United States · 1991–2020

Best time to visit
Plymouth.

September leads for comfortable weather in Plymouth: typically 26.6°C by day, 12.6°C at night, with 93 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.6°C

Typical low12.6°C

Rain in September93 mm

Comfort

September

September · May · August

76climate match

Beach

August

August · July · June

71climate match

Outdoors

October

October · April · May

79climate match

The weakest month is January, scoring 5 against September’s 76 — days reach only 1.3°C, 23° 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

51.3° / -8.9°

Feb

54.1° / -6.4°

Mar

2010.8° / -0.8°

Apr

4617.9° / 4.9°

May

7223.5° / 11.2°

Jun

6328.6° / 16.6°

Jul

5730.7° / 18.4°

Aug

6429.9° / 17.1°

Sep

7626.6° / 12.6°

Oct

5919.2° / 6.1°

Nov

2411.3° / -0.1°

Dec

54.2° / -5.5°

Monthly climate evidence for Plymouth — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	1.3°C	-8.9°C	41 mm	5.6	9 h 35	5	Good coverage
February	4.1°C	-6.4°C	51 mm	5.7	10 h 36	5	Strong coverage
March	10.8°C	-0.8°C	65 mm	7	11 h 49	20	Strong coverage
April	17.9°C	4.9°C	104 mm	9.1	13 h 13	46	Strong coverage
May	23.5°C	11.2°C	132 mm	9.8	14 h 23	72	Strong coverage
June	28.6°C	16.6°C	130 mm	8.8	15 h 02	63	Strong coverage
July	30.7°C	18.4°C	108 mm	7.7	14 h 46	57	Strong coverage
August	29.9°C	17.1°C	103 mm	6.4	13 h 46	64	Strong coverage
September	26.6°C	12.6°C	93 mm	5.9	12 h 24	76	Strong coverage
October	19.2°C	6.1°C	80 mm	6.7	11 h 04	59	Strong coverage
November	11.3°C	-0.1°C	63 mm	6.5	9 h 53	24	Strong coverage
December	4.2°C	-5.5°C	48 mm	5.8	9 h 19	5	Strong coverage

Records at BENTLEY, 1995–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.0°C8 Jan 2008	-30.0°C5 Jan 1999	42 mm29 Jan 2001	96 mm2019 · driest 8 mm in 2025	30
February	26.7°C28 Feb 2024	-28.9°C3 Feb 1996	91 mm21 Feb 1997	137 mm1997 · driest 0 mm in 2026	31
March	33.3°C27 Mar 2026	-21.7°C12 Mar 1998	47 mm30 Mar 2019	185 mm2009 · driest 19 mm in 2021	32
April	31.7°C14 Apr 2006	-14.4°C3 Apr 2018	124 mm18 Apr 2013	233 mm2013 · driest 28 mm in 2018	32
May	36.1°C28 May 2018	-1.7°C3 May 2005	80 mm17 May 1995	361 mm2019 · driest 16 mm in 2006	32
June	37.8°C29 Jun 2012	6.7°C3 Jun 2003	109 mm15 Jun 2011	300 mm2010 · driest 15 mm in 2016	32
July	40.6°C25 Jul 2005	8.9°C5 Jul 1997	107 mm21 Jul 1996	266 mm2010 · driest 24 mm in 2007	32
August	40.0°C16 Aug 2007	6.1°C20 Aug 2001	135 mm23 Aug 2001	217 mm2009 · driest 0 mm in 2013	31
September	40.0°C3 Sep 2011	-1.7°C23 Sep 1995	120 mm10 Sep 2014	190 mm2018 · driest 10 mm in 2002	31
October	35.6°C4 Oct 2006	-7.8°C27 Oct 1997	52 mm23 Oct 2009	181 mm2009 · driest 5 mm in 2022	31
November	27.8°C2 Nov 2000	-14.4°C12 Nov 2019	50 mm18 Nov 2015	152 mm2011 · driest 0 mm in 2021	30
December	23.9°C16 Dec 2021	-23.3°C30 Dec 1998	71 mm10 Dec 2003	159 mm2015 · driest 7 mm in 2019	31

Typical days per month at BENTLEY, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	1	4
February	0	0	24	1	4
March	1	0	19	2	1
April	5	1	6	3	<1
May	14	4	<1	4	0
June	25	13	0	4	0
July	29	19	0	3	0
August	29	16	0	3	0
September	19	8	<1	3	0
October	6	1	4	3	<1
November	<1	0	17	2	<1
December	0	0	26	1	3

How often, not how much — every day in BENTLEY’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%	16%	3%	11%	-1.2–3.4°C
February	2%	18%	4%	14%	-1.0–8.1°C
March	11%	24%	7%	27%	7.8–15.1°C
April	28%	29%	11%	34%	14.9–21.0°C
May	53%	30%	11%	37%	21.3–25.7°C
June	70%	27%	11%	31%	27.0–30.6°C
July	75%	25%	11%	25%	28.9–32.7°C
August	78%	21%	9%	17%	27.9–31.6°C
September	77%	21%	10%	18%	24.6–28.6°C
October	41%	21%	8%	21%	17.2–22.3°C
November	10%	20%	6%	17%	7.1–14.9°C
December	<1%	18%	5%	15%	1.7–7.9°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.

1996Each stripe is one year’s mean temperature against the 27-year average. Warmest: 2012. Coolest: 1996.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4906386
NOAA station: USC00110598 · BENTLEY
Station distance: 17.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 24 usable years
Daylight: Calculated from latitude 40.29°, 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 BENTLEY is what differs

Carthage→Bowen→West Point→Ferris→Basco→Bentley→

Or put two places side by side: Plymouth vs Carthage

Best time to visitPlymouth.