United States · 1991–2020

Best time to visit
Bristol.

August leads for comfortable weather in Bristol: typically 26.9°C by day, 15°C at night, with 71 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high26.9°C

Typical low15°C

Rain in August71 mm

Comfort

August

August · September · June

83climate match

Beach

July

July · August · June

71climate match

Outdoors

May

May · September · October

84climate match

The weakest month is January, scoring 5 against August’s 83 — days reach only -5°C, 29° 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

5-5° / -14.6°

Feb

5-4° / -14.2°

Mar

54.7° / -5.6°

Apr

3412.9° / 0.6°

May

6420° / 7.8°

Jun

7725.8° / 14°

Jul

7128.5° / 16.5°

Aug

8326.9° / 15°

Sep

8122.7° / 10.5°

Oct

4013.8° / 2.6°

Nov

66.3° / -4.7°

Dec

5-2.8° / -12.2°

Monthly climate evidence for Bristol — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-5°C	-14.6°C	13 mm	2.6	9 h 05	5	Good coverage
February	-4°C	-14.2°C	17 mm	4.1	10 h 19	5	Good coverage
March	4.7°C	-5.6°C	22 mm	3.6	11 h 46	5	Good coverage
April	12.9°C	0.6°C	45 mm	5.6	13 h 26	34	Good coverage
May	20°C	7.8°C	74 mm	7.9	14 h 51	64	Good coverage
June	25.8°C	14°C	105 mm	9.5	15 h 38	77	Good coverage
July	28.5°C	16.5°C	90 mm	7.8	15 h 20	71	Good coverage
August	26.9°C	15°C	71 mm	6	14 h 06	83	Good coverage
September	22.7°C	10.5°C	61 mm	6.9	12 h 28	81	Good coverage
October	13.8°C	2.6°C	51 mm	5.6	10 h 52	40	Good coverage
November	6.3°C	-4.7°C	15 mm	2.7	9 h 27	6	Good coverage
December	-2.8°C	-12.2°C	25 mm	4.6	8 h 45	5	Good coverage

Records at ANDOVER #2, 2005–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	13.9°C6 Jan 2012	-37.2°C30 Jan 2019	31 mm2 Jan 2011	45 mm2011 · driest 0 mm in 2025	21
February	15.6°C27 Feb 2024	-33.9°C8 Feb 2011	21 mm26 Feb 2009	37 mm2011 · driest 1 mm in 2020	21
March	28.9°C19 Mar 2012	-31.7°C3 Mar 2019	35 mm31 Mar 2009	55 mm2009 · driest 1 mm in 2020	22
April	32.2°C23 Apr 2026	-16.7°C6 Apr 2023	43 mm30 Apr 2022	112 mm2022 · driest 1 mm in 2005	22
May	36.1°C28 May 2018	-7.8°C3 May 2013	97 mm6 May 2007	211 mm2007 · driest 12 mm in 2023	22
June	37.8°C6 Jun 2021	1.7°C8 Jun 2007	108 mm29 Jun 2005	300 mm2005 · driest 8 mm in 2022	22
July	40.0°C16 Jul 2006	5.6°C1 Jul 2016	91 mm8 Jul 2026	165 mm2026 · driest 27 mm in 2014	22
August	36.7°C23 Aug 2010	2.8°C31 Aug 2009	69 mm14 Aug 2023	168 mm2021 · driest 7 mm in 2013	21
September	36.1°C5 Sep 2023	-4.4°C22 Sep 2012	66 mm2 Sep 2008	122 mm2009 · driest 2 mm in 2012	21
October	31.7°C2 Oct 2023	-15.6°C26 Oct 2020	32 mm10 Oct 2008	124 mm2009 · driest 2 mm in 2022	21
November	25.0°C6 Nov 2016	-25.6°C27 Nov 2014	39 mm29 Nov 2005	45 mm2005 · driest 0 mm in 2017	21
December	17.8°C8 Dec 2023	-33.9°C23 Dec 2013	18 mm29 Dec 2019	44 mm2019 · driest 6 mm in 2023	21

Typical days per month at ANDOVER #2, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	7
February	0	0	27	<1	7
March	<1	0	25	<1	4
April	1	<1	14	1	3
May	7	1	2	2	<1
June	19	5	0	3	0
July	26	11	0	3	0
August	22	7	0	2	0
September	11	3	<1	2	0
October	2	<1	10	2	1
November	<1	0	22	<1	3
December	0	0	30	<1	9

How often, not how much — every day in ANDOVER #2’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%	8%	<1%	3%	-8.1–-0.4°C
February	0%	13%	1%	5%	-7.2–2.2°C
March	4%	11%	1%	8%	-1.4–10.4°C
April	14%	22%	6%	23%	7.9–16.8°C
May	45%	26%	7%	31%	18.1–22.3°C
June	66%	31%	10%	40%	24.2–28.3°C
July	75%	25%	10%	25%	27.4–30.2°C
August	79%	20%	8%	15%	24.9–28.4°C
September	63%	22%	6%	25%	21.3–25.5°C
October	22%	17%	6%	16%	10.3–17.1°C
November	3%	10%	2%	6%	2.8–9.2°C
December	0%	16%	2%	10%	-7.1–2.8°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.

2006Each stripe is one year’s mean temperature against the 20-year average. Warmest: 2012. Coolest: 2009.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5226517
NOAA station: USC00390120 · ANDOVER #2
Station distance: 14.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 45.34°, 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 ANDOVER #2 is what differs

Groton→Pierpont→Andover→Ferney→

Or put two places side by side: Bristol vs Groton

Best time to visitBristol.

August

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Bristol.

The whole year,
without the guesswork.

Nearby, measured,
and named.