July weather forecast
Casper, WY

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The calm North Platte River flowing through downtown Casper in Wyoming
The calm North Platte River flowing through downtown Casper in Wyoming

Weather in July

July in Casper, Wyoming, truly personifies the summer season with a peak recorded temperature of 83.5°F (28.6°C). Record summer heat, long daylight hours and wealthy sunshine of 11.9 hours paints a typical summer picture. Despite less frequent rainfall, the city retains its green glow under the bright sun. Outdoor activities are at their peak with inviting warmth and plenty of daylight. Come July, Casper basks in the peak of summer, offering clear, warm days.

Temperature

The average temperatures reach their apex in July, averaging 83.5°F (28.6°C) at the high end and 59.5°F (15.3°C) at the low end.

Humidity

The average relative humidity in July is 39%.

Rainfall

In Casper, in July, during 8.4 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, in Casper, there are 91.6 rainfall days, and 9.69" (246mm) of precipitation is accumulated.

Snowfall

June through August are months without snowfall.

Daylight

In July, the average length of the day in Casper, Wyoming, is 14h and 58min.
On the first day of the month, sunrise is at 5:30 am and sunset at 8:47 pm. On the last day of July, in Casper, sunrise is at 5:56 am and sunset at 8:26 pm MDT.

Sunshine

July and August, with an average of 11.9h of sunshine, are months with the most sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 6 in July translates into these instructions:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the warmest months in Casper?

With its average high temperature of 83.5°F (28.6°C) and a low of 59.5°F (15.3°C), July is regarded as the warmest month.

How hot is July in Casper?

In Casper, 83.5°F (28.6°C) is the average high-temperature and 59.5°F (15.3°C) is the average low-temperature during July.

What is the average humidity in July in Casper?

The average relative humidity in July in Casper is 39%.

How much does it rain in Casper in July?

In Casper, Wyoming, in July, during 8.4 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

When it does not snow in Casper?

In Casper, Wyoming, snow does not fall in June through August.

How many hours of daylight does Casper have in July?

The average day length in July in Casper is 14h and 58min.

What time are sunrise and sunset in July in Casper?

On the first day of July, sunrise is at 5:30 am and sunset at 8:47 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 8:26 pm MDT.

What are the months with the most sunshine in Casper?

The months with the most sunshine in Casper are July and August, with an average of 11.9h of sunshine.

How long on average sun shines in July in Casper?

In Casper, Wyoming, the average sunshine duration in July is 11.9h.

When is the highest UV index in Casper?

The months with the highest UV index in Casper, Wyoming, are June through August, with an average maximum UV index of 6.

What is the UV index reading in July in Casper?

In July, the average daily maximum UV index in Casper, Wyoming, is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Casper, WY

Average temperature in July - Casper, WY
  • Average high temperature in July: 83.5°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28.4°F).

  • Average low temperature in July: 59.5°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is December (15.1°F).

Average pressure in July
Casper, WY

Average pressure in July - Casper, WY
  • Average pressure in July: 29.92"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in July
Casper, WY

Average wind speed in July - Casper, WY
  • Average wind speed in July: 8.5mph

The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).

Average humidity in July
Casper, WY

Average humidity in July - Casper, WY
  • Average humidity in July: 39%

The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (37%).

Average rainfall in July
Casper, WY

Average rainfall in July - Casper, WY
  • Average rainfall in July: 0.63"

The wettest month (with the highest rainfall) is May (1.77").
The driest months (with the least rainfall) are January, August and September (0.43").

Average rainfall days in July
Casper, WY

Average rainfall days in July - Casper, WY
  • Average rainfall days in July: 8.4 days

The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is January (3.6 days).

Average snowfall in July
Casper, WY

Average snowfall in July - Casper, WY
  • Average snowfall in July: 0"

The month with the highest snowfall is November (5.47").
The months with the least snowfall are June, July and August (0").

Average snowfall days in July
Casper, WY

Average snowfall days in July - Casper, WY
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in July /
Average sunshine in July
Casper, WY

Average daylight in July / Average sunshine in July - Casper, WY
  • Average daylight in July: 15h and 0min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in July: 11h and 5min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).

Average sunshine days in July
Casper, WY

Average sunshine days in July - Casper, WY
  • Average sunshine days in July: 17.9 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.9 days).

Average UV index in July
Casper, WY

Average UV index in July - Casper, WY
  • Average UV index in July: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in July
Casper, WY

Average cloud cover in July - Casper, WY
  • Average cloud cover in July: 14

The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility in July
Casper, WY

Average visibility in July - Casper, WY
  • Average visibility in July: 6mi

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

Casper, Wyoming, USA

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