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April Weather in Heron Lake, United States

Last updated: June 24, 2025

In April, the average temperature in Heron Lake, United States is 6°C (44°F), with a minimum of -16°C (4°F) and a maximum of 28°C (83°F). This month also brings a total precipitation of 91 mm (3.6 in) spread over 9 days. Expect the air to feel quite humid, with an average humidity of 79%.

April Temperature in Heron Lake

In April in Heron Lake, the average temperature is 6°C (44°F). The maximum can reach 28°C (83°F), while the minimum can drop as low as -16°C (4°F). Travelers should be prepared for a wide range of temperatures, making layering clothing essential for comfort during their visit.

April Weather in Heron Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Heron Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heron Lake, April typically has an average temperature of 6°C (44°F), with highs reaching up to 28°C (83°F) and lows dropping to around -16°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec181733435972747064483425
Data source: Temperature data for Heron Lake 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 Heron Lake

In Heron Lake in April, the precipitation amount is 91 mm (3.6 in) spread over 9 days.

April Precipitation Trends in Heron Lake

The chart displays monthly precipitation patterns in Heron Lake, 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 Heron Lake, April typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec31316891125127102115110923141
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Heron Lake

In Heron Lake in April, humidity is 79%. With an average temperature of 6°C (44°F), this humidity feels like a cold, damp chill that seeps into your bones, making travel feel less comfortable and more challenging as the wet air clings to your clothes and skin.

April Average Humidity in Heron Lake

This chart illustrates the average monthly humidity levels in Heron Lake, 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 Heron Lake is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%84%75%79%74%81%82%80%75%77%85%83%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Heron Lake

In Heron Lake 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 Heron Lake.

Maximum UV Index Levels in Heron Lake for April

The chart shows the monthly maximum UV Index (UVI) for Heron Lake 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 Heron Lake typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098533
Data source: Heron Lake 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 Heron Lake Compares to Other Months

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

This table compares monthly weather conditions in Heron Lake, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)31 mm (1.2 inches)80%moderate
February Weather-8°C (17°F)31 mm (1.2 inches)84%moderate
March Weather1°C (34°F)68 mm (2.7 inches)75%high
April Weather6°C (44°F)91 mm (3.6 inches)79%very high
May Weather15°C (59°F)125 mm (4.9 inches)74%very high
June Weather22°C (72°F)127 mm (5.0 inches)81%extreme
July Weather23°C (74°F)102 mm (4.0 inches)82%very high
August Weather21°C (70°F)115 mm (4.5 inches)80%very high
September Weather18°C (65°F)110 mm (4.3 inches)75%very high
October Weather9°C (48°F)92 mm (3.6 inches)77%moderate
November Weather1°C (34°F)31 mm (1.2 inches)85%moderate
December Weather-4°C (25°F)41 mm (1.6 inches)83%moderate

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