United States · 1991–2020

Best time to visit
Washington.

September leads for comfortable weather in Washington: typically 24.9°C by day, 11.7°C at night, with 114 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.9°C

Typical low11.7°C

Rain in September114 mm

Comfort

September

September · June · August

76climate match

Beach

July

July · August · June

66climate match

Outdoors

May

May · October · September

71climate match

The weakest month is January, scoring 5 against September’s 76 — days reach only 2.7°C, 21° 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

52.7° / -7.3°

Feb

54.7° / -6.3°

Mar

69.2° / -2.6°

Apr

3916.2° / 2.8°

May

6521.9° / 8.4°

Jun

7326.5° / 13.8°

Jul

6329.2° / 16.6°

Aug

6728.3° / 15.7°

Sep

7624.9° / 11.7°

Oct

4718.2° / 5.2°

Nov

2111.5° / -0.3°

Dec

55.5° / -4.2°

Monthly climate evidence for Washington — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.7°C	-7.3°C	81 mm	7.8	9 h 33	5	Strong coverage
February	4.7°C	-6.3°C	68 mm	7.1	10 h 35	5	Strong coverage
March	9.2°C	-2.6°C	93 mm	8.7	11 h 49	6	Strong coverage
April	16.2°C	2.8°C	90 mm	9	13 h 14	39	Strong coverage
May	21.9°C	8.4°C	99 mm	11	14 h 26	65	Strong coverage
June	26.5°C	13.8°C	113 mm	9.6	15 h 05	73	Strong coverage
July	29.2°C	16.6°C	117 mm	9.4	14 h 49	63	Strong coverage
August	28.3°C	15.7°C	118 mm	9.1	13 h 48	67	Strong coverage
September	24.9°C	11.7°C	114 mm	7.5	12 h 25	76	Strong coverage
October	18.2°C	5.2°C	120 mm	8.3	11 h 03	47	Strong coverage
November	11.5°C	-0.3°C	81 mm	7	9 h 51	21	Strong coverage
December	5.5°C	-4.2°C	104 mm	9.2	9 h 16	5	Strong coverage

Records at BELVIDERE BRG, 1981–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.9°C14 Jan 2005	-27.8°C31 Jan 2026	59 mm10 Jan 2024	183 mm1999 · driest 12 mm in 2025	44
February	25.0°C22 Feb 2018	-27.8°C1 Feb 2026	107 mm8 Feb 2003	239 mm2003 · driest 5 mm in 2002	44
March	29.4°C31 Mar 1998	-17.2°C10 Mar 1984	57 mm5 Mar 2008	175 mm2008 · driest 11 mm in 2006	43
April	33.9°C27 Apr 1990	-8.9°C7 Apr 1982	69 mm3 Apr 2005	253 mm1983 · driest 30 mm in 2008	43
May	35.0°C20 May 2026	-2.8°C7 May 2013	76 mm29 May 1982	302 mm2019 · driest 8 mm in 2015	43
June	35.6°C26 Jun 2003	3.9°C1 Jun 2020	130 mm27 Jun 2023	285 mm2003 · driest 26 mm in 1988	43
July	38.3°C11 Jul 1988	6.1°C2 Jul 2011	105 mm15 Jul 2023	313 mm2023 · driest 26 mm in 1999	43
August	37.8°C1 Aug 2002	5.0°C30 Aug 1986	152 mm28 Aug 2011	352 mm2011 · driest 22 mm in 1995	42
September	36.7°C11 Sep 1983	0.0°C30 Sep 2003	190 mm17 Sep 1999	364 mm2004 · driest 26 mm in 2024	43
October	32.8°C9 Oct 2007	-6.1°C31 Oct 1983	174 mm9 Oct 2005	463 mm2005 · driest 0 mm in 2024	43
November	26.7°C2 Nov 2024	-13.9°C24 Nov 2018	80 mm3 Nov 2018	239 mm2018 · driest 23 mm in 2012	43
December	22.8°C5 Dec 1998	-23.3°C23 Dec 2024	75 mm12 Dec 2008	199 mm2023 · driest 9 mm in 1989	44

Typical days per month at BELVIDERE BRG, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	3	4
February	0	0	24	2	2
March	<1	0	21	3	2
April	2	<1	8	3	<1
May	9	2	<1	3	0
June	20	7	0	4	0
July	27	13	0	4	0
August	26	10	0	4	0
September	15	4	0	4	0
October	3	<1	5	3	0
November	<1	0	17	3	<1
December	0	0	23	4	2

How often, not how much — every day in BELVIDERE BRG’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%	25%	9%	28%	-0.4–5.8°C
February	<1%	26%	8%	28%	1.5–7.8°C
March	5%	27%	10%	32%	6.4–12.6°C
April	21%	31%	10%	41%	14.2–19.2°C
May	48%	35%	11%	45%	19.6–23.9°C
June	67%	31%	13%	37%	24.7–28.1°C
July	69%	31%	13%	38%	27.1–30.8°C
August	71%	29%	12%	30%	26.3–29.8°C
September	68%	25%	11%	27%	22.9–26.9°C
October	33%	25%	10%	24%	16.4–20.4°C
November	6%	24%	9%	24%	9.3–14.2°C
December	<1%	28%	11%	31%	2.8–8.4°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.

1982Each stripe is one year’s mean temperature against the 36-year average. Warmest: 2024. Coolest: 1992.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5106057
NOAA station: USC00280734 · BELVIDERE BRG
Station distance: 11.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 40.76°, 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 BELVIDERE BRG is what differs

Bangor→Pen Argyl→Wind Gap→Belvidere→East Bangor→Brass Castle→

Or put two places side by side: Washington vs Bangor

Best time to visitWashington.

September

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Washington.

The whole year,
without the guesswork.

Nearby, measured,
and named.