United States · 1991–2020

Best time to visit
Stonington.

June leads for comfortable weather in Stonington: typically 23.4°C by day, 14.3°C at night, with 101 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high23.4°C

Typical low14.3°C

Rain in June101 mm

Comfort

June

June · September · August

83climate match

Beach

July

July · August · June

73climate match

Outdoors

May

May · September · October

78climate match

The weakest month is January, scoring 5 against June’s 83 — days reach only 3.4°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

53.4° / -5.3°

Feb

54.5° / -4.5°

Mar

58.1° / -1°

Apr

3013.4° / 3.8°

May

5918.6° / 9.1°

Jun

8323.4° / 14.3°

Jul

7527° / 17.9°

Aug

7826.6° / 17.2°

Sep

8323.2° / 13.3°

Oct

4817.3° / 7.3°

Nov

2612° / 2.3°

Dec

56.6° / -1.9°

Monthly climate evidence for Stonington — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 24 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	3.4°C	-5.3°C	73 mm	8.2	6.1°C	9 h 30	5	Good coverage
February	4.5°C	-4.5°C	68 mm	7.5	4.3°C	10 h 33	5	Good coverage
March	8.1°C	-1°C	105 mm	8	4.4°C	11 h 48	5	Good coverage
April	13.4°C	3.8°C	101 mm	9	6.7°C	13 h 15	30	Good coverage
May	18.6°C	9.1°C	88 mm	9	10.9°C	14 h 29	59	Good coverage
June	23.4°C	14.3°C	101 mm	8.4	15.9°C	15 h 09	83	Good coverage
July	27°C	17.9°C	82 mm	6.9	20.2°C	14 h 53	75	Good coverage
August	26.6°C	17.2°C	81 mm	6.6	21.2°C	13 h 50	78	Good coverage
September	23.2°C	13.3°C	93 mm	6.7	19.8°C	12 h 25	83	Good coverage
October	17.3°C	7.3°C	112 mm	8.5	16.7°C	11 h 01	48	Good coverage
November	12°C	2.3°C	87 mm	7.5	12.9°C	9 h 48	26	Good coverage
December	6.6°C	-1.9°C	100 mm	8.7	9.3°C	9 h 12	5	Good coverage

Records at WESTERLY STATE AP, 1999–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.8°C12 Jan 2020	-22.1°C16 Jan 2009	52 mm20 Jan 2019	156 mm2019 · driest 24 mm in 2014	27
February	21.1°C16 Feb 2023	-23.2°C21 Feb 2015	46 mm25 Feb 2010	156 mm2018 · driest 16 mm in 2014	27
March	22.8°C18 Mar 2011	-16.6°C1 Mar 2015	106 mm30 Mar 2014	340 mm2010 · driest 20 mm in 2006	27
April	31.1°C26 Apr 2009	-5.5°C6 Apr 2016	71 mm13 Apr 2004	180 mm2007 · driest 23 mm in 2013	27
May	32.8°C31 May 2022	-1.7°C1 May 2008	83 mm17 May 2011	206 mm2006 · driest 25 mm in 2015	27
June	35.0°C25 Jun 2025	4.4°C2 Jun 2026	99 mm7 Jun 2013	226 mm2013 · driest 23 mm in 2016	27
July	37.8°C7 Jul 2010	8.3°C12 Jul 2002	132 mm1 Jul 2009	306 mm2009 · driest 13 mm in 2013	27
August	33.9°C30 Aug 2018	8.3°C28 Aug 2025	104 mm15 Aug 2011	170 mm2011 · driest 32 mm in 2020	27
September	33.3°C4 Sep 2018	1.1°C21 Sep 2020	75 mm6 Sep 2008	220 mm2008 · driest 20 mm in 2014	27
October	31.1°C2 Oct 2019	-3.8°C31 Oct 2020	125 mm26 Oct 2002	300 mm2005 · driest 10 mm in 2013	27
November	23.9°C12 Nov 2022	-10.6°C25 Nov 2000	51 mm14 Nov 2000	207 mm2018 · driest 13 mm in 2012	27
December	18.3°C25 Dec 2015	-15.6°C21 Dec 2004	93 mm11 Dec 2024	174 mm2024 · driest 28 mm in 2021	27

Typical days per month at WESTERLY STATE AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	25	2
February	0	0	23	2
March	0	0	19	3
April	<1	<1	6	3
May	3	0	<1	3
June	11	1	0	3
July	24	6	0	2
August	24	4	0	2
September	10	<1	0	3
October	<1	<1	3	3
November	0	0	11	3
December	0	0	21	3

How often, not how much — every day in WESTERLY STATE AP’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%	26%	8%	27%	1.2–6.5°C
February	<1%	27%	8%	30%	1.4–7.2°C
March	<1%	26%	10%	29%	5.8–11.0°C
April	7%	29%	10%	32%	11.6–15.1°C
May	32%	29%	8%	34%	17.5–19.8°C
June	66%	27%	10%	31%	22.3–24.8°C
July	77%	23%	8%	22%	24.9–28.6°C
August	78%	22%	8%	20%	25.4–27.8°C
September	68%	23%	10%	24%	22.2–24.2°C
October	22%	27%	11%	28%	15.8–19.0°C
November	2%	25%	9%	26%	10.2–13.8°C
December	0%	28%	10%	32%	4.2–9.0°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.

2000Each stripe is one year’s mean temperature against the 25-year average. Warmest: 2020. Coolest: 2000.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4843735
NOAA station: USW00014794 · WESTERLY STATE AP
Station distance: 8.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 41.34°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 24 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 WESTERLY STATE AP is what differs

Westerly→Hopkinton→Pawcatuck→Ashaway→Bradford→New Shoreham→

Or put two places side by side: Stonington vs Westerly

Best time to visitStonington.

June

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Stonington.

The whole year,
without the guesswork.

Nearby, measured,
and named.