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May Weather in Waukesha, United States

Last updated: June 24, 2025

In May, the average temperature in Waukesha, United States hovers around 14°C (58°F). Expect minimum chills of -1°C (31°F) and maximum warmth peaking at 34°C (93°F). With an average precipitation of 134 mm (5.3 in) spread over 14 days, the air tends to be quite humid, with an average humidity of 78%.

May Temperature in Waukesha

In May in Waukesha, the average temperature is 14°C (58°F). The maximum can reach 34°C (93°F), and the minimum can be as low as -1°C (31°F). Therefore, travelers should be prepared for a wide range of temperatures and pack accordingly to ensure comfort during their visit.

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

The chart illustrates May temperature patterns in Waukesha, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waukesha, May typically has an average temperature of 14°C (58°F), with highs reaching up to 34°C (93°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec232536455869747265523730
Data source: Temperature data for Waukesha 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 Waukesha

In Waukesha in May, the total precipitation amount is 134 mm (5.3 in) over the course of 14 days.

May Precipitation Trends in Waukesha

The chart displays monthly precipitation patterns in Waukesha, 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 Waukesha, May typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec5753621091341059282991114748
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Waukesha

In Waukesha in May, humidity is 78%. With an average temperature of 14°C (58°F), this humidity feels like a damp embrace, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat more than usual while exploring.

May Average Humidity in Waukesha

This chart illustrates the average monthly humidity levels in Waukesha, 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 Waukesha is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Waukesha

In Waukesha 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 Waukesha.

Maximum UV Index Levels in Waukesha for May

The chart shows the monthly maximum UV Index (UVI) for Waukesha 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 Waukesha typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34589101097532
Data source: Waukesha 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 Waukesha Compares to Other Months

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

This table compares monthly weather conditions in Waukesha, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)57 mm (2.2 inches)85%moderate
February Weather-4°C (25°F)53 mm (2.1 inches)85%moderate
March Weather2°C (36°F)62 mm (2.5 inches)85%moderate
April Weather7°C (46°F)109 mm (4.3 inches)85%very high
May Weather14°C (58°F)134 mm (5.3 inches)78%very high
June Weather21°C (69°F)105 mm (4.1 inches)80%very high
July Weather23°C (75°F)92 mm (3.6 inches)78%very high
August Weather22°C (72°F)82 mm (3.2 inches)76%very high
September Weather19°C (66°F)99 mm (3.9 inches)79%high
October Weather11°C (52°F)111 mm (4.4 inches)83%moderate
November Weather3°C (38°F)47 mm (1.8 inches)88%moderate
December Weather-1°C (31°F)48 mm (1.9 inches)81%low

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