United States · 1991–2020

Best time to visit
De Graff.

September leads for comfortable weather in De Graff: typically 24.4°C by day, 12.6°C at night, with 81 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.4°C

Typical low12.6°C

Rain in September81 mm

Comfort

September

September · August · June

84climate match

Beach

July

July · August · June

67climate match

Outdoors

October

October · May · September

74climate match

The weakest month is January, scoring 5 against September’s 84 — days reach only 0.8°C, 23° 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

50.8° / -7.9°

Feb

52.8° / -6.7°

Mar

78.6° / -1.8°

Apr

3615.9° / 3.9°

May

6721.8° / 10.5°

Jun

7226.4° / 15.7°

Jul

6628.1° / 17.3°

Aug

7327.4° / 16.5°

Sep

8424.4° / 12.6°

Oct

5317.6° / 6°

Nov

159.8° / 0.2°

Dec

53.5° / -4.6°

Monthly climate evidence for De Graff — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.8°C	-7.9°C	77 mm	9.7	9 h 35	5	Strong coverage
February	2.8°C	-6.7°C	61 mm	8.2	10 h 36	5	Strong coverage
March	8.6°C	-1.8°C	81 mm	9.6	11 h 49	7	Strong coverage
April	15.9°C	3.9°C	104 mm	11.1	13 h 13	36	Strong coverage
May	21.8°C	10.5°C	110 mm	11.5	14 h 23	67	Strong coverage
June	26.4°C	15.7°C	126 mm	9.9	15 h 02	72	Strong coverage
July	28.1°C	17.3°C	115 mm	8.8	14 h 47	66	Strong coverage
August	27.4°C	16.5°C	99 mm	7.7	13 h 46	73	Strong coverage
September	24.4°C	12.6°C	81 mm	7.1	12 h 24	84	Strong coverage
October	17.6°C	6°C	72 mm	7.7	11 h 04	53	Strong coverage
November	9.8°C	0.2°C	79 mm	8.4	9 h 53	15	Strong coverage
December	3.5°C	-4.6°C	78 mm	9.5	9 h 19	5	Strong coverage

What has changed

De Graff runs +0.2°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

+0.6

Feb

+0.6

Mar

+0.5

Apr

-0.3

May

0.0

Jun

0.0

Jul

-0.2

Aug

-0.4

Sep

+0.4

Oct

+0.5

Nov

-0.4

Dec

+1.6

September daytime highs, 2011–2025. Last recorded: 26.3°C.

Records at BELLEFONTAINE, 1894–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C21 Jan 1906	-32.8°C19 Jan 1994	84 mm12 Jan 2005	276 mm2005 · driest 9 mm in 1961	128
February	22.2°C25 Feb 2017	-29.4°C10 Feb 1899	58 mm14 Feb 2007	151 mm2011 · driest 4 mm in 1901	128
March	29.4°C24 Mar 1910	-24.4°C9 Mar 1984	143 mm25 Mar 1913	312 mm1913 · driest 2 mm in 1910	128
April	32.2°C28 Apr 1894	-12.8°C7 Apr 1982	71 mm21 Apr 1920	230 mm1920 · driest 17 mm in 1962	129
May	36.1°C28 May 1911	-5.0°C10 May 1966	96 mm17 May 2019	233 mm2026 · driest 14 mm in 1934	131
June	38.3°C26 Jun 1988	1.1°C8 Jun 1912	97 mm4 Jun 1905	313 mm2019 · driest 27 mm in 1959	130
July	41.1°C14 Jul 1936	5.0°C9 Jul 1918	114 mm16 Jul 1907	287 mm1992 · driest 10 mm in 1974	130
August	40.0°C6 Aug 1918	3.3°C29 Aug 1965	105 mm4 Aug 1943	209 mm2016 · driest 12 mm in 1996	129
September	36.7°C10 Sep 1919	-3.9°C28 Sep 1942	117 mm8 Sep 2020	256 mm2011 · driest 5 mm in 2023	130
October	32.2°C3 Oct 2019	-11.7°C29 Oct 1925	76 mm6 Oct 1910	188 mm1919 · driest 0 mm in 1963	130
November	26.7°C1 Nov 1933	-21.1°C30 Nov 1958	68 mm16 Nov 1955	229 mm1985 · driest 5 mm in 1904	130
December	21.7°C7 Dec 1998	-30.0°C22 Dec 1989	75 mm23 Dec 2004	244 mm1990 · driest 4 mm in 1955	130

Typical days per month at BELLEFONTAINE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	2
February	0	0	24	2	1
March	<1	0	21	3	<1
April	2	0	8	4	<1
May	10	2	<1	4	0
June	20	7	0	4	0
July	27	10	0	4	0
August	25	7	0	3	0
September	15	4	0	3	0
October	4	<1	5	2	0
November	<1	0	16	3	<1
December	0	0	25	2	2

How often, not how much — every day in BELLEFONTAINE’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%	30%	7%	33%	-2.2–4.9°C
February	<1%	27%	6%	29%	-1.2–6.8°C
March	6%	32%	9%	39%	5.3–13.3°C
April	20%	36%	11%	45%	13.2–19.1°C
May	44%	35%	12%	44%	19.1–25.2°C
June	66%	31%	12%	35%	24.6–28.7°C
July	72%	28%	11%	29%	27.0–30.9°C
August	74%	25%	9%	24%	26.0–29.6°C
September	67%	23%	8%	21%	22.6–27.0°C
October	33%	24%	7%	24%	15.6–20.8°C
November	5%	28%	8%	31%	7.1–12.8°C
December	<1%	29%	7%	34%	-0.2–6.4°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.

1895Each stripe is one year’s mean temperature against the 118-year average. Warmest: 2024. Coolest: 1917.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5151775
NOAA station: USC00330563 · BELLEFONTAINE
Station distance: 12.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 40.31°, 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 BELLEFONTAINE is what differs

Bellefontaine→Northwood→West Liberty→North Lewisburg→Russells Point→Lakeview→

Or put two places side by side: De Graff vs Bellefontaine

Best time to visitDe Graff.