° / 12.1°

Jun

7531.5° / 14.8°

Jul

6633.9° / 15.7°

Aug

6833.5° / 14.7°

Sep

6932.1° / 12.7°

Oct

8126.6° / 9.1°

Nov

6018° / 5.5°

Dec

3012.9° / 3.3°

Monthly climate evidence for Williams — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	12.9°C	3.7°C	94 mm	9.1	9 h 42	29	Good coverage
February	15.9°C	5.4°C	83 mm	7.5	10 h 40	45	Good coverage
March	19.4°C	6.7°C	74 mm	9.3	11 h 50	59	Good coverage
April	23.2°C	8.1°C	28 mm	4.4	13 h 10	84	Good coverage
May	27.6°C	12.1°C	19 mm	2.5	14 h 18	83	Good coverage
June	31.5°C	14.8°C	5 mm	0.7	14 h 54	75	Good coverage
July	33.9°C	15.7°C	0 mm	0	14 h 40	66	Strong coverage
August	33.5°C	14.7°C	1 mm	0.1	13 h 42	68	Strong coverage
September	32.1°C	12.7°C	3 mm	0.5	12 h 24	69	Strong coverage
October	26.6°C	9.1°C	19 mm	2.3	11 h 06	81	Good coverage
November	18°C	5.5°C	42 mm	5.1	9 h 59	60	Good coverage
December	12.9°C	3.3°C	83 mm	8.8	9 h 26	30	Good coverage

What has changed

Williams runs +0.8°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

+2.2

Feb

+0.7

Mar

+0.4

Apr

+1.5

May

+0.3

Jun

+0.1

Jul

-0.7

Aug

-0.2

Sep

+0.9

Oct

+1.4

Nov

+1.2

Dec

+1.6

April daytime highs, 2011–2023. Last recorded: 23.9°C.

Records at COLUSA 2 SSW, 1948–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C8 Jan 1962	-7.8°C14 Jan 2025	77 mm9 Jan 1995	350 mm1995 · driest 0 mm in 2007	76
February	27.2°C11 Feb 2022	-6.7°C7 Feb 2020	90 mm2 Feb 1998	307 mm1998 · driest 0 mm in 1964	76
March	33.3°C21 Mar 2026	-3.9°C18 Mar 1976	71 mm8 Mar 1995	201 mm1995 · driest 0 mm in 2008	75
April	36.7°C21 Apr 2009	-4.4°C29 Apr 2024	51 mm27 Apr 1953	122 mm1967 · driest 0 mm in 1949	75
May	41.1°C31 May 1950	-0.6°C3 May 2020	35 mm15 May 1996	94 mm1998 · driest 0 mm in 2025	76
June	44.4°C15 Jun 1961	1.1°C7 Jun 2023	26 mm28 Jun 2011	38 mm1967 · driest 0 mm in 1952	75
July	44.4°C14 Jul 1972	1.7°C28 Jul 2007	24 mm8 Jul 1974	24 mm1974 · driest 0 mm in 2001	74
August	45.0°C10 Aug 1978	5.6°C24 Aug 2020	22 mm11 Aug 1965	22 mm1965 · driest 0 mm in 2016	77
September	45.6°C7 Sep 2022	1.1°C4 Sep 2021	55 mm17 Sep 1989	75 mm1989 · driest 0 mm in 2025	77
October	40.6°C2 Oct 2001	-6.7°C15 Oct 2021	85 mm12 Oct 1962	159 mm1962 · driest 0 mm in 2002	77
November	31.1°C9 Nov 1955	-5.6°C29 Nov 1948	78 mm28 Nov 1970	160 mm1984 · driest 0 mm in 1959	75
December	24.4°C26 Dec 1967	-10.0°C16 Dec 2022	52 mm11 Dec 1995	220 mm2014 · driest 0 mm in 1989	76

Typical days per month at COLUSA 2 SSW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	5	3
February	<1	0	2	3
March	4	<1	<1	2
April	11	3	<1	<1
May	22	11	<1	<1
June	28	20	0	<1
July	31	28	0	0
August	31	27	0	<1
September	29	22	0	<1
October	21	8	0	<1
November	2	0	2	2
December	0	0	7	3

The best month has moved. On the 1961–1990 numbers the strongest month here was October (scoring 83); on 2011–2025 it is April (86). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in COLUSA 2 SSW’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	3%	27%	10%	31%	10.5–14.6°C
February	15%	25%	10%	30%	14.0–18.5°C
March	39%	24%	7%	22%	16.1–21.7°C
April	71%	13%	3%	10%	20.2–26.3°C
May	89%	7%	1%	4%	25.3–30.5°C
June	97%	3%	<1%	0%	29.3–34.2°C
July	100%	<1%	<1%	0%	32.9–37.0°C
August	99%	<1%	<1%	<1%	32.3–35.9°C
September	98%	3%	<1%	1%	30.1–33.8°C
October	86%	9%	3%	8%	23.9–28.8°C
November	31%	19%	7%	22%	15.0–20.2°C
December	3%	25%	9%	28%	10.4–15.0°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.

1949Each stripe is one year’s mean temperature against the 60-year average. Warmest: 2017. Coolest: 1965.2022

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5409417
NOAA station: USC00041948 · COLUSA 2 SSW
Station distance: 11.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 39.15°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 COLUSA 2 SSW is what differs

Colusa→Arbuckle→Maxwell→Grimes→Meridian→Princeton→

Or put two places side by side: Williams vs Colusa

Best time to visitWilliams.

April

June

April

The whole year,without the guesswork.

Williams runs +0.8°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Williams.

The whole year,
without the guesswork.

Williams runs +0.8°C
on the 1961–1990 baseline.

Nearby, measured,
and named.