July weather forecast and climate
Williston, NY

July is a warm summer month in Williston, New York, with average temperature varying between 79.2°F (26.2°C) and 61°F (16.1°C).

Temperature

The warmest month is July, with an average high-temperature of 79.2°F (26.2°C) and an average low-temperature of 61°F (16.1°C).

Humidity

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

Rainfall

In Williston, New York, during 18 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. Throughout the year, in Williston, there are 161.8 rainfall days, and 21.93" (557mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Williston, New York.

Daylight

In Williston, the average length of the day in July is 15h.

Sunshine

July has the most sunshine of the year in Williston, with an average of 10.3h of sunshine.

UV index

With an average maximum UV index of 6, July is the month with the highest UV index in Williston. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in July transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.

What is the warmest month in Williston?

The warmest month in Williston, New York, is July, with an average high-temperature of 79.2°F (26.2°C) and an average low-temperature of 61°F (16.1°C).

What is the temperature in July in Williston?

In July, in Williston, New York, the average high-temperature is 79.2°F (26.2°C), and the average low-temperature is 61°F (16.1°C).

What are the least humid months in Williston?

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

What is the average humidity in July in Williston?

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

How many days does it rain in July in Williston?

In July, in Williston, New York, the rain falls for 18 days. Throughout July, 2.2" (56mm) of precipitation is accumulated.

When it does not snow in Williston?

In Williston snow does not fall in June through September.

How many hours of daylight does Williston have in July?

In July, the average length of the day in Williston, New York, is 15h.

What month has the most sunshine in Williston?

July has the most sunshine of the year in Williston, New York, with an average of 10.3h of sunshine.

How long on average sun shines in July in Williston?

In Williston, the average sunshine in July is 10.3h.

When is the highest UV index in Williston?

July is the month with the highest UV index in Williston, New York, with an average maximum UV index of 6.

How high is the UV index in July in Williston?

The average daily maximum UV index in July in Williston, New York, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to the Sun's UV rays.
Average temperature in July - Williston, NY
  • Average high temperature in July: 26.2°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 July: 16.1°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 July - Williston, NY
  • Average pressure in July: 1014.3mbar

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 July - Williston, NY
  • Average wind speed in July: 10.3km/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 July - Williston, NY
  • Average humidity in July: 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 July - Williston, NY
  • Average rainfall in July: 56mm

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

Average rainfall days in July - Williston, NY
  • Average rainfall days in July: 18 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 July - Williston, NY
  • Average snowfall in July: 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 July - Williston, NY
  • Average snowfall days in July: 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 July / Average sunshine in July - Williston, NY
  • Average daylight in July: 15h

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 July: 10.3h

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 July - Williston, NY
  • Average sunshine days in July: 10.5 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 July - Williston, NY
  • Average UV index in July: 6

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 July - Williston, NY
  • Average cloud cover in July: 34

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