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May Weather in Champaign, United States

Last updated: June 24, 2025

In May, the average temperature in Champaign, United States hovers around 18°C (65°F), but be prepared for a temperature range that can dip to a chilly 0°C (32°F) or soar to a sizzling 34°C (93°F). With an average precipitation of 142 mm (5.6 in) spread over 15 days, it's wise to carry an umbrella. The air is generally quite humid, with an average humidity level of 80%, making those warmer days feel even more intense.

May Temperature in Champaign

In May in Champaign, the average temperature is 18°C (65°F). Maximums can reach 34°C (93°F), and minimums can be as low as 0°C (32°F). It's wise to prepare for a range of temperatures when traveling to Champaign during this time.

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

The chart illustrates May temperature patterns in Champaign, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Champaign, May typically has an average temperature of 18°C (65°F), with highs reaching up to 34°C (93°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec293243526574777470574136
Data source: Temperature data for Champaign 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 Champaign

In Champaign in May, the total precipitation amount is 142 mm (5.6 in) spread over a period of 15 days.

May Precipitation Trends in Champaign

The chart displays monthly precipitation patterns in Champaign, 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 Champaign, May typically receives around 142 mm (5.6 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec787711412014210384102831167556
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Champaign

In Champaign in May, humidity is 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

May Average Humidity in Champaign

This chart illustrates the average monthly humidity levels in Champaign, 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 Champaign is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Champaign

In Champaign 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 Champaign.

Maximum UV Index Levels in Champaign for May

The chart shows the monthly maximum UV Index (UVI) for Champaign 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 Champaign typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Champaign 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 Champaign Compares to Other Months

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

This table compares monthly weather conditions in Champaign, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)78 mm (3.1 inches)84%moderate
February Weather0°C (32°F)77 mm (3.0 inches)82%moderate
March Weather6°C (43°F)114 mm (4.5 inches)84%high
April Weather11°C (53°F)120 mm (4.7 inches)83%very high
May Weather18°C (65°F)142 mm (5.6 inches)80%very high
June Weather24°C (75°F)103 mm (4.1 inches)83%extreme
July Weather25°C (78°F)84 mm (3.3 inches)82%very high
August Weather23°C (75°F)102 mm (4.0 inches)82%very high
September Weather21°C (70°F)83 mm (3.3 inches)79%very high
October Weather14°C (58°F)116 mm (4.5 inches)79%high
November Weather5°C (42°F)75 mm (2.9 inches)88%moderate
December Weather2°C (36°F)56 mm (2.2 inches)87%moderate

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