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Monthly climate in Oswego, New York, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Oswego features a humid continental climate (Dfb).Temperatures typically range between -2 °C (29 °F) and 22 °C (72 °F) through the year, but rarely can drop to -18 °C (0 °F) or can rise to as high as 30 °C (87 °F).The average annual precipitation amounts to about 1493 mm (58.8 inches) and receives 176 rainy days on the 1 mm (0.04 inches) threshold annually.Oswego enjoys an average of 2811 hours of sunshine throughout the year, and daylight varies from 9 hours 0 minutes to 15 hours 20 minutes per day.

Monthly average temperatures in Oswego, New York, United States §

The warmest months in Oswego are July, August and September, with daily mean temperatures ranging from 19 to 22 °C (66 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -2 to 1 °C (29 - 34 °F) throughout the day. On average each year, Oswego experiences 26 days above 25 °C (77.0 °F) and 85 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Oswego, New York, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 13°C
(56°F)		 13°C
(56°F)		 17°C
(63°F)		 22°C
(72°F)		 26°C
(80°F)		 28°C
(82°F)		 30°C
(87°F)		 30°C
(86°F)		 30°C
(86°F)		 24°C
(75°F)		 20°C
(69°F)		 15°C
(59°F)
Mean maximum 9°C
(49°F)		 10°C
(50°F)		 13°C
(56°F)		 18°C
(66°F)		 24°C
(75°F)		 25°C
(78°F)		 28°C
(83°F)		 28°C
(84°F)		 27°C
(80°F)		 23°C
(74°F)		 17°C
(63°F)		 11°C
(53°F)
Average high 1°C
(33°F)		 1°C
(34°F)		 4°C
(40°F)		 9°C
(48°F)		 14°C
(58°F)		 20°C
(68°F)		 24°C
(76°F)		 25°C
(77°F)		 21°C
(71°F)		 16°C
(61°F)		 8°C
(47°F)		 4°C
(39°F)
Daily mean -2°C
(29°F)		 -2°C
(29°F)		 1°C
(34°F)		 6°C
(43°F)		 11°C
(52°F)		 17°C
(62°F)		 22°C
(72°F)		 22°C
(72°F)		 19°C
(66°F)		 13°C
(56°F)		 6°C
(42°F)		 1°C
(35°F)
Average low -5°C
(24°F)		 -4°C
(24°F)		 -2°C
(29°F)		 3°C
(38°F)		 8°C
(47°F)		 14°C
(57°F)		 20°C
(67°F)		 20°C
(68°F)		 16°C
(61°F)		 11°C
(51°F)		 3°C
(38°F)		 -1°C
(31°F)
Mean minimum -14°C
(8°F)		 -13°C
(9°F)		 -10°C
(13°F)		 -1°C
(30°F)		 3°C
(38°F)		 9°C
(49°F)		 16°C
(61°F)		 15°C
(60°F)		 11°C
(52°F)		 5°C
(41°F)		 -5°C
(24°F)		 -9°C
(16°F)
Minimum -18°C
(0°F)		 -15°C
(5°F)		 -12°C
(11°F)		 -3°C
(26°F)		 0°C
(33°F)		 6°C
(44°F)		 13°C
(56°F)		 14°C
(58°F)		 7°C
(46°F)		 3°C
(37°F)		 -9°C
(16°F)		 -14°C
(7°F)

Compare climate in Oswego with other places

Compare temperature, precipitation, sunshine, UV index in Oswego, New York, United States with other places around the world.

Monthly average precipitation in Oswego, New York, United States §

Oswego usually has the most precipitation in July, October and December, with an average of 16 rainy days and 168 mm (6.6 inches) of precipitation per month.The driest months in Oswego are March, June and September. On average, 93 mm (3.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Oswego, New York, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 108 (4.3) 104 (4.1) 92 (3.6) 127 (5.0) 117 (4.6) 90 (3.6) 177 (7.0) 119 (4.7) 95 (3.8) 187 (7.4) 137 (5.4) 140 (5.5)
Average precipitation days (≥ 1 mm) 16 17 12 15 13 12 15 13 10 15 18 20

Monthly sunshine hours in Oswego, New York, United States §

The sunniest months in Oswego are June, July and August, when the sun shines an average of 11 hours 4 minutes a day.Least sunny months in Oswego: January, February and December receive an average of 4 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Oswego, New York, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 107 148 227 235 284 335 345 338 292 211 156 127
Mean daily daylight hours 9h 21m 10h 30m 11h 57m 13h 26m 14h 42m 15h 20m 14h 59m 13h 52m 12h 26m 10h 57m 9h 40m 9h 0m

Solar UV radiation in Oswego, New York, United States §

Oswego experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Oswego UV Index data.

Average daily maximum UV levels by month for Oswego, New York, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 4 6 8 9 10 9 9 7 5 3 2