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

July weather forecast and climate
Williston, ND

July, the same as June, is a moderately hot summer month in Williston, North Dakota, with average temperature ranging between max 84.4°F (29.1°C) and min 55.8°F (13.2°C).

Temperature

July is the warmest month, with an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 55.8°F (13.2°C).

Heat index

In July, the average heat index is appraised at a hot 87.1°F (30.6°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, differences in body mass, height, and shape, pregnancy). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in July is 56.1%.

Rainfall

July is the month with the most rainfall. Rain falls for 9 days and accumulates 2.5" (64.5mm) of precipitation.

Snowfall

In Williston snow does not fall in June through August.

Daylight

In Williston, the average length of the day is 15.6h.

Sunshine

July has the most sunshine of the year in Williston, with an average of 11.8h of sunshine.

UV index

July is the month with the highest UV index, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high health hazard from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 8 transform into the following instructions:
Take extra precautions. Protection against sun damage is required. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the warmest month in Williston?

With an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 55.8°F (13.2°C), July is the warmest month.

What is the temperature in July in Williston?

In Williston, North Dakota, in July, the average high-temperature is 84.4°F (29.1°C), and the average low-temperature is 55.8°F (13.2°C). In July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), that combines air temperature and relative humidity, is appraised at 87.1°F (30.6°C).

What is the average humidity in July in Williston?

The average relative humidity in July in Williston, North Dakota, is 56.1%.

How many days does it rain in July in Williston?

In Williston, in July, during 9 rainfall days, 2.5" (64.5mm) of precipitation is typically accumulated.

What is the rainiest month in Williston?

July is the month with the most rainfall. Rain falls for 9 days and accumulates 2.5" (64.5mm) of precipitation.

When it does not snow in Williston?

In Williston, North Dakota, snow does not fall in June through August.

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

The average length of the day in July is 15.6h.

What month has the most sunshine in Williston?

With an average of 11.8h of sunshine, July has the most sunshine of the year in Williston, North Dakota.

How long on average sun shines in July in Williston?

In Williston, North Dakota, the average sunshine in July is 11.8h.

When is the highest UV index in Williston?

July is the month with the highest UV index, with an average maximum UV index of 8.

What is the UV index reading in July in Williston?

In Williston, North Dakota, the average daily maximum UV index in July is 8. A UV Index estimate of 8 to 10 represents a very high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in July - Williston, ND
  • Average high temperature in July: 84.4°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 July: 55.8°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 July - Williston, ND
  • Average humidity in July: 56.1%

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 July - Williston, ND
  • Average rainfall in July: 2.5"

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 July - Williston, ND
  • Average rainfall days in July: 9 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 July - Williston, ND
  • Average snowfall in July: 0"

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

Average snowfall days in July - Williston, ND
  • Average snowfall days in July: 0 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 July / Average sunshine in July - Williston, ND
  • Average daylight in July: 15.6h

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 July: 11.8h

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 July - Williston, ND
  • Average UV index in July: 8

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).