United States · 1991–2020

Best time to visit
Clarington.

September leads for comfortable weather in Clarington: typically 25.3°C by day, 12.9°C at night, with 94 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.3°C

Typical low12.9°C

Rain in September94 mm

Comfort

September

September · June · August

80climate match

Beach

August

August · July · June

72climate match

Outdoors

October

October · May · April

78climate match

The weakest month is January, scoring 5 against September’s 80 — days reach only 3.8°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

53.8° / -6°

Feb

55.7° / -5°

Mar

1210.8° / -1.4°

Apr

4518° / 3.7°

May

6822.9° / 9.5°

Jun

7227° / 14.5°

Jul

6328.8° / 17.1°

Aug

7128.5° / 16.6°

Sep

8025.3° / 12.9°

Oct

5818.9° / 6.4°

Nov

2411.9° / 0.5°

Dec

56.1° / -3°

Monthly climate evidence for Clarington — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.8°C	-6°C	93 mm	10.8	9 h 38	5	Strong coverage
February	5.7°C	-5°C	76 mm	9	10 h 38	5	Strong coverage
March	10.8°C	-1.4°C	101 mm	9.8	11 h 49	12	Strong coverage
April	18°C	3.7°C	98 mm	10.3	13 h 12	45	Strong coverage
May	22.9°C	9.5°C	111 mm	11.2	14 h 21	68	Strong coverage
June	27°C	14.5°C	114 mm	9.9	14 h 58	72	Strong coverage
July	28.8°C	17.1°C	117 mm	9.4	14 h 43	63	Strong coverage
August	28.5°C	16.6°C	90 mm	7.5	13 h 44	71	Strong coverage
September	25.3°C	12.9°C	94 mm	7	12 h 24	80	Strong coverage
October	18.9°C	6.4°C	75 mm	8.1	11 h 05	58	Strong coverage
November	11.9°C	0.5°C	71 mm	8.3	9 h 56	24	Strong coverage
December	6.1°C	-3°C	90 mm	10.2	9 h 22	5	Strong coverage

What has changed

Clarington 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

+1.2

Feb

+1.3

Mar

—

Apr

+0.6

May

+0.2

Jun

0.0

Jul

+0.3

Aug

+0.2

Sep

+0.9

Oct

+1.2

Nov

-0.6

Dec

+1.8

September daytime highs, 2011–2025. Last recorded: 26.0°C.

Records at HANNIBAL LOCKS & DAM, 1975–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.8°C12 Jan 2020	-31.1°C19 Jan 1994	72 mm12 Jan 2005	217 mm2005 · driest 18 mm in 1981	51
February	24.4°C25 Feb 2017	-23.9°C2 Feb 1976	62 mm14 Feb 2000	196 mm2018 · driest 10 mm in 1978	51
March	29.4°C24 Mar 2026	-22.2°C2 Mar 1980	88 mm2 Mar 1997	211 mm1997 · driest 22 mm in 2003	51
April	32.2°C19 Apr 1976	-7.8°C7 Apr 1982	64 mm4 Apr 2018	207 mm2011 · driest 33 mm in 2010	52
May	33.3°C29 May 2012	-3.3°C2 May 1978	69 mm3 May 2010	190 mm2003 · driest 7 mm in 1991	52
June	36.1°C30 Jun 2012	3.3°C9 Jun 1977	92 mm23 Jun 2018	256 mm1998 · driest 25 mm in 1992	52
July	38.3°C8 Jul 2012	5.6°C6 Jul 1979	85 mm14 Jul 2010	246 mm1996 · driest 37 mm in 2020	51
August	37.8°C15 Aug 1988	5.6°C23 Aug 1982	82 mm6 Aug 2007	199 mm2003 · driest 28 mm in 1996	50
September	35.0°C4 Sep 2011	1.1°C22 Sep 1991	109 mm9 Sep 2004	274 mm2018 · driest 10 mm in 1985	51
October	32.8°C2 Oct 2019	-5.6°C21 Oct 1981	59 mm21 Oct 2016	153 mm2019 · driest 10 mm in 1991	51
November	26.7°C3 Nov 2004	-14.4°C30 Nov 1976	88 mm5 Nov 1985	278 mm1985 · driest 12 mm in 2012	51
December	23.3°C4 Dec 1982	-25.6°C23 Dec 1989	86 mm3 Dec 1991	175 mm2008 · driest 32 mm in 1989	51

Typical days per month at HANNIBAL LOCKS & DAM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	3	2
February	0	0	24	3	2
March	<1	0	20	4	<1
April	5	<1	8	3	0
May	12	2	<1	4	0
June	22	8	0	4	0
July	28	13	0	4	0
August	28	11	0	3	0
September	18	5	0	3	0
October	5	<1	3	3	0
November	<1	0	16	3	<1
December	0	0	23	3	1

How often, not how much — every day in HANNIBAL LOCKS & DAM’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%	35%	8%	47%	-0.4–6.5°C
February	2%	31%	9%	40%	2.1–9.1°C
March	10%	32%	11%	40%	7.6–14.3°C
April	27%	35%	11%	44%	15.1–20.1°C
May	49%	36%	14%	50%	20.4–25.5°C
June	66%	32%	13%	40%	25.4–28.4°C
July	69%	31%	13%	35%	27.5–30.8°C
August	74%	26%	10%	26%	26.7–30.6°C
September	70%	23%	9%	23%	23.5–27.2°C
October	36%	27%	8%	30%	17.0–20.7°C
November	9%	29%	9%	35%	9.4–14.8°C
December	<1%	33%	9%	41%	2.7–9.3°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.

1976Each stripe is one year’s mean temperature against the 48-year average. Warmest: 2024. Coolest: 1979.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4508796
NOAA station: USC00333500 · HANNIBAL LOCKS & DAM
Station distance: 11 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 39.77°, 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 HANNIBAL LOCKS & DAM is what differs

New Martinsville→Paden City→Woodsfield→Sardis→Hannibal→Antioch→

Or put two places side by side: Clarington vs New Martinsville

Best time to visitClarington.