United States · 1991–2020

Best time to visit
Oswego.

June leads for comfortable weather in Oswego: typically 23.9°C by day, 14°C at night, with 86 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high23.9°C

Typical low14°C

Rain in June86 mm

Comfort

June

June · August · July

85climate match

Beach

July

July · August · June

68climate match

Outdoors

May

May · September · June

78climate match

The weakest month is January, scoring 5 against June’s 85 — days reach only -0.2°C, 24° 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

5-0.2° / -7.4°

Feb

50.9° / -6.7°

Mar

55.1° / -2.6°

Apr

2412° / 2.9°

May

5918.9° / 8.8°

Jun

8523.9° / 14°

Jul

7526.6° / 17.3°

Aug

7826° / 16.7°

Sep

7522.1° / 12.8°

Oct

3715.2° / 7.2°

Nov

78.7° / 1.9°

Dec

52.8° / -3.4°

Monthly climate evidence for Oswego — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 13 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-0.2°C	-7.4°C	95 mm	14.9	4.2°C	9 h 17	5	Strong coverage
February	0.9°C	-6.7°C	72 mm	12	3.0°C	10 h 26	5	Strong coverage
March	5.1°C	-2.6°C	77 mm	11.1	2.6°C	11 h 47	5	Strong coverage
April	12°C	2.9°C	88 mm	11.2	3.4°C	13 h 21	24	Strong coverage
May	18.9°C	8.8°C	84 mm	10	6.2°C	14 h 40	59	Strong coverage
June	23.9°C	14°C	86 mm	9.5	13.9°C	15 h 24	85	Strong coverage
July	26.6°C	17.3°C	85 mm	8.8	20.6°C	15 h 06	75	Strong coverage
August	26°C	16.7°C	88 mm	8.9	22.4°C	13 h 58	78	Strong coverage
September	22.1°C	12.8°C	100 mm	9.2	19.9°C	12 h 27	75	Strong coverage
October	15.2°C	7.2°C	117 mm	12.3	14.7°C	10 h 56	37	Strong coverage
November	8.7°C	1.9°C	105 mm	13.1	10.1°C	9 h 37	7	Strong coverage
December	2.8°C	-3.4°C	98 mm	14.5	6.7°C	8 h 58	5	Strong coverage

What has changed

Oswego runs +1.2°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

+1.3

Feb

+2.1

Mar

+1.5

Apr

+1.3

May

+1.3

Jun

+0.5

Jul

+0.5

Aug

+0.5

Sep

+1.2

Oct

+1.2

Nov

+0.9

Dec

+2.5

June daytime highs, 2011–2025. Last recorded: 24.9°C.

Records at OSWEGO, 1926–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.6°C25 Jan 1950	-29.4°C15 Jan 1957	63 mm8 Jan 1998	214 mm1978 · driest 23 mm in 1933	101
February	21.1°C27 Feb 2024	-29.4°C9 Feb 1934	55 mm26 Feb 1961	158 mm2008 · driest 17 mm in 1987	101
March	28.3°C28 Mar 1945	-22.8°C4 Mar 1950	68 mm4 Mar 1971	146 mm1955 · driest 19 mm in 1957	101
April	32.2°C28 Apr 1990	-10.6°C7 Apr 1982	51 mm4 Apr 2003	169 mm2011 · driest 17 mm in 1941	101
May	32.8°C30 May 1987	-2.2°C4 May 1978	53 mm13 May 2000	190 mm1931 · driest 23 mm in 1977	101
June	35.6°C28 Jun 1944	2.2°C3 Jun 1986	76 mm20 Jun 2019	197 mm2010 · driest 3 mm in 1955	101
July	35.0°C21 Jul 2011	6.7°C8 Jul 1969	97 mm3 Jul 1974	238 mm1992 · driest 13 mm in 2016	101
August	36.1°C14 Aug 2002	5.6°C27 Aug 1969	87 mm31 Aug 2005	200 mm1992 · driest 19 mm in 1940	100
September	35.6°C5 Sep 1953	-1.1°C24 Sep 1963	89 mm30 Sep 2010	219 mm2010 · driest 22 mm in 1948	100
October	30.0°C1 Oct 2019	-6.1°C20 Oct 1972	84 mm21 Oct 1995	257 mm1955 · driest 4 mm in 1963	100
November	26.1°C5 Nov 2024	-15.6°C23 Nov 2018	83 mm30 Nov 1963	229 mm1963 · driest 28 mm in 1939	100
December	20.6°C7 Dec 1998	-30.6°C29 Dec 1933	64 mm1 Dec 2010	175 mm1958 · driest 29 mm in 1926	100

Typical days per month at OSWEGO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	18
February	0	0	24	2	14
March	<1	0	22	2	8
April	1	<1	8	3	2
May	6	<1	<1	3	0
June	13	3	0	3	0
July	22	6	0	3	0
August	20	4	0	3	0
September	8	1	<1	4	0
October	1	0	1	4	<1
November	0	0	11	3	6
December	0	0	23	3	13

The best month has moved. On the 1961–1990 numbers the strongest month here was August (scoring 87); on 2011–2025 it is June (90). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in OSWEGO’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%	47%	7%	70%	-3.7–3.1°C
February	0%	42%	7%	59%	-2.3–3.6°C
March	2%	37%	7%	53%	1.7–8.7°C
April	9%	36%	9%	49%	8.6–14.1°C
May	27%	33%	8%	41%	15.6–20.8°C
June	55%	29%	9%	34%	21.5–25.3°C
July	72%	26%	8%	27%	24.3–27.9°C
August	71%	27%	9%	29%	23.9–27.1°C
September	48%	29%	10%	38%	19.4–23.3°C
October	16%	34%	10%	48%	13.1–17.4°C
November	2%	43%	11%	63%	6.3–11.3°C
December	<1%	46%	9%	70%	-1.1–5.2°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.

1926Each stripe is one year’s mean temperature against the 97-year average. Warmest: 2024. Coolest: 1926.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5130081
NOAA station: USC00306314 · OSWEGO
Station distance: 2.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 43.46°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 13 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
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 OSWEGO is what differs

Minetto→Fair Haven→Hannibal→Red Creek→Clark Corners→Crocketts→

Or put two places side by side: Oswego vs Minetto

Best time to visitOswego.

June

July

May

The whole year,without the guesswork.

Oswego runs +1.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Oswego.

The whole year,
without the guesswork.

Oswego runs +1.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.