United States · 1991–2020

Best time to visit
Hartford.

September leads for comfortable weather in Hartford: typically 23.1°C by day, 9.4°C at night, with 86 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.1°C

Typical low9.4°C

Rain in September86 mm

Comfort

September

September · August · June

76climate match

Beach

July

July · August · June

58climate match

Outdoors

September

September · May · June

76climate match

The weakest month is January, scoring 5 against September’s 76 — days reach only -1°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° / -12.5°

Feb

50.9° / -11.6°

Mar

56° / -6.3°

Apr

2713.7° / -0.1°

May

6121° / 6.4°

Jun

7225.2° / 11.3°

Jul

6828.1° / 14.3°

Aug

7427.2° / 13.4°

Sep

7623.1° / 9.4°

Oct

3415.3° / 3.1°

Nov

88.4° / -2.2°

Dec

51.8° / -7.9°

Monthly climate evidence for Hartford — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-1°C	-12.5°C	56 mm	7.3	9 h 16	5	Good coverage
February	0.9°C	-11.6°C	56 mm	6.9	10 h 25	5	Good coverage
March	6°C	-6.3°C	65 mm	7.2	11 h 47	5	Good coverage
April	13.7°C	-0.1°C	75 mm	9.2	13 h 22	27	Good coverage
May	21°C	6.4°C	86 mm	10.4	14 h 41	61	Good coverage
June	25.2°C	11.3°C	109 mm	11.1	15 h 25	72	Good coverage
July	28.1°C	14.3°C	109 mm	10.2	15 h 08	68	Good coverage
August	27.2°C	13.4°C	94 mm	8.3	13 h 59	74	Good coverage
September	23.1°C	9.4°C	86 mm	7	12 h 27	76	Good coverage
October	15.3°C	3.1°C	107 mm	9.4	10 h 56	34	Good coverage
November	8.4°C	-2.2°C	71 mm	8.3	9 h 36	8	Good coverage
December	1.8°C	-7.9°C	76 mm	8.6	8 h 57	5	Good coverage

What has changed

Hartford runs +1.9°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

+2.0

Feb

+1.7

Mar

+1.4

Apr

+1.3

May

+1.7

Jun

+1.3

Jul

+1.7

Aug

+2.1

Sep

+2.9

Oct

+2.0

Nov

+1.5

Dec

+2.7

September daytime highs, 2011–2025. Last recorded: 25.5°C.

Records at LEBANON MUNI AP, 1962–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C6 Jan 2007	-34.4°C11 Jan 1968	39 mm22 Jan 1987	151 mm1979 · driest 11 mm in 1970	54
February	20.0°C21 Feb 2018	-33.9°C3 Feb 1971	55 mm25 Feb 1981	167 mm1981 · driest 2 mm in 1987	55
March	29.4°C22 Mar 2012	-31.0°C7 Mar 2007	51 mm23 Mar 2024	158 mm2024 · driest 10 mm in 1965	55
April	32.8°C28 Apr 2009	-16.6°C5 Apr 2016	48 mm3 Apr 1975	130 mm1983 · driest 12 mm in 1999	55
May	35.6°C26 May 2010	-6.7°C3 May 1966	63 mm29 May 1984	227 mm1984 · driest 18 mm in 2008	56
June	37.8°C24 Jun 2025	0.0°C4 Jun 2002	53 mm27 Jun 1987	233 mm2006 · driest 21 mm in 1999	56
July	37.2°C20 Jul 1977	3.3°C7 Jul 1965	96 mm29 Jul 1969	228 mm2021 · driest 15 mm in 1963	56
August	36.7°C4 Aug 2022	-1.1°C31 Aug 1965	97 mm8 Aug 1983	254 mm1983 · driest 34 mm in 1965	54
September	35.0°C9 Sep 2002	-6.7°C24 Sep 1963	119 mm16 Sep 1999	227 mm1999 · driest 14 mm in 1964	55
October	30.6°C7 Oct 1963	-10.6°C8 Oct 1964	93 mm8 Oct 2005	267 mm2005 · driest 7 mm in 1963	55
November	25.6°C5 Nov 2022	-16.6°C29 Nov 2014	43 mm5 Nov 1969	173 mm1983 · driest 13 mm in 2012	55
December	20.6°C7 Dec 1998	-32.1°C30 Dec 2017	57 mm21 Dec 1973	181 mm1973 · driest 5 mm in 2005	55

Typical days per month at LEBANON MUNI AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	30	2
February	0	0	27	2
March	<1	0	27	2
April	2	<1	17	3
May	8	2	3	3
June	17	5	<1	4
July	26	11	0	3
August	24	7	0	3
September	10	2	<1	3
October	2	0	10	4
November	0	0	21	3
December	0	0	28	3

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 85); on 2011–2025 it is September (84). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in LEBANON MUNI AP’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%	25%	6%	26%	-4.8–1.2°C
February	<1%	24%	6%	23%	-2.6–3.7°C
March	2%	26%	7%	31%	3.2–8.9°C
April	14%	30%	9%	39%	10.6–15.9°C
May	43%	32%	10%	41%	17.6–23.7°C
June	61%	33%	11%	42%	23.0–27.2°C
July	70%	30%	10%	33%	25.9–29.8°C
August	71%	27%	9%	29%	24.9–28.6°C
September	55%	25%	9%	25%	19.9–24.3°C
October	17%	26%	9%	29%	12.7–17.9°C
November	2%	30%	10%	36%	4.9–11.0°C
December	<1%	29%	9%	35%	-1.7–4.1°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.

1963Each stripe is one year’s mean temperature against the 52-year average. Warmest: 2023. Coolest: 2003.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5236879
NOAA station: USW00094765 · LEBANON MUNI AP
Station distance: 4.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 43.66°, 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 LEBANON MUNI AP is what differs

Lebanon→White River Junction→Windsor→Enfield→Hartland→North Hartland→

Or put two places side by side: Hartford vs Lebanon

Best time to visitHartford.

September

July

September

The whole year,without the guesswork.

Hartford runs +1.9°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Hartford.

The whole year,
without the guesswork.

Hartford runs +1.9°C
on the 1961–1990 baseline.

Nearby, measured,
and named.