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April Weather in Williston, United States

Last updated: June 24, 2025

In Williston, United States, the average temperature in April hovers around 6°C (43°F), with a range that can dip as low as -8°C (18°F) and peak at 25°C (77°F). During this month, expect 109 mm (4.3 in) of precipitation spread over 15 days, contributing to an average humidity of 85%. Stay prepared for varying weather conditions!

April Temperature in Williston

In April in Williston, the average temperature is 6°C (43°F), with maximums reaching up to 25°C (77°F) and minimums dropping as low as -8°C (18°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates April temperature patterns in Williston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williston, April typically has an average temperature of 6°C (43°F), with highs reaching up to 25°C (77°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec202330435665716961503526
Data source: Temperature data for Williston 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 Williston

In Williston in April, the precipitation amount is 109 mm (4.3 in) spread over 15 days.

April Precipitation Trends in Williston

The chart displays monthly precipitation patterns in Williston, 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 Williston, April typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec8481771099197108877115211280
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Williston

In Williston in April, humidity is 85%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making travel feel more uncomfortable and limiting your enjoyment of the sights as you navigate the wet, brisk air.

April Average Humidity in Williston

This chart illustrates the average monthly humidity levels in Williston, 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 Williston is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Williston

In Williston 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 Williston.

Maximum UV Index Levels in Williston for April

The chart shows the monthly maximum UV Index (UVI) for Williston 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 Williston typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Williston 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 Williston Compares to Other Months

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

This table compares monthly weather conditions in Williston, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)84 mm (3.3 inches)93%low
February Weather-5°C (23°F)81 mm (3.2 inches)92%moderate
March Weather-1°C (30°F)77 mm (3.0 inches)86%moderate
April Weather6°C (43°F)109 mm (4.3 inches)85%very high
May Weather13°C (56°F)91 mm (3.6 inches)80%very high
June Weather18°C (65°F)97 mm (3.8 inches)74%very high
July Weather21°C (71°F)108 mm (4.2 inches)76%very high
August Weather20°C (69°F)87 mm (3.4 inches)75%very high
September Weather16°C (62°F)71 mm (2.8 inches)78%high
October Weather10°C (50°F)152 mm (6.0 inches)86%moderate
November Weather2°C (35°F)112 mm (4.4 inches)88%moderate
December Weather-3°C (26°F)80 mm (3.2 inches)89%low

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