United States · 1991–2020

Best time to visit
Sumner.

October leads for comfortable weather in Sumner: typically 25.7°C by day, 11.9°C at night, with 62 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high25.7°C

Typical low11.9°C

Rain in October62 mm

Comfort

October

October · April · May

84climate match

Beach

September

September · May · June

76climate match

Outdoors

November

November · March · October

86climate match

The weakest month is January, scoring 36 against October’s 84 — days reach only 15.4°C, 9° below the 24°C the score treats as ideal, and nights drop to 2.2°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

3615.4° / 2.2°

Feb

4317.2° / 4°

Mar

6221.3° / 7.6°

Apr

8125.5° / 11.2°

May

7129.4° / 16.3°

Jun

4931.8° / 20.1°

Jul

4433° / 21.6°

Aug

4532.5° / 21.2°

Sep

6530.3° / 17.9°

Oct

8425.7° / 11.9°

Nov

7020.8° / 6.7°

Dec

4216.3° / 3.1°

Monthly climate evidence for Sumner — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	15.4°C	2.2°C	103 mm	6.3	10 h 18	36	Good coverage
February	17.2°C	4°C	118 mm	6.2	11 h 01	43	Good coverage
March	21.3°C	7.6°C	126 mm	5.9	11 h 54	62	Good coverage
April	25.5°C	11.2°C	74 mm	4.9	12 h 54	81	Good coverage
May	29.4°C	16.3°C	77 mm	5.7	13 h 44	71	Good coverage
June	31.8°C	20.1°C	104 mm	9.7	14 h 11	49	Good coverage
July	33°C	21.6°C	104 mm	7.8	14 h 01	44	Good coverage
August	32.5°C	21.2°C	112 mm	8.4	13 h 18	45	Good coverage
September	30.3°C	17.9°C	85 mm	5.1	12 h 19	65	Good coverage
October	25.7°C	11.9°C	62 mm	4.1	11 h 21	84	Good coverage
November	20.8°C	6.7°C	60 mm	4.4	10 h 30	70	Good coverage
December	16.3°C	3.1°C	96 mm	5.8	10 h 06	42	Good coverage

Records at ASHBURN 3 ENE, 1957–2013
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	26.7°C20 Jan 2001	-17.2°C21 Jan 1985	118 mm12 Jan 1993	313 mm1987 · driest 10 mm in 2007	56
February	30.6°C27 Feb 1977	-12.2°C26 Feb 1967	118 mm25 Feb 2013	400 mm2013 · driest 0 mm in 2009	52
March	30.6°C11 Mar 1974	-8.9°C3 Mar 1980	88 mm30 Mar 2000	310 mm1994 · driest 0 mm in 2007	54
April	34.4°C28 Apr 1986	-0.6°C2 Apr 1992	139 mm29 Apr 1996	255 mm1958 · driest 0 mm in 2008	54
May	36.7°C23 May 2011	4.4°C21 May 2002	100 mm4 May 2010	214 mm1976 · driest 0 mm in 2007	53
June	38.9°C14 Jun 2011	10.0°C1 Jun 2004	79 mm21 Jun 1980	313 mm1987 · driest 4 mm in 2008	51
July	38.9°C21 Jul 1986	12.2°C2 Jul 2004	85 mm7 Jul 1999	259 mm1984 · driest 0 mm in 2009	52
August	38.9°C19 Aug 2000	13.3°C4 Aug 1988	113 mm16 Aug 1994	305 mm1970 · driest 12 mm in 1989	53
September	37.2°C2 Sep 1957	-1.1°C29 Sep 2006	119 mm3 Sep 1998	268 mm1998 · driest 1 mm in 2008	53
October	36.1°C6 Oct 1986	-4.4°C18 Oct 2006	133 mm2 Oct 1994	240 mm1959 · driest 0 mm in 1961	56
November	31.1°C1 Nov 1961	-8.3°C25 Nov 1970	116 mm30 Nov 1978	231 mm1997 · driest 3 mm in 1960	54
December	27.8°C4 Dec 1990	-13.3°C25 Dec 1983	84 mm31 Dec 1989	211 mm1997 · driest 9 mm in 1980	55

Typical days per month at ASHBURN 3 ENE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	9	3
February	1	0	5	3
March	8	0	2	4
April	16	3	0	2
May	24	13	0	2
June	25	20	0	3
July	26	24	0	3
August	26	23	0	3
September	24	16	<1	3
October	17	3	<1	2
November	5	<1	2	2
December	1	0	8	3

How often, not how much — every day in ASHBURN 3 ENE’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	16%	25%	14%	22%	11.3–19.1°C
February	26%	27%	13%	26%	13.9–20.0°C
March	46%	26%	14%	26%	18.0–23.2°C
April	73%	19%	9%	13%	23.5–27.4°C
May	77%	22%	10%	22%	27.3–30.7°C
June	69%	31%	15%	38%	30.1–33.5°C
July	66%	32%	15%	39%	31.6–34.2°C
August	71%	28%	12%	30%	31.0–34.2°C
September	78%	22%	9%	19%	28.6–31.8°C
October	79%	15%	6%	8%	24.1–27.3°C
November	52%	18%	7%	14%	18.8–23.6°C
December	22%	22%	11%	19%	13.8–19.1°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.

1958Each stripe is one year’s mean temperature against the 35-year average. Warmest: 1986. Coolest: 1976.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4225146
NOAA station: USC00090406 · ASHBURN 3 ENE
Station distance: 23.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 16 usable years
Daylight: Calculated from latitude 31.51°, 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 ASHBURN 3 ENE is what differs

Sylvester→Ashburn→Poulan→Sycamore→Rebecca→Armboy→

Or put two places side by side: Sumner vs Sylvester

Best time to visitSumner.