nomadseason

January Weather in Waukesha, United States

Last updated: June 24, 2025

In Waukesha, United States, the average temperature in January hovers around -5°C (23°F). While chilly conditions prevail, expect a minimum plunge to -32°C (-25°F) and a maximum rise to 14°C (57°F). The month brings about 57 mm (2.2 in) of precipitation, spread over 7 days, contributing to an average humidity of 85%. Get ready for a frosty yet fascinating winter experience!

January Temperature in Waukesha

In January in Waukesha, the average temperature is -5°C (23°F), with maximums reaching 14°C (57°F) and minimums plummeting to -32°C (-25°F). Be prepared for a wide range of temperatures if you plan to travel during this time.

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

The chart illustrates January 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, January typically has an average temperature of -5°C (23°F), with highs reaching up to 14°C (57°F) and lows dropping to around -32°C (-25°F).
JanFebMarAprMayJunJulAugSepOctNovDec232536455869747265523730
Data source: Temperature data for Waukesha generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Waukesha

In Waukesha in January, the precipitation amount is 57 mm (2.2 in) over the course of 7 days.

January Precipitation Trends in Waukesha

The chart displays monthly precipitation patterns in Waukesha, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Waukesha, January typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec5753621091341059282991114748
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

January Humidity in Waukesha

In Waukesha in January, humidity is 85%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that clings to your skin, making even the briefest outdoor excursions feel daunting and uncomfortable.

January Average Humidity in Waukesha

This chart illustrates the average monthly humidity levels in Waukesha, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Waukesha is approximately 85%, 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 January generated using information from the Copernicus Climate Change Service.

January UV Index in Waukesha

In Waukesha in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Waukesha, you can check the information here.

Maximum UV Index Levels in Waukesha for January

The chart shows the monthly maximum UV Index (UVI) for Waukesha in January, 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 January, the maximum UV index in Waukesha typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34589101097532
Data source: Waukesha January 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 January 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 January’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 January’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

Compare Waukesha's Climate with Cities Worldwide