United States · 1991–2020

Best time to visit
Bristol.

August leads for comfortable weather in Bristol: typically 24.9°C by day, 14.9°C at night, with 85 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high24.9°C

Typical low14.9°C

Rain in August85 mm

Comfort

August

August · July · June

86climate match

Beach

July

July · August · June

59climate match

Outdoors

September

September · May · June

79climate match

The weakest month is January, scoring 5 against August’s 86 — days reach only -1.2°C, 25° 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

5-1.2° / -9.7°

Feb

50.5° / -8.5°

Mar

54.9° / -4.1°

Apr

1911.8° / 1.4°

May

5118.2° / 6.9°

Jun

7322.6° / 11.9°

Jul

8125.6° / 15.3°

Aug

8624.9° / 14.9°

Sep

6720.4° / 11.1°

Oct

3013.7° / 5.3°

Nov

57.6° / -0.1°

Dec

51.8° / -5.7°

Monthly climate evidence for Bristol — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 13 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-1.2°C	-9.7°C	97 mm	9.5	5.1°C	9 h 14	5	Strong coverage
February	0.5°C	-8.5°C	92 mm	8.4	3.4°C	10 h 24	5	Strong coverage
March	4.9°C	-4.1°C	110 mm	9	3.1°C	11 h 47	5	Strong coverage
April	11.8°C	1.4°C	106 mm	9.6	4.8°C	13 h 22	19	Strong coverage
May	18.2°C	6.9°C	97 mm	10.2	8.1°C	14 h 43	51	Strong coverage
June	22.6°C	11.9°C	109 mm	9.9	12.0°C	15 h 27	73	Strong coverage
July	25.6°C	15.3°C	87 mm	9	15.5°C	15 h 10	81	Strong coverage
August	24.9°C	14.9°C	85 mm	7.6	16.4°C	14 h	86	Strong coverage
September	20.4°C	11.1°C	106 mm	7.6	14.7°C	12 h 27	67	Strong coverage
October	13.7°C	5.3°C	126 mm	9.6	12.0°C	10 h 55	30	Strong coverage
November	7.6°C	-0.1°C	116 mm	9.7	9.4°C	9 h 34	5	Strong coverage
December	1.8°C	-5.7°C	120 mm	10.4	7.2°C	8 h 55	5	Strong coverage

What has changed

Bristol runs +0.5°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

+0.9

Feb

+0.4

Mar

+0.4

Apr

+0.2

May

+0.4

Jun

-0.2

Jul

0.0

Aug

-0.1

Sep

+1.1

Oct

+0.7

Nov

+0.6

Dec

+1.2

August daytime highs, 2011–2025. Last recorded: 25.2°C.

Records at NEWCASTLE, 1965–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	13.9°C6 Jan 2007	-28.9°C4 Jan 1981	67 mm26 Jan 2023	275 mm1979 · driest 15 mm in 2004	61
February	17.2°C23 Feb 2022	-31.1°C4 Feb 2023	90 mm25 Feb 2010	189 mm2008 · driest 7 mm in 1987	61
March	29.4°C31 Mar 1998	-22.8°C1 Mar 1982	100 mm14 Mar 1977	262 mm2024 · driest 28 mm in 2006	61
April	30.6°C27 Apr 1990	-11.1°C5 Apr 1995	106 mm29 Apr 2008	254 mm1983 · driest 14 mm in 1999	60
May	34.4°C22 May 1992	-2.8°C3 May 1966	114 mm1 May 2023	225 mm1984 · driest 22 mm in 2018	60
June	35.0°C24 Jun 2025	2.2°C3 Jun 1986	91 mm3 Jun 2012	223 mm2009 · driest 5 mm in 1979	62
July	36.7°C22 Jul 1977	6.7°C7 Jul 1965	98 mm9 Jul 2021	243 mm2021 · driest 18 mm in 1965	61
August	38.3°C2 Aug 1975	2.2°C31 Aug 1965	82 mm11 Aug 1990	229 mm1991 · driest 8 mm in 1995	61
September	33.9°C9 Sep 2002	-2.8°C28 Sep 1965	147 mm30 Sep 2015	261 mm2008 · driest 18 mm in 2020	61
October	27.8°C16 Oct 1968	-6.1°C21 Oct 1972	102 mm8 Oct 2005	378 mm2005 · driest 28 mm in 2001	61
November	23.3°C6 Nov 2024	-16.1°C24 Nov 1989	109 mm25 Nov 1983	365 mm1983 · driest 25 mm in 2012	61
December	17.8°C4 Dec 1982	-28.9°C26 Dec 1980	102 mm27 Dec 1969	289 mm1973 · driest 33 mm in 1988	61

Typical days per month at NEWCASTLE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	3	10
February	0	0	26	3	9
March	<1	0	26	4	7
April	<1	0	12	4	3
May	4	<1	<1	3	0
June	10	1	0	3	0
July	20	3	0	3	0
August	16	2	0	2	0
September	4	<1	<1	3	0
October	<1	0	4	4	<1
November	0	0	17	4	2
December	0	0	27	4	8

How often, not how much — every day in NEWCASTLE’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%	30%	11%	37%	-4.1–0.9°C
February	0%	29%	10%	35%	-1.3–2.8°C
March	<1%	29%	12%	37%	2.9–7.2°C
April	5%	32%	12%	38%	10.0–13.6°C
May	29%	32%	11%	39%	16.0–20.4°C
June	58%	32%	10%	38%	20.8–24.3°C
July	72%	27%	8%	30%	23.7–26.9°C
August	74%	25%	8%	23%	23.4–26.2°C
September	42%	25%	10%	28%	18.8–21.8°C
October	7%	29%	12%	34%	12.2–15.7°C
November	<1%	32%	12%	40%	5.5–9.9°C
December	0%	33%	14%	43%	-1.2–4.3°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.

1966Each stripe is one year’s mean temperature against the 58-year average. Warmest: 2024. Coolest: 1972.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4959312
NOAA station: USC00175675 · NEWCASTLE
Station distance: 9.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 43.96°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 13 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 NEWCASTLE is what differs

Jefferson→Nobleboro→Waldoboro→Damariscotta→Bremen→Alna→

Or put two places side by side: Bristol vs Jefferson

Best time to visitBristol.

August

July

September

The whole year,without the guesswork.

Bristol runs +0.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Bristol.

The whole year,
without the guesswork.

Bristol runs +0.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.