United States · 1991–2020

Best time to visit
Hanover.

September leads for comfortable weather in Hanover: typically 25.1°C by day, 12.6°C at night, with 124 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.1°C

Typical low12.6°C

Rain in September124 mm

Comfort

September

September · June · May

75climate match

Beach

August

August · July · June

71climate match

Outdoors

October

October · May · April

73climate match

The weakest month is January, scoring 5 against September’s 75 — days reach only 3.9°C, 20° 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

53.9° / -6.4°

Feb

55.5° / -5.3°

Mar

1310.4° / -1.4°

Apr

4617.4° / 4.4°

May

6922.4° / 10°

Jun

7427.3° / 15.4°

Jul

6029.7° / 17.8°

Aug

6828.8° / 16.7°

Sep

7525.1° / 12.6°

Oct

5418.7° / 6.1°

Nov

2712.5° / 0.6°

Dec

56.6° / -3.6°

Monthly climate evidence for Hanover — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.9°C	-6.4°C	79 mm	8.1	9 h 38	5	Strong coverage
February	5.5°C	-5.3°C	68 mm	6.9	10 h 38	5	Strong coverage
March	10.4°C	-1.4°C	91 mm	8.3	11 h 49	13	Strong coverage
April	17.4°C	4.4°C	91 mm	9.4	13 h 12	46	Strong coverage
May	22.4°C	10°C	103 mm	10.6	14 h 21	69	Strong coverage
June	27.3°C	15.4°C	98 mm	9.5	14 h 58	74	Strong coverage
July	29.7°C	17.8°C	112 mm	9	14 h 44	60	Strong coverage
August	28.8°C	16.7°C	100 mm	7.9	13 h 44	68	Strong coverage
September	25.1°C	12.6°C	124 mm	7.9	12 h 24	75	Strong coverage
October	18.7°C	6.1°C	99 mm	7.3	11 h 05	54	Strong coverage
November	12.5°C	0.6°C	79 mm	6.6	9 h 56	27	Strong coverage
December	6.6°C	-3.6°C	89 mm	8.2	9 h 22	5	Strong coverage

Records at HANOVER 4 SW, 1993–2021
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.1°C8 Jan 2008	-25.6°C19 Jan 1994	58 mm14 Jan 2005	152 mm1998 · driest 29 mm in 2008	27
February	26.7°C22 Feb 2018	-26.7°C5 Feb 1996	55 mm14 Feb 2007	133 mm1998 · driest 8 mm in 2002	27
March	30.6°C31 Mar 1998	-22.8°C6 Mar 2015	70 mm22 Mar 2019	170 mm1994 · driest 12 mm in 2006	27
April	32.8°C18 Apr 2002	-7.2°C7 Apr 2002	55 mm16 Apr 2018	182 mm2011 · driest 39 mm in 1997	27
May	33.9°C21 May 1996	-2.8°C14 May 1996	55 mm3 May 2016	167 mm2016 · driest 25 mm in 2007	26
June	36.1°C30 Jun 2012	3.9°C9 Jun 1998	86 mm28 Jun 2006	247 mm2015 · driest 19 mm in 1994	25
July	38.9°C23 Jul 2011	7.2°C30 Jul 1997	94 mm22 Jul 2018	242 mm2005 · driest 45 mm in 2001	26
August	36.7°C3 Aug 2002	6.7°C21 Aug 2000	79 mm28 Aug 2011	179 mm2009 · driest 35 mm in 2016	28
September	35.0°C2 Sep 2010	-0.6°C21 Sep 2020	159 mm2 Sep 2021	319 mm2021 · driest 2 mm in 2005	29
October	32.8°C10 Oct 2007	-6.1°C23 Oct 1997	129 mm30 Oct 2012	232 mm2012 · driest 11 mm in 2000	27
November	27.8°C5 Nov 2003	-10.6°C30 Nov 1995	69 mm8 Nov 1997	220 mm2018 · driest 24 mm in 1998	27
December	25.0°C8 Dec 1998	-18.3°C7 Dec 2002	66 mm5 Dec 1993	158 mm1996 · driest 28 mm in 1998	27

Typical days per month at HANOVER 4 SW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	3	4
February	<1	0	24	3	4
March	<1	0	20	3	2
April	4	<1	6	3	<1
May	11	3	<1	4	0
June	23	9	0	3	0
July	29	16	0	4	0
August	28	12	0	3	0
September	16	4	<1	3	0
October	4	<1	4	3	0
November	<1	0	16	3	<1
December	0	0	25	3	2

How often, not how much — every day in HANOVER 4 SW’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	<1%	26%	9%	28%	0.7–7.2°C
February	1%	25%	9%	27%	2.2–8.5°C
March	8%	27%	11%	30%	7.3–14.2°C
April	25%	31%	10%	43%	15.7–19.4°C
May	48%	34%	12%	46%	20.4–24.9°C
June	67%	32%	11%	36%	26.1–28.7°C
July	71%	29%	12%	36%	28.0–32.0°C
August	74%	26%	10%	27%	26.8–30.3°C
September	69%	27%	11%	29%	23.3–27.2°C
October	35%	24%	10%	24%	17.1–20.5°C
November	9%	22%	9%	21%	9.3–15.6°C
December	2%	26%	11%	28%	3.4–10.3°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.

1994Each stripe is one year’s mean temperature against the 24-year average. Warmest: 2012. Coolest: 2014.2018

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4558475
NOAA station: USC00363665 · HANOVER 4 SW
Station distance: 5.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 39.80°, 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 HANOVER 4 SW is what differs

Westminster→Parkville→Mount Pleasant→Littlestown→McSherrystown→Midway→

Or put two places side by side: Hanover vs Westminster

Best time to visitHanover.