August weather forecast and climate
Williston, NY

The last month of the summer, August, is also a moderately hot month in Williston, New York, with average temperature varying between 59.7°F (15.4°C) and 77.5°F (25.3°C).

Temperature

In August, the average high-temperature is essentially the same as in July - a still warm 77.5°F (25.3°C). In August, in Williston, the average low-temperature is 59.7°F (15.4°C).

Humidity

May, July and August, with an average relative humidity of 77%, are the least humid months.

Rainfall

In Williston, it is raining for 16.3 days, with typically 1.89" (48mm) of accumulated precipitation. In Williston, during the entire year, the rain falls for 161.8 days and collects up to 21.93" (557mm) of precipitation.

Snowfall

June through September are months without snowfall in Williston.

Daylight

In August, the average length of the day is 13.9h.

Sunshine

The average sunshine in August is 10.1h.

UV index

In Williston, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 5 in August 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.

What is the temperature in August in Williston?

The average high-temperature, in August, in Williston, New York, is 77.5°F (25.3°C), while the average low-temperature is 59.7°F (15.4°C).

What are the least humid months in Williston?

Months with the lowest humidity are May, July and August, with an average relative humidity of 77%.

What is the average humidity in August in Williston?

The average relative humidity in August in Williston, New York, is 77%.

How much does it rain in Williston in August?

In Williston, in August, during 16.3 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.

When it does not snow in Williston?

In Williston, New York, snow does not fall in June through September.

What is the average length of the day in August in Williston?

In August, the average length of the day in Williston, New York, is 13.9h.

How many hours of sunshine does Williston have in August?

In Williston, New York, the average sunshine in August is 10.1h.

What is the UV index intensity in August in Williston?

The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.
Average temperature in August - Williston, NY
  • Average high temperature in August: 25.3°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 August: 15.4°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 August - Williston, NY
  • Average pressure in August: 1015mbar

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 August - Williston, NY
  • Average wind speed in August: 10.5km/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 August - Williston, NY
  • Average humidity in August: 77%

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 August - Williston, NY
  • Average rainfall in August: 48mm

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

Average rainfall days in August - Williston, NY
  • Average rainfall days in August: 16.3 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 August - Williston, NY
  • Average snowfall in August: 0mm

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 August - Williston, NY
  • Average snowfall days in August: 0 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 August / Average sunshine in August - Williston, NY
  • Average daylight in August: 13.9h

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 August: 10.1h

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 August - Williston, NY
  • Average sunshine days in August: 11.6 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 August - Williston, NY
  • Average UV index in August: 5

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 August - Williston, NY
  • Average cloud cover in August: 32

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 August - Williston, NY
  • Average visibility in August: 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).