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March Weather in Marshalltown, United States

Last updated: June 24, 2025

In Marshalltown, United States, the average temperature for March is a crisp 3°C (38°F). Expect minimums to dip as low as -22°C (-7°F), while some days may warm up to a pleasant 22°C (72°F). Be prepared for 75 mm (2.9 in) of precipitation spread across 8 days during the month, and keep in mind that the average humidity hovers around 77%.

March Temperature in Marshalltown

In March in Marshalltown, the average temperature is 3°C (38°F), with maximums reaching 22°C (72°F) and minimums dropping as low as -22°C (-7°F). Be prepared for a wide range of temperatures to make the most of your trip!

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

The chart illustrates March temperature patterns in Marshalltown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marshalltown, March typically has an average temperature of 3°C (38°F), with highs reaching up to 22°C (72°F) and lows dropping to around -22°C (-7°F).
JanFebMarAprMayJunJulAugSepOctNovDec212238486273767367523730
Data source: Temperature data for Marshalltown 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.

March Precipitation in Marshalltown

In Marshalltown in March, the precipitation amount is 75 mm (2.9 in) over a span of 8 days.

March Precipitation Trends in Marshalltown

The chart displays monthly precipitation patterns in Marshalltown, 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 Marshalltown, March typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4045758315412182611131374536
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Marshalltown

In Marshalltown in March humidity is 77%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill enveloping you, making any outdoor adventure feel more intense as you navigate the biting cold mixed with the heavy air.

March Average Humidity in Marshalltown

This chart illustrates the average monthly humidity levels in Marshalltown, 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 Marshalltown is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Marshalltown

In Marshalltown 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 Marshalltown, you can refer to this Hourly UV Index in Marshalltown.

Maximum UV Index Levels in Marshalltown for March

The chart shows the monthly maximum UV Index (UVI) for Marshalltown 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 Marshalltown typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098643
Data source: Marshalltown 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 Marshalltown Compares to Other Months

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

This table compares monthly weather conditions in Marshalltown, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)40 mm (1.6 inches)78%moderate
February Weather-6°C (22°F)45 mm (1.8 inches)80%moderate
March Weather3°C (38°F)75 mm (2.9 inches)77%high
April Weather9°C (48°F)83 mm (3.3 inches)77%very high
May Weather16°C (62°F)154 mm (6.1 inches)77%very high
June Weather23°C (73°F)121 mm (4.8 inches)81%extreme
July Weather24°C (76°F)82 mm (3.2 inches)81%very high
August Weather23°C (73°F)61 mm (2.4 inches)77%very high
September Weather20°C (68°F)113 mm (4.5 inches)73%very high
October Weather11°C (52°F)137 mm (5.4 inches)75%high
November Weather3°C (38°F)45 mm (1.8 inches)85%moderate
December Weather-1°C (30°F)36 mm (1.4 inches)83%moderate

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