United States · 1991–2020

Best time to visit
Dennison.

September leads for comfortable weather in Dennison: typically 25.3°C by day, 10.4°C at night, with 81 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.3°C

Typical low10.4°C

Rain in September81 mm

Comfort

September

September · August · May

77climate match

Beach

July

July · August · June

65climate match

Outdoors

September

September · October · May

70climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 2.5°C, 21° 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

52.5° / -7.6°

Feb

54.6° / -6.7°

Mar

1010.3° / -2.6°

Apr

3917.6° / 2.6°

May

6723.3° / 8.3°

Jun

6727.6° / 13.1°

Jul

6629.9° / 15.6°

Aug

6929° / 14.3°

Sep

7725.3° / 10.4°

Oct

5018.2° / 4.1°

Nov

1911.3° / -0.6°

Dec

55.1° / -4.5°

Monthly climate evidence for Dennison — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.5°C	-7.6°C	80 mm	9.4	9 h 35	5	Good coverage
February	4.6°C	-6.7°C	61 mm	7.5	10 h 36	5	Strong coverage
March	10.3°C	-2.6°C	90 mm	9.6	11 h 49	10	Strong coverage
April	17.6°C	2.6°C	102 mm	11.9	13 h 13	39	Strong coverage
May	23.3°C	8.3°C	111 mm	12.3	14 h 24	67	Strong coverage
June	27.6°C	13.1°C	117 mm	10.5	15 h 02	67	Good coverage
July	29.9°C	15.6°C	94 mm	9.1	14 h 47	66	Strong coverage
August	29°C	14.3°C	98 mm	7.9	13 h 46	69	Strong coverage
September	25.3°C	10.4°C	81 mm	7.5	12 h 25	77	Strong coverage
October	18.2°C	4.1°C	80 mm	8.3	11 h 03	50	Good coverage
November	11.3°C	-0.6°C	77 mm	8.6	9 h 53	19	Strong coverage
December	5.1°C	-4.5°C	81 mm	9.8	9 h 18	5	Good coverage

Records at DENNISON WTR WKS, 1988–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.2°C24 Jan 1999	-36.1°C20 Jan 1994	55 mm5 Jan 2005	183 mm2005 · driest 0 mm in 1994	36
February	25.6°C26 Feb 2000	-25.6°C1 Feb 2026	47 mm16 Feb 2018	173 mm2018 · driest 17 mm in 2003	36
March	30.0°C30 Mar 1998	-23.3°C14 Mar 1993	43 mm26 Mar 2002	209 mm2020 · driest 35 mm in 1990	36
April	32.8°C27 Apr 1990	-13.3°C4 Apr 1995	46 mm30 Apr 2021	182 mm2011 · driest 26 mm in 2000	37
May	35.0°C15 May 1998	-5.0°C10 May 1997	66 mm25 May 1989	212 mm2004 · driest 49 mm in 2009	37
June	37.2°C25 Jun 1988	0.0°C2 Jun 2003	79 mm26 Jun 2013	245 mm1989 · driest 23 mm in 2005	35
July	39.4°C16 Jul 1988	3.3°C19 Jul 1997	78 mm3 Jul 2023	209 mm2023 · driest 29 mm in 1998	38
August	38.9°C1 Aug 2002	0.6°C6 Aug 1997	82 mm12 Aug 2014	228 mm2003 · driest 21 mm in 2024	36
September	35.6°C3 Sep 2002	-3.3°C24 Sep 1997	113 mm8 Sep 2004	200 mm2018 · driest 16 mm in 2023	36
October	32.8°C8 Oct 2007	-11.7°C22 Oct 1997	99 mm7 Oct 1998	151 mm2012 · driest 15 mm in 1991	35
November	26.7°C6 Nov 2024	-15.6°C4 Nov 1991	85 mm12 Nov 2022	165 mm2018 · driest 12 mm in 2000	37
December	22.2°C6 Dec 1998	-31.1°C21 Dec 1989	51 mm21 Dec 1998	219 mm1990 · driest 27 mm in 2010	35

Typical days per month at DENNISON WTR WKS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	25	2	3
February	<1	0	23	2	1
March	<1	<1	21	3	1
April	4	<1	9	3	<1
May	13	4	2	4	0
June	23	10	<1	4	0
July	29	16	0	3	0
August	28	14	0	3	0
September	17	5	<1	3	0
October	4	<1	7	3	0
November	<1	0	17	3	<1
December	0	0	25	3	1

How often, not how much — every day in DENNISON 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	<1%	32%	8%	38%	-1.0–6.7°C
February	<1%	27%	8%	29%	0.8–8.8°C
March	9%	33%	10%	41%	7.0–13.9°C
April	22%	40%	11%	54%	15.3–20.4°C
May	46%	39%	14%	49%	20.3–26.3°C
June	61%	36%	14%	43%	26.1–28.9°C
July	69%	30%	11%	31%	28.0–31.6°C
August	73%	27%	10%	26%	27.1–31.0°C
September	66%	26%	10%	28%	23.3–27.5°C
October	29%	29%	9%	28%	16.5–20.3°C
November	7%	31%	9%	37%	8.0–14.6°C
December	<1%	36%	9%	46%	2.4–8.5°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.

1989Each stripe is one year’s mean temperature against the 30-year average. Warmest: 1998. Coolest: 1994.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5151993
NOAA station: USC00332160 · DENNISON WTR WKS
Station distance: 1.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 40.39°, 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 DENNISON WTR WKS is what differs

Uhrichsville→Carrollton→Gnadenhutten→Rockford→Tuscarawas→Midvale→

Or put two places side by side: Dennison vs Uhrichsville

Best time to visitDennison.

September

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Dennison.

The whole year,
without the guesswork.

Nearby, measured,
and named.