United States · 1991–2020

Best time to visit
Westport.

September leads for comfortable weather in Westport: typically 26.4°C by day, 13.4°C at night, with 84 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.4°C

Typical low13.4°C

Rain in September84 mm

Comfort

September

September · May · June

80climate match

Beach

August

August · July · June

73climate match

Outdoors

October

October · April · September

81climate match

The weakest month is January, scoring 5 against September’s 80 — days reach only 4.6°C, 19° 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

54.6° / -4.8°

Feb

57.3° / -3.2°

Mar

2513.2° / 1.3°

Apr

5119.7° / 6.4°

May

7524.3° / 11.8°

Jun

6628.3° / 16.4°

Jul

6029.9° / 18.4°

Aug

6629.4° / 17.4°

Sep

8026.4° / 13.4°

Oct

6320.3° / 7.4°

Nov

2612.8° / 1.9°

Dec

56.7° / -2.4°

Monthly climate evidence for Westport — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.6°C	-4.8°C	78 mm	7.8	9 h 41	5	Strong coverage
February	7.3°C	-3.2°C	81 mm	8	10 h 40	5	Strong coverage
March	13.2°C	1.3°C	101 mm	8.6	11 h 50	25	Strong coverage
April	19.7°C	6.4°C	131 mm	9.6	13 h 10	51	Strong coverage
May	24.3°C	11.8°C	123 mm	10	14 h 18	75	Strong coverage
June	28.3°C	16.4°C	123 mm	8.6	14 h 54	66	Strong coverage
July	29.9°C	18.4°C	109 mm	7.5	14 h 40	60	Strong coverage
August	29.4°C	17.4°C	102 mm	6.3	13 h 42	66	Strong coverage
September	26.4°C	13.4°C	84 mm	5.9	12 h 24	80	Strong coverage
October	20.3°C	7.4°C	87 mm	6.7	11 h 06	63	Strong coverage
November	12.8°C	1.9°C	94 mm	8	9 h 58	26	Strong coverage
December	6.7°C	-2.4°C	92 mm	8.6	9 h 25	5	Strong coverage

What has changed

Westport runs +0.5°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

+1.6

Mar

+1.4

Apr

+0.7

May

+0.3

Jun

-0.3

Jul

-0.5

Aug

-0.3

Sep

+0.1

Oct

+0.5

Nov

+0.1

Dec

+1.7

September daytime highs, 2011–2024. Last recorded: 27.4°C.

Records at N VERNON 2 ESE, 1938–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.0°C24 Jan 1943	-31.1°C17 Jan 1977	122 mm21 Jan 1959	386 mm1949 · driest 0 mm in 1984	86
February	26.1°C20 Feb 2018	-27.8°C20 Feb 2015	94 mm21 Feb 1997	230 mm1950 · driest 7 mm in 1978	84
March	30.0°C23 Mar 2026	-21.1°C8 Mar 1943	125 mm6 Mar 1945	357 mm1945 · driest 0 mm in 1999	87
April	31.7°C30 Apr 1962	-7.2°C9 Apr 1997	102 mm29 Apr 1996	327 mm2011 · driest 17 mm in 1938	87
May	35.0°C17 May 1962	-5.6°C6 May 1989	109 mm24 May 1968	316 mm1968 · driest 0 mm in 2023	87
June	40.6°C28 Jun 2012	2.2°C1 Jun 1966	165 mm23 Jun 1960	284 mm1960 · driest 11 mm in 1991	88
July	40.6°C14 Jul 1954	6.1°C1 Jul 1943	109 mm5 Jul 1957	267 mm1992 · driest 16 mm in 2011	87
August	39.4°C21 Aug 1983	4.4°C29 Aug 1986	122 mm20 Aug 1979	256 mm1979 · driest 7 mm in 1998	86
September	40.0°C8 Sep 1939	-3.3°C28 Sep 1942	107 mm15 Sep 1956	176 mm2018 · driest 3 mm in 2019	83
October	35.0°C21 Oct 1939	-7.8°C26 Oct 1962	102 mm20 Oct 1983	252 mm1983 · driest 3 mm in 1963	83
November	27.8°C2 Nov 1961	-18.9°C30 Nov 1958	72 mm6 Nov 2017	224 mm1948 · driest 11 mm in 1963	84
December	23.3°C3 Dec 1982	-30.0°C22 Dec 1989	86 mm15 Dec 1948	189 mm1990 · driest 0 mm in 1950	83

Typical days per month at N VERNON 2 ESE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	22	3	3
February	<1	0	20	2	4
March	1	0	14	4	1
April	6	<1	4	4	<1
May	15	3	<1	4	0
June	25	11	0	4	0
July	28	16	0	3	0
August	28	13	0	3	0
September	19	6	0	3	0
October	7	<1	3	3	0
November	<1	0	12	3	<1
December	0	0	20	3	2

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 84); on 2011–2025 it is May (84). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in N VERNON 2 ESE’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%	25%	9%	27%	1.2–7.8°C
February	2%	28%	10%	34%	2.8–10.3°C
March	14%	29%	13%	35%	9.6–16.5°C
April	35%	32%	13%	41%	17.1–22.0°C
May	57%	32%	14%	42%	21.9–27.2°C
June	71%	28%	13%	33%	27.2–30.2°C
July	74%	26%	12%	27%	28.6–32.5°C
August	78%	22%	9%	20%	28.0–31.8°C
September	76%	20%	8%	17%	24.6–29.3°C
October	48%	21%	8%	21%	18.4–23.0°C
November	11%	26%	12%	30%	9.3–15.5°C
December	<1%	26%	10%	30%	3.3–9.7°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.

1938Each stripe is one year’s mean temperature against the 69-year average. Warmest: 2012. Coolest: 1958.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4266871
NOAA station: USC00126435 · N VERNON 2 ESE
Station distance: 19.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 39.18°, 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 N VERNON 2 ESE is what differs

North Vernon→Country Squire Lakes→Hayden→Holton→Dupont→Vernon→

Or put two places side by side: Westport vs North Vernon

Best time to visitWestport.