Williston
North Dakota, USA
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Williston, ND

April in Williston, North Dakota, is a mild spring month, with average temperature fluctuating between 29.7°F (-1.3°C) and 57°F (13.9°C).

Temperature

In Williston, the average high-temperature in April significantly increases, from a cold 40.5°F (4.7°C) in March, to a mild 57°F (13.9°C). In Williston, the average low-temperature is 29.7°F (-1.3°C).

Humidity

The average relative humidity in April is 61.4%.

Rainfall

In Williston, during 7.7 rainfall days, 1" (25.4mm) of precipitation is typically accumulated. In Williston, during the entire year, the rain falls for 96.5 days and collects up to 14.4" (364.9mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall.

Daylight

In Williston, the average length of the day in April is 13.7h.

Sunshine

In April, the average sunshine is 8.3h.

UV index

In Williston, the average daily maximum UV index in April is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
The average daily UV index of 5 in April transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in April in Williston?

The average high-temperature, in April, in Williston, is 57°F (13.9°C), while the average low-temperature is 29.7°F (-1.3°C).

What is the average humidity in April in Williston?

The average relative humidity in April is 61.4%.

How many days does it rain in April in Williston?

In Williston, in April, it is raining for 7.7 days, with typically 1" (25.4mm) of accumulated precipitation.

How many days does it snow in April in Williston?

In Williston, in April, during 2.4 snowfall days, 3.7" (94mm) of snow is typically accumulated.

How many hours of daylight does Williston have in April?

In Williston, the average length of the day in April is 13.7h.

How many hours of sunshine does Williston have in April?

In April, the average sunshine in Williston is 8.3h.

How high is the UV index in April in Williston?

In April, the average daily maximum UV index in Williston is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in April - Williston, ND
  • Average high temperature in April: 57°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (21.9°F).

  • Average low temperature in April: 29.7°F

The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is January (0.1°F).

Average humidity in April - Williston, ND
  • Average humidity in April: 61.4%

The month with the highest relative humidity is December (77.1%).
The month with the lowest relative humidity is August (54.9%).

Average rainfall in April - Williston, ND
  • Average rainfall in April: 1"

Wettest months (with the highest rainfall) are June and July (2.5").
The driest month (with the lowest rainfall) is February (0.4").

Average rainfall days in April - Williston, ND
  • Average rainfall days in April: 7.7 days

The month with the highest number of rainy days is June (11.5 days).
The month with the lowest number of rainy days is February (6 days).

Average snowfall in April - Williston, ND
  • Average snowfall in April: 3.7"

The month with the highest snowfall is January (10").
Months with the lowest snowfall are June, July and August (0").

Average snowfall days in April - Williston, ND
  • Average snowfall days in April: 2.4 days

The month with the highest number of snowfall days is December (9.1 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

Average daylight in April / Average sunshine in April - Williston, ND
  • Average daylight in April: 13.7h

The month with the longest days is June (Average daylight: 16h).
The month with shortest days is December (Average daylight: 8.4h).

  • Average sunshine in April: 8.3h

The month with most sunshine is July (Average sunshine: 11.8h).
The month with least sunshine is December (Average sunshine: 4h).

Average UV index in April - Williston, ND
  • Average UV index in April: 5

The month with the highest UV index is July (UV index 8).
Months with the lowest UV index are January, February, November and December (UV index 1).