nomadseason

March Weather in Janesville, United States

Last updated: June 24, 2025

In March, the average temperature in Janesville, United States is a brisk 3°C (37°F). Be prepared for a temperature swing, with lows plummeting to -23°C (-9°F) and highs reaching up to 23°C (73°F). This month experiences about 59 mm (2.3 in) of precipitation over 9 days, making it essential to brace for wet weather. With an average humidity of 85%, the atmosphere will feel quite moist. Stay warm and dry!

March Temperature in Janesville

In March in Janesville, the average temperature is 3°C (37°F). The maximum can reach 23°C (73°F), while the minimum can drop as low as -23°C (-9°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

March Weather in Janesville: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Janesville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Janesville, March typically has an average temperature of 3°C (37°F), with highs reaching up to 23°C (73°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec222337466071757266523730
Data source: Temperature data for Janesville 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.

March Precipitation in Janesville

In Janesville in March, the precipitation amount is 59 mm (2.3 in) over the course of 9 days.

March Precipitation Trends in Janesville

The chart displays monthly precipitation patterns in Janesville, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Janesville, March typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec58545910213411077941101114550
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

March Humidity in Janesville

In Janesville in March, humidity is 85%. With an average temperature of 3°C (37°F), this humidity feels like a chilling blanket enveloping you, making traveling uncomfortable as your clothes cling to your skin and the cold air bites at your face.

March Average Humidity in Janesville

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

March UV Index in Janesville

In Janesville in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Janesville, you can refer to this Hourly UV Index in Janesville.

Maximum UV Index Levels in Janesville for March

The chart shows the monthly maximum UV Index (UVI) for Janesville in March, 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 March, the maximum UV index in Janesville typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098532
Data source: Janesville March 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 March Weather in Janesville Compares to Other Months

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

This table compares monthly weather conditions in Janesville, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)58 mm (2.3 inches)85%moderate
February Weather-5°C (24°F)54 mm (2.1 inches)85%moderate
March Weather3°C (37°F)59 mm (2.3 inches)85%high
April Weather8°C (47°F)102 mm (4.0 inches)85%very high
May Weather15°C (60°F)133 mm (5.3 inches)78%very high
June Weather22°C (71°F)110 mm (4.3 inches)80%very high
July Weather24°C (75°F)77 mm (3.0 inches)78%very high
August Weather22°C (72°F)94 mm (3.7 inches)76%very high
September Weather19°C (66°F)110 mm (4.3 inches)79%very high
October Weather11°C (52°F)111 mm (4.4 inches)83%moderate
November Weather3°C (37°F)45 mm (1.8 inches)88%moderate
December Weather-1°C (30°F)50 mm (2.0 inches)81%low

Compare Janesville's Climate with Cities Worldwide