April Weather in Williston, United States

Last updated: June 24, 2025

In Williston, United States, the average temperature in April hovers around 3°C (38°F). You can expect extreme variations, with a minimum plunging to -21°C (-5°F) and a maximum reaching 25°C (78°F). During this time, precipitation averages 28 mm (1.1 in) over 5 days, and humidity levels sit at a comfortable 74%, creating a unique climate experience.

April Temperature in Williston

In April in Williston, the average temperature is 3°C (38°F). Maximums can reach 25°C (78°F), while minimums can drop to as low as -21°C (-5°F). It's advisable to pack layers and be prepared for a wide range of temperatures when traveling 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 3°C (38°F), with highs reaching up to 25°C (78°F) and lows dropping to around -21°C (-5°F).

Data source: Temperature data for Williston generated using information from the Copernicus Climate Change Service.

April Precipitation in Williston

In Williston in April, the precipitation amount is 28 mm (1.1 in) over a period of 5 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 28 mm (1.1 inches) of precipitation spread over approximately 5 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Williston

In Williston in April humidity is 74%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as you navigate through the foggy atmosphere.

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 74%, offering insight into how humid the weather typically is during this month.

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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (14°F)	11 mm (0.4 inches)	89%	low
February Weather	-12°C (11°F)	18 mm (0.7 inches)	92%	moderate
March Weather	-2°C (28°F)	23 mm (0.9 inches)	84%	moderate
April Weather	3°C (38°F)	28 mm (1.1 inches)	74%	very high
May Weather	12°C (55°F)	45 mm (1.8 inches)	73%	very high
June Weather	19°C (66°F)	74 mm (2.9 inches)	69%	very high
July Weather	22°C (71°F)	58 mm (2.3 inches)	76%	very high
August Weather	20°C (68°F)	44 mm (1.7 inches)	74%	very high
September Weather	15°C (58°F)	59 mm (2.3 inches)	65%	high
October Weather	5°C (42°F)	30 mm (1.2 inches)	71%	moderate
November Weather	-2°C (29°F)	19 mm (0.7 inches)	84%	low
December Weather	-7°C (20°F)	19 mm (0.8 inches)	92%	low