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April Weather in Marshalltown, United States

Last updated: June 24, 2025

In April, the average temperature in Marshalltown, United States hovers around 9°C (48°F). You can expect a minimum chill of -11°C (13°F) and the occasional warm day reaching up to 29°C (85°F). Throughout the month, 83 mm (3.3 in) of precipitation is likely to fall over 11 days, leaving the air with an average humidity of 77%. Stay prepared and embrace the variability of the weather!

April Temperature in Marshalltown

In April in Marshalltown, the average temperature is 9°C (48°F), with maximums reaching up to 29°C (85°F) and minimums dropping as low as -11°C (13°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold weather.

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

The chart illustrates April 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, April typically has an average temperature of 9°C (48°F), with highs reaching up to 29°C (85°F) and lows dropping to around -11°C (13°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.

April Precipitation in Marshalltown

In Marshalltown in April, the precipitation amount is 83 mm (3.3 in) over the course of 11 days.

April Precipitation Trends in Marshalltown

The chart displays monthly precipitation patterns in Marshalltown, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Marshalltown, April typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec4045758315412182611131374536
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Marshalltown

In Marshalltown in April, humidity is 77%. With an average temperature of 9°C (48°F), this humidity feels like a damp embrace, making traveling a bit more challenging as the cool air combines with the moisture, often leaving you with a chill that seeps into your bones.

April Average Humidity in Marshalltown

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

April UV Index in Marshalltown

In Marshalltown in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Marshalltown.

Maximum UV Index Levels in Marshalltown for April

The chart shows the monthly maximum UV Index (UVI) for Marshalltown in April, 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 April, the maximum UV index in Marshalltown typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098643
Data source: Marshalltown April 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 April 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 April’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 April’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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