April weather forecast and climate
Williston, NY

April is a fresh spring month in Williston, New York, with temperature in the range of an average high of 52.7°F (11.5°C) and an average low of 36°F (2.2°C).

Temperature

In Williston, the average high-temperature rises, from a cold 40.6°F (4.8°C) in March, to a fresh 52.7°F (11.5°C). The average low-temperature, in Williston, is 36°F (2.2°C).

Humidity

In Williston, New York, the average relative humidity is 78%.

Rainfall

In April, the rain falls for 15.9 days. Throughout April, 2.13" (54mm) of precipitation is accumulated. Throughout the year, in Williston, New York, there are 161.8 rainfall days, and 21.93" (557mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Williston, New York. In Williston, during April, snow falls for 4.8 days and regularly aggregates up to 2.09" (53mm) of snow. In Williston, during the entire year, snow falls for 78.6 days, and aggregates up to 25.24" (641mm) of snow.

Daylight

The average length of the day in Williston is 13.4h.

Sunshine

In April, the average sunshine in Williston is 7.1h.

UV index

The average daily maximum UV index in Williston is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 3 in April interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in April in Williston?

In April, the average high-temperature is 52.7°F (11.5°C), and the average low-temperature is 36°F (2.2°C).

What is the average humidity in April in Williston?

The average relative humidity in April is 78%.

How many days does it rain in April in Williston?

In Williston, during April, the rain falls for 15.9 days and regularly aggregates up to 2.13" (54mm) of precipitation.

How much does it snow in Williston in April?

In Williston, in April, during 4.8 snowfall days, 2.09" (53mm) of snow is typically accumulated.

How many hours of daylight does Williston have in April?

In Williston, New York, the average length of the day in April is 13.4h.

How many hours of sunshine does Williston have in April?

In April, the average sunshine in Williston is 7.1h.

What is the UV index intensity in April in Williston?

In April, the average daily maximum UV index in Williston, New York, is 3. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.
Average temperature in April - Williston, NY
  • Average high temperature in April: 11.5°C

The warmest month (with the highest average high temperature) is July (26.2°C).
The month with the lowest average high temperature is January (-1.7°C).

  • Average low temperature in April: 2.2°C

The month with the highest average low temperature is July (16.1°C).
The coldest month (with the lowest average low temperature) is January (-7.7°C).

Average pressure in April - Williston, NY
  • Average pressure in April: 1014.8mbar

The month with the highest atmospheric pressure is November (1018.9mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).

Average wind speed in April - Williston, NY
  • Average wind speed in April: 14.3km/h

The windiest month (with the highest average wind speed) is January (16.6km/h).
The calmest month (with the lowest average wind speed) is July (10.3km/h).

Average humidity in April - Williston, NY
  • Average humidity in April: 78%

Months with the highest relative humidity are January and February (87%).
Months with the lowest relative humidity are May, July and August (77%).

Average rainfall in April - Williston, NY
  • Average rainfall in April: 54mm

The wettest month (with the highest rainfall) is May (62mm).
The driest month (with the least rainfall) is September (34mm).

Average rainfall days in April - Williston, NY
  • Average rainfall days in April: 15.9 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (6.8 days).

Average snowfall in April - Williston, NY
  • Average snowfall in April: 53mm

The month with the highest snowfall is February (168mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in April - Williston, NY
  • Average snowfall days in April: 4.8 days

The month with the highest number of snowfall days is January (19 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in April / Average sunshine in April - Williston, NY
  • Average daylight in April: 13.4h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in April: 7.1h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 2.3h).

Average sunshine days in April - Williston, NY
  • Average sunshine days in April: 9.8 days

The month with the most sunshine days is June (13.4 days).
The month with the least sunshine days is February (6.7 days).

Average UV index in April - Williston, NY
  • Average UV index in April: 3

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

Average cloud cover in April - Williston, NY
  • Average cloud cover in April: 53

The month with the most cloud cover is January (Cloud cover 78).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in April - Williston, NY
  • Average visibility in April: 9km

Months with the highest visibility are April, May, June, July, August, September, October and November (9km).
Months with the lowest visibility are January, February, March and December (8km).