United States · 1991–2020

Best time to visit
Deep River.

September leads for comfortable weather in Deep River: typically 24.6°C by day, 11.2°C at night, with 85 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.6°C

Typical low11.2°C

Rain in September85 mm

Comfort

September

September · June · August

81climate match

Beach

July

July · August · June

74climate match

Outdoors

October

October · September · May

73climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only -1.2°C, 25° 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

5-1.2° / -11°

Feb

51.4° / -9.2°

Mar

108.6° / -3°

Apr

3915.9° / 3.1°

May

6321.7° / 9.8°

Jun

6926.9° / 15.3°

Jul

6629.2° / 17.4°

Aug

6828.2° / 16.1°

Sep

8124.6° / 11.2°

Oct

5217.5° / 4.6°

Nov

159° / -2°

Dec

51.9° / -7.6°

Monthly climate evidence for Deep River — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-1.2°C	-11°C	29 mm	4.6	9 h 28	5	Strong coverage
February	1.4°C	-9.2°C	38 mm	5.4	10 h 32	5	Strong coverage
March	8.6°C	-3°C	60 mm	6.5	11 h 48	10	Strong coverage
April	15.9°C	3.1°C	93 mm	8.5	13 h 16	39	Strong coverage
May	21.7°C	9.8°C	128 mm	10.8	14 h 30	63	Strong coverage
June	26.9°C	15.3°C	135 mm	10.1	15 h 10	69	Strong coverage
July	29.2°C	17.4°C	98 mm	6.9	14 h 54	66	Strong coverage
August	28.2°C	16.1°C	120 mm	8	13 h 51	68	Strong coverage
September	24.6°C	11.2°C	85 mm	6.6	12 h 25	81	Strong coverage
October	17.5°C	4.6°C	69 mm	6.7	11 h 01	52	Strong coverage
November	9°C	-2°C	57 mm	5.3	9 h 47	15	Strong coverage
December	1.9°C	-7.6°C	40 mm	5	9 h 11	5	Strong coverage

What has changed

Deep River runs -0.1°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

+0.2

Feb

-1.0

Mar

+0.6

Apr

-1.2

May

-0.7

Jun

-0.3

Jul

-1.0

Aug

-0.6

Sep

+1.4

Oct

-0.2

Nov

-0.1

Dec

+1.9

September daytime highs, 2011–2025. Last recorded: 27.8°C.

Records at SIGOURNEY, 1896–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.1°C31 Jan 1989	-35.6°C31 Jan 2019	43 mm20 Jan 1904	108 mm2024 · driest 0 mm in 2016	130
February	25.0°C23 Feb 2017	-34.4°C13 Feb 1905	42 mm14 Feb 1911	125 mm1911 · driest 0 mm in 1970	130
March	32.8°C22 Mar 2026	-28.9°C1 Mar 1962	57 mm19 Mar 1982	156 mm1982 · driest 1 mm in 1965	129
April	33.9°C30 Apr 1965	-13.9°C6 Apr 1982	125 mm18 Apr 2013	228 mm2013 · driest 3 mm in 2018	127
May	41.1°C31 May 1934	-4.4°C4 May 1907	92 mm10 May 1996	301 mm1996 · driest 12 mm in 1992	129
June	40.6°C26 Jun 1934	1.7°C12 Jun 1903	136 mm12 Jun 1946	295 mm2010 · driest 14 mm in 1988	128
July	45.0°C22 Jul 1901	7.2°C10 Jul 1945	98 mm26 Jul 1992	350 mm1992 · driest 5 mm in 1975	129
August	43.9°C8 Aug 1934	3.9°C30 Aug 1915	121 mm30 Aug 1965	303 mm2009 · driest 6 mm in 2020	129
September	39.4°C6 Sep 1899	-8.9°C22 Sep 1913	89 mm10 Sep 1992	306 mm1965 · driest 0 mm in 2017	130
October	35.0°C4 Oct 1938	-15.6°C30 Oct 1925	69 mm6 Oct 2018	213 mm1941 · driest 0 mm in 1964	128
November	27.2°C2 Nov 1938	-22.8°C26 Nov 1898	66 mm16 Nov 1961	198 mm1961 · driest 0 mm in 1904	127
December	23.3°C16 Dec 2021	-34.4°C28 Dec 1924	59 mm14 Dec 2015	114 mm2015 · driest 1 mm in 1958	126

Typical days per month at SIGOURNEY, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	4
February	0	0	26	1	4
March	<1	0	22	2	2
April	3	<1	8	3	<1
May	10	1	<1	4	0
June	22	7	0	4	0
July	27	13	0	3	0
August	26	10	0	3	0
September	15	5	<1	3	0
October	4	<1	6	2	<1
November	<1	0	19	2	<1
December	0	0	28	1	3

How often, not how much — every day in SIGOURNEY’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%	14%	3%	8%	-5.0–3.2°C
February	<1%	16%	3%	12%	-2.8–5.8°C
March	8%	22%	6%	22%	4.5–12.9°C
April	25%	28%	9%	35%	13.8–19.6°C
May	51%	32%	12%	40%	19.9–25.9°C
June	67%	31%	12%	36%	25.3–30.2°C
July	76%	24%	10%	24%	28.0–32.9°C
August	76%	24%	10%	23%	26.9–31.8°C
September	67%	24%	10%	25%	22.7–27.6°C
October	38%	20%	7%	20%	15.7–22.0°C
November	7%	18%	6%	14%	6.1–12.9°C
December	<1%	16%	4%	12%	-1.9–5.4°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.

1897Each stripe is one year’s mean temperature against the 118-year average. Warmest: 1931. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4853642
NOAA station: USC00137678 · SIGOURNEY
Station distance: 29.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 41.58°, 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 SIGOURNEY is what differs

Sigourney→What Cheer→Delta→Keswick→Ollie→South English→

Or put two places side by side: Deep River vs Sigourney

Best time to visitDeep River.