United States · 1991–2020

Best time to visit
South Thomaston.

August leads for comfortable weather in South Thomaston: typically 22.2°C by day, 14.3°C at night, with 71 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high22.2°C

Typical low14.3°C

Rain in August71 mm

Comfort

August

August · July · September

84climate match

Beach

August

August · July · September

50climate match

Outdoors

June

June · September · August

78climate match

The weakest month is January, scoring 5 against August’s 84 — days reach only 0.4°C, 24° 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

50.4° / -7.5°

Feb

51.5° / -6.3°

Mar

54.6° / -2.8°

Apr

149.8° / 1.8°

May

4014.9° / 6.6°

Jun

6219.2° / 10.8°

Jul

8022.1° / 14°

Aug

8422.2° / 14.3°

Sep

6319° / 11.5°

Oct

3313.6° / 6.7°

Nov

88.4° / 1.7°

Dec

53.7° / -3.5°

Monthly climate evidence for South Thomaston — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 20 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	0.4°C	-7.5°C	99 mm	8.8	5.5°C	9 h 13	5	Strong coverage
February	1.5°C	-6.3°C	87 mm	7.6	3.8°C	10 h 23	5	Strong coverage
March	4.6°C	-2.8°C	115 mm	8.9	3.3°C	11 h 47	5	Strong coverage
April	9.8°C	1.8°C	106 mm	9.4	4.7°C	13 h 23	14	Strong coverage
May	14.9°C	6.6°C	93 mm	10.1	7.7°C	14 h 44	40	Strong coverage
June	19.2°C	10.8°C	98 mm	9.4	11.3°C	15 h 28	62	Strong coverage
July	22.1°C	14°C	82 mm	8.9	14.7°C	15 h 11	80	Strong coverage
August	22.2°C	14.3°C	71 mm	7.1	15.6°C	14 h 00	84	Strong coverage
September	19°C	11.5°C	108 mm	7.7	14.1°C	12 h 27	63	Strong coverage
October	13.6°C	6.7°C	119 mm	9.5	11.8°C	10 h 55	33	Strong coverage
November	8.4°C	1.7°C	110 mm	9.3	9.6°C	9 h 34	8	Strong coverage
December	3.7°C	-3.5°C	116 mm	10.3	7.5°C	8 h 54	5	Strong coverage

Records at TENANTS HARBOR, 1989–2018
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	12.8°C25 Jan 2010	-24.4°C14 Jan 2004	101 mm24 Jan 1998	215 mm1998 · driest 17 mm in 2004	29
February	15.0°C22 Feb 2018	-22.2°C7 Feb 1993	74 mm24 Feb 2010	189 mm2008 · driest 23 mm in 2018	28
March	18.3°C21 Mar 2012	-18.3°C6 Mar 2007	83 mm19 Mar 1991	221 mm1991 · driest 21 mm in 2006	28
April	23.9°C11 Apr 2017	-10.0°C5 Apr 1995	86 mm16 Apr 2007	227 mm2007 · driest 13 mm in 1999	28
May	31.1°C25 May 2007	-0.6°C13 May 2018	58 mm23 May 2005	228 mm2005 · driest 23 mm in 2018	28
June	31.7°C13 Jun 2017	2.8°C5 Jun 2015	80 mm21 Jun 2015	238 mm2006 · driest 29 mm in 1994	30
July	32.8°C4 Jul 2018	5.6°C7 Jul 1991	78 mm22 Jul 2010	197 mm2010 · driest 27 mm in 2018	28
August	31.7°C27 Aug 2018	7.2°C27 Aug 1989	66 mm12 Aug 1990	172 mm1991 · driest 6 mm in 1996	30
September	30.6°C6 Sep 2018	1.1°C29 Sep 2000	151 mm30 Sep 2015	233 mm2008 · driest 5 mm in 2016	30
October	27.2°C10 Oct 2018	-2.8°C31 Oct 2001	107 mm8 Oct 2005	367 mm2005 · driest 18 mm in 2001	30
November	20.6°C3 Nov 1990	-12.2°C24 Nov 1989	107 mm15 Nov 1995	224 mm1995 · driest 22 mm in 2012	29
December	15.6°C7 Dec 1998	-23.9°C30 Dec 2017	62 mm10 Dec 2014	227 mm2014 · driest 31 mm in 2000	29

Typical days per month at TENANTS HARBOR, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	28	3	6
February	0	25	3	5
March	0	23	4	3
April	0	10	3	1
May	<1	<1	3	0
June	2	0	3	0
July	6	0	3	0
August	5	0	2	0
September	1	0	3	0
October	0	2	4	<1
November	0	12	4	<1
December	0	23	4	4

How often, not how much — every day in TENANTS HARBOR’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%	35%	-2.1–2.6°C
February	0%	28%	11%	31%	-1.3–3.2°C
March	0%	28%	13%	33%	3.4–6.5°C
April	<1%	31%	11%	41%	8.6–11.1°C
May	10%	32%	11%	38%	13.4–17.1°C
June	34%	31%	10%	38%	17.6–21.0°C
July	60%	28%	8%	33%	20.2–23.9°C
August	68%	23%	7%	21%	21.1–23.7°C
September	29%	26%	10%	26%	17.7–20.8°C
October	3%	31%	11%	40%	12.5–14.9°C
November	<1%	31%	12%	39%	6.9–9.7°C
December	0%	33%	13%	45%	1.2–5.8°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.

1991Each stripe is one year’s mean temperature against the 24-year average. Warmest: 2012. Coolest: 2004.2017

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4979277
NOAA station: USC00176881 · TENANTS HARBOR
Station distance: 9.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 44.05°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 20 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 TENANTS HARBOR is what differs

Saint George→Thomaston→Cushing→Friendship→Monhegan→Ash Point→

Or put two places side by side: South Thomaston vs Saint George

Best time to visitSouth Thomaston.

August

August

June

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
South Thomaston.

The whole year,
without the guesswork.

Nearby, measured,
and named.