United States · 1991–2020

Best time to visit
Harvard.

September leads for comfortable weather in Harvard: typically 24.4°C by day, 10.7°C at night, with 74 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.4°C

Typical low10.7°C

Rain in September74 mm

Comfort

September

September · June · August

83climate match

Beach

July

July · August · June

68climate match

Outdoors

September

September · May · October

75climate match

The weakest month is January, scoring 5 against September’s 83 — days reach only -1.7°C, 26° 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

5-1.7° / -11.1°

Feb

50.4° / -9.6°

Mar

77.6° / -3.4°

Apr

3314.8° / 2.2°

May

6221.4° / 8.3°

Jun

7126.9° / 14.2°

Jul

6828.7° / 16.3°

Aug

7127.9° / 15.4°

Sep

8324.4° / 10.7°

Oct

4917.2° / 4.1°

Nov

138.7° / -1.9°

Dec

51.2° / -7.4°

Monthly climate evidence for Harvard — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-1.7°C	-11.1°C	39 mm	5.6	9 h 23	5	Good coverage
February	0.4°C	-9.6°C	35 mm	4.7	10 h 29	5	Good coverage
March	7.6°C	-3.4°C	59 mm	6.1	11 h 48	7	Good coverage
April	14.8°C	2.2°C	95 mm	9.1	13 h 18	33	Good coverage
May	21.4°C	8.3°C	113 mm	10.1	14 h 34	62	Good coverage
June	26.9°C	14.2°C	125 mm	9	15 h 16	71	Good coverage
July	28.7°C	16.3°C	107 mm	7.8	15 h	68	Good coverage
August	27.9°C	15.4°C	116 mm	8	13 h 54	71	Good coverage
September	24.4°C	10.7°C	74 mm	6	12 h 26	83	Strong coverage
October	17.2°C	4.1°C	74 mm	6.9	10 h 59	49	Strong coverage
November	8.7°C	-1.9°C	58 mm	5.9	9 h 43	13	Strong coverage
December	1.2°C	-7.4°C	45 mm	5.8	9 h 05	5	Good coverage

Records at MARENGO, 1893–2018
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.7°C24 Jan 1967	-33.9°C11 Jan 1979	75 mm24 Jan 1938	114 mm1965 · driest 3 mm in 1981	121
February	22.8°C25 Feb 1932	-32.8°C13 Feb 1905	36 mm2 Feb 2011	78 mm1900 · driest 0 mm in 1969	119
March	28.9°C30 Mar 1986	-26.7°C8 Mar 1943	53 mm19 Mar 1948	161 mm1976 · driest 5 mm in 2018	117
April	34.4°C30 Apr 1926	-14.4°C7 Apr 1982	100 mm18 Apr 2013	200 mm1993 · driest 2 mm in 2018	119
May	41.7°C31 May 1934	-6.1°C6 May 2014	85 mm13 May 2010	251 mm1996 · driest 11 mm in 1934	117
June	41.7°C1 Jun 1934	-1.7°C11 Jun 1972	131 mm13 Jun 1999	264 mm1993 · driest 5 mm in 1922	119
July	42.8°C14 Jul 1936	3.9°C5 Jul 1972	103 mm2 Jul 1978	232 mm2017 · driest 8 mm in 1894	122
August	41.7°C5 Aug 1918	2.8°C30 Aug 1915	208 mm22 Aug 2002	361 mm2007 · driest 11 mm in 1893	122
September	39.4°C8 Sep 1922	-4.4°C30 Sep 1899	229 mm7 Sep 1894	398 mm1894 · driest 0 mm in 2017	123
October	32.2°C6 Oct 1963	-13.3°C29 Oct 1925	81 mm10 Oct 1954	194 mm1941 · driest 0 mm in 1952	123
November	26.7°C1 Nov 1933	-27.2°C30 Nov 1947	73 mm3 Nov 1935	159 mm1985 · driest 3 mm in 1999	121
December	19.4°C4 Dec 2012	-32.2°C27 Dec 1950	59 mm5 Dec 1909	147 mm2015 · driest 0 mm in 2014	118

Typical days per month at MARENGO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	1	5
February	0	0	25	<1	3
March	<1	0	22	2	1
April	2	0	10	3	<1
May	9	3	1	4	0
June	21	9	0	4	0
July	26	11	0	3	0
August	25	9	0	3	0
September	15	4	<1	2	0
October	4	<1	7	3	0
November	0	0	19	2	<1
December	0	0	27	1	3

How often, not how much — every day in MARENGO’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%	18%	4%	13%	-6.0–1.7°C
February	<1%	19%	3%	16%	-4.1–3.5°C
March	3%	23%	7%	26%	2.9–10.1°C
April	18%	28%	10%	33%	11.7–17.7°C
May	45%	29%	10%	35%	18.5–24.3°C
June	67%	28%	12%	32%	24.3–29.1°C
July	76%	24%	10%	25%	27.6–31.2°C
August	75%	24%	10%	24%	26.1–30.1°C
September	61%	24%	10%	23%	21.9–26.6°C
October	29%	21%	8%	21%	14.4–20.2°C
November	3%	22%	7%	19%	4.9–10.7°C
December	0%	20%	5%	16%	-3.2–3.8°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.

1893Each stripe is one year’s mean temperature against the 105-year average. Warmest: 1921. Coolest: 1893.2016

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4895282
NOAA station: USC00115326 · MARENGO
Station distance: 17.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 42.42°, 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 MARENGO is what differs

Woodstock→Belvidere→Marengo→Hampshire→Capron→Timberlane→

Or put two places side by side: Harvard vs Woodstock

Best time to visitHarvard.

September

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Harvard.

The whole year,
without the guesswork.

Nearby, measured,
and named.