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April Weather in Mason City, United States

Last updated: June 24, 2025

In April, the average temperature in Mason City, United States hovers around 11°C (52°F), with a minimum as low as -8°C (18°F) and a maximum soaring to 29°C (84°F). Expect about 120 mm (4.7 in) of precipitation spread over 11 days, contributing to a notable average humidity of 85%. Prepare accordingly for a month filled with diverse weather conditions!

April Temperature in Mason City

In April in Mason City, the average temperature is 11°C (52°F), with maximums reaching as high as 29°C (84°F) and minimums dipping down to -8°C (18°F). Travelers should be prepared for a wide range of temperatures, making layered clothing essential.

April Weather in Mason City: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Mason City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mason City, April typically has an average temperature of 11°C (52°F), with highs reaching up to 29°C (84°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec283143526575777470574135
Data source: Temperature data for Mason City 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 Mason City

In Mason City in April, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.

April Precipitation Trends in Mason City

The chart displays monthly precipitation patterns in Mason City, 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 Mason City, April typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec666812312015613611797681146353
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Mason City

In Mason City in April, humidity is 85%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapping around you, making travel quite uncomfortable as the air feels heavy and can sap your energy.

April Average Humidity in Mason City

This chart illustrates the average monthly humidity levels in Mason City, 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 Mason City is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Mason City

In Mason City 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 Mason City.

Maximum UV Index Levels in Mason City for April

The chart shows the monthly maximum UV Index (UVI) for Mason City 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 Mason City typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357810111098642
Data source: Mason City 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 Mason City Compares to Other Months

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

This table compares monthly weather conditions in Mason City, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)66 mm (2.6 inches)82%moderate
February Weather-1°C (31°F)67 mm (2.7 inches)83%moderate
March Weather6°C (43°F)123 mm (4.8 inches)84%high
April Weather11°C (52°F)120 mm (4.7 inches)85%very high
May Weather18°C (65°F)156 mm (6.1 inches)79%very high
June Weather24°C (75°F)136 mm (5.4 inches)82%extreme
July Weather25°C (78°F)117 mm (4.6 inches)80%very high
August Weather24°C (75°F)97 mm (3.8 inches)81%very high
September Weather21°C (71°F)68 mm (2.7 inches)80%very high
October Weather14°C (57°F)114 mm (4.5 inches)82%high
November Weather5°C (42°F)63 mm (2.5 inches)88%moderate
December Weather2°C (36°F)53 mm (2.1 inches)84%low

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