United States · 1991–2020

Best time to visit
Trumbull.

September leads for comfortable weather in Trumbull: typically 25.8°C by day, 11.6°C at night, with 57 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.8°C

Typical low11.6°C

Rain in September57 mm

Comfort

September

September · June · May

83climate match

Beach

August

August · July · June

74climate match

Outdoors

October

October · September · May

80climate match

The weakest month is January, scoring 5 against September’s 83 — days reach only 2°C, 22° below the 24°C the score treats as ideal, and nights drop to -9.5°C.

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° / -9.5°

Feb

54.4° / -7.7°

Mar

2411.3° / -2.5°

Apr

4517° / 3°

May

6922.6° / 9.6°

Jun

7128.4° / 15.6°

Jul

6130.5° / 18°

Aug

6929.2° / 16.7°

Sep

8325.8° / 11.6°

Oct

5818.3° / 4.3°

Nov

2210.2° / -2.7°

Dec

53.5° / -7.8°

Monthly climate evidence for Trumbull — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2°C	-9.5°C	16 mm	3.2	9 h 33	5	Strong coverage
February	4.4°C	-7.7°C	21 mm	3.4	10 h 35	5	Strong coverage
March	11.3°C	-2.5°C	35 mm	5.3	11 h 49	24	Strong coverage
April	17°C	3°C	78 mm	7.3	13 h 14	45	Strong coverage
May	22.6°C	9.6°C	116 mm	9.3	14 h 25	69	Strong coverage
June	28.4°C	15.6°C	98 mm	8.6	15 h 04	71	Strong coverage
July	30.5°C	18°C	96 mm	7.5	14 h 49	61	Strong coverage
August	29.2°C	16.7°C	86 mm	7.3	13 h 47	69	Strong coverage
September	25.8°C	11.6°C	57 mm	5.4	12 h 25	83	Strong coverage
October	18.3°C	4.3°C	51 mm	5.2	11 h 03	58	Strong coverage
November	10.2°C	-2.7°C	32 mm	3.6	9 h 51	22	Strong coverage
December	3.5°C	-7.8°C	23 mm	3.5	9 h 16	5	Strong coverage

What has changed

Trumbull 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

+0.9

Feb

-0.7

Mar

+2.3

Apr

-0.6

May

-0.9

Jun

+0.1

Jul

-1.6

Aug

-1.3

Sep

+1.1

Oct

-0.2

Nov

+1.5

Dec

+2.1

September daytime highs, 2011–2025. Last recorded: 26.1°C.

Records at HASTINGS 4N, 1907–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	24.4°C11 Jan 1990	-34.4°C12 Jan 1912	43 mm23 Jan 1965	82 mm1960 · driest 0 mm in 1943	117
February	26.7°C25 Feb 1995	-33.9°C16 Feb 2021	39 mm19 Feb 1971	71 mm1971 · driest 0 mm in 1921	115
March	35.6°C21 Mar 2026	-26.1°C11 Mar 1998	72 mm13 Mar 2021	216 mm2021 · driest 0 mm in 1936	115
April	35.6°C23 Apr 1989	-15.0°C3 Apr 1936	74 mm24 Apr 2007	177 mm1984 · driest 1 mm in 1989	116
May	40.6°C29 May 1934	-5.6°C1 May 1909	99 mm23 May 1965	317 mm1965 · driest 12 mm in 1934	118
June	43.3°C26 Jun 1936	1.1°C4 Jun 1951	130 mm4 Jun 2015	297 mm1915 · driest 10 mm in 1911	120
July	46.7°C24 Jul 1936	7.2°C4 Jul 1915	101 mm6 Jul 1969	291 mm1993 · driest 4 mm in 1983	120
August	43.9°C23 Aug 1943	4.4°C30 Aug 1911	155 mm31 Aug 1969	250 mm1990 · driest 9 mm in 1919	119
September	40.6°C4 Sep 1945	-3.3°C22 Sep 1995	107 mm3 Sep 1973	321 mm1973 · driest 5 mm in 1943	118
October	36.1°C5 Oct 1947	-15.6°C27 Oct 1997	87 mm3 Oct 2013	161 mm2008 · driest 0 mm in 1933	119
November	30.0°C5 Nov 1945	-21.7°C14 Nov 1940	82 mm16 Nov 1996	101 mm1996 · driest 0 mm in 1924	118
December	26.7°C23 Dec 1964	-30.6°C23 Dec 1989	40 mm26 Dec 2018	125 mm1913 · driest 0 mm in 1922	118

Typical days per month at HASTINGS 4N, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	5
February	<1	0	26	<1	5
March	1	<1	22	1	3
April	4	<1	9	2	1
May	12	4	<1	4	<1
June	24	12	0	3	0
July	29	18	0	4	0
August	27	14	0	3	0
September	18	8	<1	2	0
October	5	1	6	2	<1
November	<1	0	22	<1	2
December	0	0	30	<1	4

How often, not how much — every day in HASTINGS 4N’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%	9%	1%	4%	-2.3–6.5°C
February	3%	12%	2%	8%	-0.2–9.3°C
March	15%	16%	4%	13%	5.9–15.0°C
April	34%	23%	8%	25%	14.2–20.3°C
May	56%	28%	11%	33%	20.2–25.9°C
June	71%	28%	11%	30%	26.2–31.8°C
July	78%	22%	9%	22%	29.5–34.7°C
August	78%	22%	9%	19%	28.2–33.8°C
September	74%	18%	7%	15%	23.5–29.4°C
October	48%	14%	5%	10%	16.5–22.6°C
November	10%	10%	3%	6%	7.8–13.5°C
December	<1%	10%	2%	5%	-0.5–7.3°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.

1908Each stripe is one year’s mean temperature against the 106-year average. Warmest: 1934. Coolest: 1996.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5080504
NOAA station: USC00253660 · HASTINGS 4N
Station distance: 10 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 40.68°, 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 HASTINGS 4N is what differs

Wood River→Doniphan→Inland→Blaine→Do-Mar Mobile Home Park→Halloran→

Or put two places side by side: Trumbull vs Wood River

Best time to visitTrumbull.