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May Weather in Oswego, United States

Last updated: June 24, 2025

In May, the average temperature in Oswego, United States hovers around 11°C (52°F), offering a refreshing climate. Expect a minimum of 0°C (33°F) and a peak of 26°C (80°F), perfect for a variety of outdoor activities. However, be prepared for some rain, as 117 mm (4.6 in) of precipitation usually falls over 13 days, with an average humidity of 82% adding a touch of moisture to the air.

May Temperature in Oswego

In May in Oswego, the average temperature is 11°C (52°F). Maximums can reach 26°C (80°F) and minimums can drop as low as 0°C (33°F). Pack layers to prepare for both warm days and chilly nights while exploring.

May Weather in Oswego: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Oswego, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oswego, May typically has an average temperature of 11°C (52°F), with highs reaching up to 26°C (80°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec282934435262727266554234
Data source: Temperature data for Oswego generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Oswego

In Oswego in May, the total precipitation amount is 117 mm (4.6 in) spread over 13 days.

May Precipitation Trends in Oswego

The chart displays monthly precipitation patterns in Oswego, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Oswego, May typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec108104921271179017711995187137140
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Oswego

In Oswego in May, humidity is 82%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that seeps into your bones, making it essential to dress in layers and stay prepared for the moisture-laden air as you explore your surroundings.

May Average Humidity in Oswego

This chart illustrates the average monthly humidity levels in Oswego, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Oswego is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Oswego

In Oswego in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Oswego.

Maximum UV Index Levels in Oswego for May

The chart shows the monthly maximum UV Index (UVI) for Oswego in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Oswego typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2468910997532
Data source: Oswego May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How May Weather in Oswego Compares to Other Months

Weather in Oswego varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Oswego, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Oswego, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)108 mm (4.3 inches)90%low
February Weather-2°C (29°F)104 mm (4.1 inches)90%moderate
March Weather1°C (34°F)92 mm (3.6 inches)87%high
April Weather6°C (43°F)127 mm (5.0 inches)88%very high
May Weather11°C (52°F)117 mm (4.6 inches)82%very high
June Weather17°C (62°F)90 mm (3.6 inches)79%very high
July Weather22°C (72°F)177 mm (7.0 inches)78%very high
August Weather22°C (72°F)119 mm (4.7 inches)76%very high
September Weather19°C (66°F)95 mm (3.8 inches)78%high
October Weather13°C (56°F)187 mm (7.4 inches)84%moderate
November Weather6°C (42°F)137 mm (5.4 inches)89%moderate
December Weather1°C (35°F)140 mm (5.5 inches)86%low

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