United States · 1991–2020

Best time to visit
Gridley.

September leads for comfortable weather in Gridley: typically 25.7°C by day, 12.3°C at night, with 79 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.7°C

Typical low12.3°C

Rain in September79 mm

Comfort

September

September · May · August

81climate match

Beach

July

July · August · June

75climate match

Outdoors

October

October · September · April

75climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only 0.5°C, 23° 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

50.5° / -8.7°

Feb

53° / -7°

Mar

1710.2° / -1.3°

Apr

4717.6° / 4.5°

May

7523.8° / 11°

Jun

7128.3° / 16.2°

Jul

6529.6° / 17.9°

Aug

7328.6° / 16.5°

Sep

8125.7° / 12.3°

Oct

5518.6° / 6.3°

Nov

189.8° / -0.1°

Dec

53.4° / -5.5°

Monthly climate evidence for Gridley — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.5°C	-8.7°C	61 mm	5.6	9 h 33	5	Strong coverage
February	3°C	-7°C	39 mm	4.3	10 h 35	5	Strong coverage
March	10.2°C	-1.3°C	66 mm	6.8	11 h 49	17	Strong coverage
April	17.6°C	4.5°C	91 mm	9.2	13 h 14	47	Strong coverage
May	23.8°C	11°C	113 mm	9.6	14 h 26	75	Strong coverage
June	28.3°C	16.2°C	95 mm	8.1	15 h 05	71	Strong coverage
July	29.6°C	17.9°C	90 mm	7.2	14 h 49	65	Strong coverage
August	28.6°C	16.5°C	76 mm	6.7	13 h 47	73	Strong coverage
September	25.7°C	12.3°C	79 mm	6	12 h 25	81	Strong coverage
October	18.6°C	6.3°C	86 mm	7.9	11 h 03	55	Strong coverage
November	9.8°C	-0.1°C	66 mm	7	9 h 51	18	Strong coverage
December	3.4°C	-5.5°C	56 mm	6	9 h 16	5	Strong coverage

What has changed

Gridley 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

+1.4

Feb

-0.7

Mar

+0.7

Apr

-0.1

May

+1.0

Jun

+0.4

Jul

+0.3

Aug

+0.4

Sep

+0.8

Oct

0.0

Nov

0.0

Dec

+3.8

September daytime highs, 2011–2023. Last recorded: 26.8°C.

Records at CHENOA, 1951–2023
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C24 Jan 1967	-31.7°C16 Jan 2009	107 mm27 Jan 2004	209 mm1965 · driest 0 mm in 2009	70
February	22.8°C26 Feb 1996	-30.0°C10 Feb 2014	46 mm11 Feb 2009	119 mm1997 · driest 0 mm in 2007	70
March	29.4°C29 Mar 1986	-21.1°C4 Mar 2002	95 mm28 Mar 1985	179 mm2007 · driest 8 mm in 1958	71
April	32.8°C26 Apr 1986	-13.9°C7 Apr 1982	56 mm27 Apr 1959	274 mm1957 · driest 8 mm in 1971	71
May	37.2°C12 May 2022	-5.6°C10 May 1966	62 mm24 May 1995	229 mm2013 · driest 5 mm in 1992	71
June	38.9°C25 Jun 1988	2.2°C11 Jun 1972	96 mm25 Jun 1968	208 mm1993 · driest 3 mm in 1964	69
July	40.6°C7 Jul 2012	7.2°C1 Jul 1988	208 mm9 Jul 1951	229 mm1951 · driest 12 mm in 1991	71
August	39.4°C17 Aug 1988	2.8°C18 Aug 1963	103 mm6 Aug 2023	220 mm1977 · driest 15 mm in 1984	70
September	37.8°C2 Sep 1953	-4.4°C23 Sep 1974	91 mm14 Sep 2008	273 mm1961 · driest 2 mm in 1979	70
October	33.3°C2 Oct 1953	-8.3°C29 Oct 1952	144 mm3 Oct 1986	252 mm2009 · driest 0 mm in 1964	70
November	26.1°C9 Nov 2023	-20.0°C29 Nov 1955	142 mm30 Nov 2008	192 mm1985 · driest 0 mm in 2023	70
December	22.2°C3 Dec 2012	-32.2°C22 Dec 1989	129 mm3 Dec 1982	248 mm2007 · driest 3 mm in 1955	69

Typical days per month at CHENOA, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	2	3
February	0	0	24	1	3
March	<1	0	20	2	2
April	4	<1	6	3	<1
May	14	5	<1	4	0
June	24	11	0	3	0
July	29	15	0	3	0
August	27	11	0	2	0
September	17	6	<1	2	0
October	6	1	4	3	0
November	<1	0	16	2	<1
December	0	0	25	2	3

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 82); on 2011–2025 it is September (82). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in CHENOA’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	0%	19%	4%	16%	-3.2–3.9°C
February	<1%	19%	4%	16%	-1.8–6.4°C
March	7%	23%	7%	24%	6.1–12.6°C
April	26%	30%	11%	35%	14.4–20.1°C
May	56%	29%	11%	35%	20.9–26.7°C
June	71%	26%	11%	29%	26.6–30.9°C
July	77%	24%	10%	23%	28.0–32.3°C
August	78%	21%	8%	18%	26.9–31.0°C
September	73%	21%	8%	21%	23.8–27.9°C
October	36%	22%	8%	22%	16.4–21.0°C
November	6%	23%	7%	23%	6.4–12.7°C
December	<1%	21%	6%	18%	-0.1–6.6°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.

1952Each stripe is one year’s mean temperature against the 57-year average. Warmest: 2012. Coolest: 1979.2021

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4894753
NOAA station: USC00111475 · CHENOA
Station distance: 13.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 40.74°, 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 CHENOA is what differs

Fairbury→Lexington→Chenoa→Colfax→Pleasant Hill→Meadows→

Or put two places side by side: Gridley vs Fairbury

Best time to visitGridley.