United States · 1991–2020

Best time to visit
Porter.

August leads for comfortable weather in Porter: typically 25.4°C by day, 12°C at night, with 95 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high25.4°C

Typical low12°C

Rain in August95 mm

Comfort

August

August · July · June

76climate match

Beach

July

July · August · June

48climate match

Outdoors

September

September · May · June

74climate match

The weakest month is January, scoring 5 against August’s 76 — days reach only -2.1°C, 26° below the 24°C the score treats as ideal, and nights drop to -14.6°C.

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

5-2.1° / -14.6°

Feb

5-0.3° / -14.2°

Mar

54.4° / -8°

Apr

1512.2° / -1.4°

May

4918.7° / 4.6°

Jun

7323.6° / 10.5°

Jul

7425.8° / 12.8°

Aug

7625.4° / 12°

Sep

6020.8° / 7.6°

Oct

2313.8° / 1.2°

Nov

57° / -3.3°

Dec

51.1° / -9.7°

Monthly climate evidence for Porter — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-2.1°C	-14.6°C	84 mm	9.2	9 h 15	5	Good coverage
February	-0.3°C	-14.2°C	80 mm	7.2	10 h 24	5	Good coverage
March	4.4°C	-8°C	110 mm	8.6	11 h 47	5	Good coverage
April	12.2°C	-1.4°C	116 mm	8.9	13 h 22	15	Good coverage
May	18.7°C	4.6°C	96 mm	10.5	14 h 42	49	Good coverage
June	23.6°C	10.5°C	107 mm	11.6	15 h 26	73	Good coverage
July	25.8°C	12.8°C	101 mm	10.4	15 h 09	74	Good coverage
August	25.4°C	12°C	95 mm	9.5	13 h 59	76	Good coverage
September	20.8°C	7.6°C	113 mm	8.5	12 h 27	60	Good coverage
October	13.8°C	1.2°C	132 mm	9.1	10 h 56	23	Good coverage
November	7°C	-3.3°C	119 mm	9.6	9 h 35	5	Good coverage
December	1.1°C	-9.7°C	104 mm	9.4	8 h 56	5	Good coverage

Records at EAST HIRAM, 1970–2009
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.8°C7 Jan 2007	-37.2°C20 Jan 1971	64 mm11 Jan 1983	253 mm1979 · driest 10 mm in 2004	38
February	17.8°C23 Feb 1997	-36.1°C13 Feb 1979	73 mm15 Feb 2007	222 mm2008 · driest 10 mm in 1987	38
March	26.1°C31 Mar 1977	-30.0°C7 Mar 2007	94 mm20 Mar 1983	307 mm1983 · driest 26 mm in 1988	38
April	33.3°C28 Apr 1990	-13.3°C9 Apr 1971	99 mm29 Apr 1988	296 mm2007 · driest 10 mm in 1999	38
May	34.4°C23 May 1977	-5.6°C9 May 1985	75 mm12 May 1989	258 mm1984 · driest 22 mm in 2008	38
June	34.4°C20 Jun 1995	-1.1°C3 Jun 1986	94 mm14 Jun 1998	280 mm1998 · driest 18 mm in 1979	37
July	36.7°C21 Jul 1977	2.2°C2 Jul 1978	82 mm14 Jul 1996	221 mm1988 · driest 30 mm in 1987	38
August	38.9°C3 Aug 1975	-1.1°C31 Aug 1976	99 mm20 Aug 1991	252 mm1991 · driest 23 mm in 2001	38
September	34.4°C10 Sep 2002	-5.0°C27 Sep 1978	173 mm17 Sep 1999	285 mm1999 · driest 6 mm in 1978	38
October	30.0°C3 Oct 1971	-11.1°C21 Oct 1972	137 mm22 Oct 1996	434 mm2005 · driest 13 mm in 1994	38
November	23.3°C5 Nov 1987	-21.1°C23 Nov 1972	105 mm2 Nov 1988	305 mm1983 · driest 10 mm in 1980	39
December	20.6°C8 Dec 1998	-31.7°C12 Dec 1977	70 mm22 Dec 1993	285 mm1973 · driest 35 mm in 1982	38

Typical days per month at EAST HIRAM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	3	8
February	0	0	28	3	6
March	0	0	30	4	6
April	1	<1	21	4	2
May	5	1	5	3	0
June	14	3	0	3	0
July	20	4	0	4	0
August	18	4	0	3	0
September	5	<1	2	3	0
October	<1	0	15	3	<1
November	0	0	24	4	2
December	0	0	30	4	6

How often, not how much — every day in EAST HIRAM’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%	-5.0–1.1°C
February	0%	26%	9%	25%	-2.7–2.0°C
March	<1%	28%	11%	34%	3.1–7.4°C
April	10%	31%	12%	38%	10.2–14.3°C
May	36%	33%	11%	46%	16.7–21.2°C
June	56%	38%	11%	48%	22.1–25.8°C
July	68%	30%	11%	40%	24.2–28.1°C
August	68%	30%	9%	30%	23.8–27.4°C
September	48%	27%	10%	29%	19.6–22.6°C
October	12%	28%	11%	34%	12.6–16.1°C
November	1%	33%	13%	43%	5.1–9.5°C
December	<1%	31%	12%	39%	-1.5–3.9°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.

1971Each stripe is one year’s mean temperature against the 35-year average. Warmest: 2006. Coolest: 1972.2008

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4975783
NOAA station: USC00172238 · EAST HIRAM
Station distance: 17 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 43.80°, 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 EAST HIRAM is what differs

Parsonsfield→Hiram→Effingham→Cornish→Denmark→Convene→

Or put two places side by side: Porter vs Parsonsfield

Best time to visitPorter.