July weather forecast
Jamestown, VA

Weather in July

July in Jamestown, Virginia, is a tropical summer month, with average temperature fluctuating between 71.1°F (21.7°C) and 88.3°F (31.3°C).

Temperature

With an average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 71.1°F (21.7°C), July is the warmest month.

Heat index

The average heat index is calculated to be a torrid 102.9°F (39.4°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like wind, differences in body mass, height, and shape, clothing, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

July is the least humid month in Jamestown, with an average relative humidity of 73%.

Rainfall

In Jamestown, during 15.3 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Jamestown, Virginia, during the entire year, the rain falls for 148.7 days and collects up to 20.35" (517mm) of precipitation.

Snowfall

In Jamestown snow does not fall in April through October.

Daylight

In Jamestown, the average length of the day is 14.4h.

Sunshine

With an average of 10.8h of sunshine, July has the most sunshine of the year.

UV index

In July, the average daily maximum UV index in Jamestown, Virginia, is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.
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FAQ

What is the warmest month in Jamestown?

The warmest month in Jamestown is July, with an average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 71.1°F (21.7°C).

What is the temperature in July in Jamestown?

In Jamestown, in July, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 71.1°F (21.7°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, in July is calculated to be 102.9°F (39.4°C).

What is the least humid month in Jamestown?

July is the least humid month in Jamestown, Virginia, with an average relative humidity of 73%.

What is the average humidity in July in Jamestown?

The average relative humidity in July is 73%.

How many days does it rain in July in Jamestown?

In Jamestown, Virginia, in July, during 15.3 rainfall days, 2.01" (51mm) of precipitation is typically accumulated.

When it does not snow in Jamestown?

April through October are months without snowfall in Jamestown, Virginia.

How many hours of daylight does Jamestown have in July?

In July, the average length of the day is 14.4h.

What month has the most sunshine in Jamestown?

July has the most sunshine of the year in Jamestown, Virginia, with an average of 10.8h of sunshine.

How many hours of sunshine does Jamestown have in July?

In Jamestown, the average sunshine in July is 10.8h.

How high is the UV index in July in Jamestown?

The average daily maximum UV index in July in Jamestown, Virginia, is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in July
Jamestown, VA

Average temperature in July - Jamestown, VA
  • Average high temperature in July: 88.3°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (45.1°F).

  • Average low temperature in July: 71.1°F

The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

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Average pressure in July
Jamestown, VA

Average pressure in July - Jamestown, VA
  • Average pressure in July: 29.97"

The month with the highest atmospheric pressure is November (30.14").
The month with the lowest atmospheric pressure is June (29.95").

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Average wind speed in July
Jamestown, VA

Average wind speed in July - Jamestown, VA
  • Average wind speed in July: 6.4mph

The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in July
Jamestown, VA

Average humidity in July - Jamestown, VA
  • Average humidity in July: 73%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (73%).

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Average rainfall in July
Jamestown, VA

Average rainfall in July - Jamestown, VA
  • Average rainfall in July: 2.01"

The wettest month (with the highest rainfall) is August (2.36").
The driest months (with the least rainfall) are October and December (1.38").

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Average rainfall days in July
Jamestown, VA

Average rainfall days in July - Jamestown, VA
  • Average rainfall days in July: 15.3 days

The month with the highest number of rainy days is August (16.3 days).
The month with the least rainy days is November (8.5 days).

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Average snowfall in July
Jamestown, VA

Average snowfall in July - Jamestown, VA
  • Average snowfall in July: 0"

The month with the highest snowfall is February (0.87").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in July
Jamestown, VA

Average snowfall days in July - Jamestown, VA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (3.1 days).
Months with the least snowfall days are May, June, July, August and October (0 days).

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Average daylight in July /
Average sunshine in July
Jamestown, VA

Average daylight in July / Average sunshine in July - Jamestown, VA
  • Average daylight in July: 14.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in July: 10.8h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5.3h).

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Average sunshine days in July
Jamestown, VA

Average sunshine days in July - Jamestown, VA
  • Average sunshine days in July: 13.4 days

Months with the most sunshine days are October and November (19.7 days).
The month with the least sunshine days is August (12.2 days).

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Average UV index in July
Jamestown, VA

Average UV index in July - Jamestown, VA
  • Average UV index in July: 6

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in July
Jamestown, VA

Average cloud cover in July - Jamestown, VA
  • Average cloud cover in July: 28

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in July
Jamestown, VA

Average visibility in July - Jamestown, VA
  • Average visibility in July: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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