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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 20°C (68°F), offering a pleasant climate for exploration. Temperatures can dip as low as 4°C (40°F), while peaks can reach up to 33°C (92°F). With 239 mm (9.4 in) of precipitation spread over 14 days, visitors should be prepared for occasional showers. The air is quite humid, with an average humidity of 83%, adding a tropical touch to your adventures!

May Temperature in Oswego

In May, in Oswego, the average temperature is 20°C (68°F). Maximums can reach 33°C (92°F), and minimums can be as low as 4°C (40°F). It's advisable to pack layers to accommodate both warm days and cooler nights while enjoying your travels.

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 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec363851576878817974604842
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 precipitation amount is 239 mm (9.4 in), occurring over a span of 14 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 239 mm (9.4 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec67651281242399698117941275340
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 83%. With an average temperature of 20°C (68°F), this humidity feels like a warm, heavy blanket enveloping you, making it feel much warmer than it is. Traveling in such conditions can be quite taxing, as the air feels thick, often leading to a sense of exhaustion and requiring frequent breaks to seek shade or hydration.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%71%74%83%83%81%73%67%72%82%85%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101111109753
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 Weather2°C (36°F)67 mm (2.6 inches)77%moderate
February Weather3°C (38°F)65 mm (2.6 inches)76%moderate
March Weather10°C (51°F)128 mm (5.0 inches)71%high
April Weather14°C (58°F)124 mm (4.9 inches)73%very high
May Weather20°C (68°F)239 mm (9.4 inches)83%very high
June Weather26°C (78°F)96 mm (3.8 inches)83%extreme
July Weather27°C (81°F)98 mm (3.8 inches)81%extreme
August Weather26°C (79°F)117 mm (4.6 inches)73%very high
September Weather24°C (75°F)94 mm (3.7 inches)67%very high
October Weather16°C (60°F)127 mm (5.0 inches)72%high
November Weather9°C (48°F)53 mm (2.1 inches)82%moderate
December Weather6°C (42°F)40 mm (1.6 inches)85%moderate

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