United States · 1991–2020

Best time to visit
Spring Grove.

September leads for comfortable weather in Spring Grove: typically 25.2°C by day, 12.3°C at night, with 79 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.2°C

Typical low12.3°C

Rain in September79 mm

Comfort

September

September · August · May

82climate match

Beach

August

August · July · June

74climate match

Outdoors

October

October · September · May

75climate match

The weakest month is January, scoring 5 against September’s 82 — days reach only 2.2°C, 22° 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

52.2° / -6.9°

Feb

54.4° / -5.4°

Mar

1410.3° / -0.7°

Apr

4317.5° / 4.9°

May

7023° / 10.8°

Jun

6827.6° / 15.7°

Jul

6329.2° / 17.4°

Aug

7328.4° / 16.6°

Sep

8225.2° / 12.3°

Oct

5518.5° / 6°

Nov

2010.8° / 0.4°

Dec

54.5° / -4°

Monthly climate evidence for Spring Grove — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.2°C	-6.9°C	85 mm	9.3	9 h 38	5	Strong coverage
February	4.4°C	-5.4°C	59 mm	7.6	10 h 38	5	Strong coverage
March	10.3°C	-0.7°C	87 mm	9.1	11 h 49	14	Strong coverage
April	17.5°C	4.9°C	113 mm	9.8	13 h 12	43	Strong coverage
May	23°C	10.8°C	116 mm	11.6	14 h 21	70	Strong coverage
June	27.6°C	15.7°C	121 mm	10	14 h 59	68	Strong coverage
July	29.2°C	17.4°C	107 mm	8.9	14 h 44	63	Strong coverage
August	28.4°C	16.6°C	82 mm	6.7	13 h 44	73	Strong coverage
September	25.2°C	12.3°C	79 mm	6.6	12 h 24	82	Strong coverage
October	18.5°C	6°C	79 mm	7.7	11 h 05	55	Strong coverage
November	10.8°C	0.4°C	83 mm	7.3	9 h 55	20	Strong coverage
December	4.5°C	-4°C	79 mm	9.1	9 h 21	5	Strong coverage

What has changed

Spring Grove runs +0.6°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

+1.1

Feb

+1.4

Mar

+0.8

Apr

+0.2

May

+0.5

Jun

+0.5

Jul

-0.3

Aug

-0.5

Sep

+0.7

Oct

+0.9

Nov

0.0

Dec

+2.1

September daytime highs, 2011–2025. Last recorded: 26.7°C.

Records at RICHMOND WTR WKS, 1968–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.9°C30 Jan 2013	-32.8°C19 Jan 1994	81 mm21 Jan 1999	243 mm2005 · driest 5 mm in 1981	57
February	25.6°C20 Feb 2018	-28.9°C3 Feb 1985	51 mm23 Feb 1975	169 mm2019 · driest 6 mm in 1978	58
March	29.4°C22 Mar 2026	-22.8°C5 Mar 1978	58 mm3 Mar 2023	180 mm2008 · driest 21 mm in 1999	58
April	30.6°C22 Apr 1985	-10.0°C7 Apr 1982	94 mm4 Apr 2011	292 mm2011 · driest 24 mm in 2003	58
May	34.4°C28 May 2012	-3.3°C7 May 1974	87 mm24 May 2017	243 mm2017 · driest 26 mm in 2007	58
June	40.0°C28 Jun 2012	2.2°C4 Jun 1969	81 mm23 Jun 2017	238 mm1998 · driest 28 mm in 1988	57
July	38.9°C6 Jul 2012	5.6°C6 Jul 1972	107 mm20 Jul 1969	295 mm2003 · driest 13 mm in 2009	56
August	37.8°C9 Aug 2007	5.0°C2 Aug 1976	73 mm30 Aug 2005	227 mm1979 · driest 13 mm in 1996	56
September	37.8°C4 Sep 2011	-1.1°C23 Sep 1974	78 mm27 Sep 2024	213 mm2012 · driest 4 mm in 1998	57
October	32.8°C2 Oct 2019	-8.9°C28 Oct 1976	115 mm1 Oct 1986	220 mm1986 · driest 9 mm in 2024	57
November	26.7°C2 Nov 2016	-14.4°C29 Nov 1976	81 mm5 Nov 2017	227 mm1985 · driest 5 mm in 2009	57
December	22.2°C2 Dec 1982	-30.0°C22 Dec 1989	113 mm21 Dec 2013	211 mm1990 · driest 10 mm in 1976	58

Typical days per month at RICHMOND WTR WKS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	25	2	4
February	0	0	23	2	3
March	<1	0	18	3	1
April	4	<1	6	4	<1
May	13	4	<1	4	0
June	23	10	0	4	0
July	28	14	0	4	0
August	26	10	0	2	0
September	17	5	<1	2	0
October	5	<1	4	3	0
November	<1	0	15	3	<1
December	0	0	23	3	3

How often, not how much — every day in RICHMOND WTR WKS’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%	27%	8%	32%	-1.7–5.4°C
February	<1%	26%	7%	28%	-0.1–7.9°C
March	9%	30%	10%	36%	7.4–13.9°C
April	25%	33%	12%	43%	14.6–19.5°C
May	49%	35%	12%	47%	20.2–26.1°C
June	67%	32%	13%	39%	25.6–29.1°C
July	73%	27%	12%	28%	27.6–31.3°C
August	78%	22%	9%	21%	26.5–30.3°C
September	69%	22%	8%	21%	23.0–27.2°C
October	33%	26%	9%	29%	16.1–20.3°C
November	7%	26%	10%	28%	7.2–13.7°C
December	<1%	29%	9%	34%	1.3–8.2°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.

1969Each stripe is one year’s mean temperature against the 54-year average. Warmest: 2012. Coolest: 1978.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4265204
NOAA station: USC00127370 · RICHMOND WTR WKS
Station distance: 1.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 39.85°, 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 RICHMOND WTR WKS is what differs

Richmond→Centerville→New Paris→Fountain City→Eldorado→Spring Grove Heights→

Or put two places side by side: Spring Grove vs Richmond

Best time to visitSpring Grove.