United States · 1991–2020

Best time to visit
Glen Allen.

September leads for comfortable weather in Glen Allen: typically 27.3°C by day, 15.3°C at night, with 108 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high27.3°C

Typical low15.3°C

Rain in September108 mm

Comfort

September

September · May · October

75climate match

Beach

July

July · June · August

71climate match

Outdoors

October

October · April · November

79climate match

The weakest month is January, scoring 9 against September’s 75 — days reach only 8.9°C, 15° below the 24°C the score treats as ideal, and nights drop to -2.3°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

98.9° / -2.3°

Feb

2011° / -1.3°

Mar

3715.5° / 2.2°

Apr

6421.2° / 7.4°

May

7425.5° / 12.7°

Jun

6129.7° / 17.5°

Jul

5131.7° / 19.8°

Aug

5330.9° / 19.1°

Sep

7527.3° / 15.3°

Oct

6921.5° / 8.8°

Nov

4015.7° / 3°

Dec

1610.9° / -0.6°

Monthly climate evidence for Glen Allen — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	8.9°C	-2.3°C	78 mm	7.6	9 h 49	9	Good coverage
February	11°C	-1.3°C	67 mm	7	10 h 44	20	Good coverage
March	15.5°C	2.2°C	85 mm	8.6	11 h 50	37	Good coverage
April	21.2°C	7.4°C	91 mm	8.6	13 h 07	64	Good coverage
May	25.5°C	12.7°C	113 mm	9.8	14 h 11	74	Good coverage
June	29.7°C	17.5°C	112 mm	8.2	14 h 45	61	Good coverage
July	31.7°C	19.8°C	101 mm	8.9	14 h 32	51	Good coverage
August	30.9°C	19.1°C	125 mm	8	13 h 37	53	Good coverage
September	27.3°C	15.3°C	108 mm	6.7	12 h 23	75	Good coverage
October	21.5°C	8.8°C	97 mm	6.5	11 h 09	69	Good coverage
November	15.7°C	3°C	86 mm	6.6	10 h 05	40	Good coverage
December	10.9°C	-0.6°C	96 mm	7.7	9 h 34	16	Good coverage

Records at ASHLAND HANOVER CO MUNI AP, 1996–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	29.4°C30 Jan 2002	-20.6°C28 Jan 2000	90 mm1 Jan 2007	160 mm2024 · driest 39 mm in 2004	30
February	28.3°C23 Feb 2023	-19.9°C20 Feb 2015	51 mm29 Feb 2012	126 mm2003 · driest 16 mm in 2009	30
March	32.2°C30 Mar 1998	-14.3°C4 Mar 2014	66 mm20 Mar 2003	208 mm2024 · driest 6 mm in 2006	30
April	35.6°C17 Apr 2002	-3.9°C6 Apr 2004	104 mm20 Apr 2008	231 mm2008 · driest 23 mm in 2001	30
May	36.1°C20 May 2026	-0.5°C10 May 2020	126 mm18 May 2018	263 mm2016 · driest 23 mm in 1999	30
June	38.9°C26 Jun 2024	5.0°C5 Jun 1997	89 mm3 Jun 2009	281 mm2015 · driest 9 mm in 2010	30
July	40.6°C24 Jul 2010	10.0°C3 Jul 2001	78 mm23 Jul 2011	220 mm2026 · driest 28 mm in 2014	31
August	39.4°C9 Aug 2007	10.0°C20 Aug 1998	270 mm30 Aug 2004	541 mm2004 · driest 0 mm in 2006	30
September	37.2°C7 Sep 2023	5.0°C24 Sep 1998	134 mm16 Sep 1999	390 mm1999 · driest 1 mm in 2005	30
October	36.1°C2 Oct 2019	-2.8°C23 Oct 1997	118 mm11 Oct 2018	200 mm2006 · driest 4 mm in 2000	30
November	29.4°C7 Nov 2024	-9.3°C19 Nov 2014	86 mm12 Nov 2009	289 mm2009 · driest 2 mm in 2012	30
December	27.8°C10 Dec 2007	-13.2°C24 Dec 2022	74 mm11 Dec 2008	230 mm2009 · driest 21 mm in 2017	30

Typical days per month at ASHLAND HANOVER CO MUNI AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	22	3
February	<1	0	19	2
March	3	<1	13	3
April	9	2	2	3
May	18	7	0	4
June	27	16	0	4
July	30	23	0	3
August	29	21	0	4
September	22	8	0	3
October	8	2	1	3
November	1	0	10	3
December	<1	0	20	3

How often, not how much — every day in ASHLAND HANOVER CO 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	4%	24%	9%	20%	6.5–12.0°C
February	8%	26%	8%	27%	7.3–13.7°C
March	24%	28%	10%	30%	12.8–18.8°C
April	47%	27%	9%	31%	19.8–23.6°C
May	62%	32%	12%	41%	23.1–27.4°C
June	74%	26%	12%	31%	28.2–31.9°C
July	71%	29%	11%	36%	30.0–33.5°C
August	73%	27%	12%	26%	28.6–32.5°C
September	75%	23%	10%	24%	25.2–30.3°C
October	55%	20%	9%	20%	20.1–23.3°C
November	21%	21%	8%	18%	12.9–18.2°C
December	6%	25%	10%	23%	8.2–14.5°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.

1997Each stripe is one year’s mean temperature against the 29-year average. Warmest: 2024. Coolest: 1997.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4761054
NOAA station: USW00093775 · ASHLAND HANOVER CO MUNI AP
Station distance: 7.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 37.67°, 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 ASHLAND HANOVER CO MUNI AP is what differs

Tuckahoe→Laurel→Lakeside→Dumbarton→Chamberlayne→Laurel Park→

Or put two places side by side: Glen Allen vs Tuckahoe

Best time to visitGlen Allen.