July weather forecast
Castle Rock, WA

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Weather in July

July in Castle Rock, Washington, is a moderately hot summer month, with an average temperature fluctuating between 76.6°F (24.8°C) and 48°F (8.9°C).

Temperature

July's arrival signals a subtle increase in average high-temperatures, moving from June's pleasant 69.3°F (20.7°C) to a warm 76.6°F (24.8°C). Castle Rock, in the heat of July, registers a significant plunge to a mean of 48°F (8.9°C) during the nights.

Humidity

The months with the lowest humidity in Castle Rock are July and August, with an average relative humidity of 73%.

Rainfall

In Castle Rock, Washington, during July, the rain falls for 6.1 days and regularly aggregates up to 0.35" (9mm) of precipitation. In Castle Rock, Washington, during the entire year, the rain falls for 157.3 days and collects up to 16.54" (420mm) of precipitation.

Snowfall

April through October are months without snowfall in Castle Rock, Washington.

Daylight

In Castle Rock, the average length of the day in July is 15h and 21min.
On the first day of July, sunrise is at 5:24 am and sunset at 9:07 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 8:42 pm PDT.

Sunshine

The average sunshine in July in Castle Rock is 10h.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 5 during July translates into the following guidance:
Be vigilant - Preventing sunburn is recommended. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are July temperatures in Castle Rock?

The high-temperature, in July, in Castle Rock, records 76.6°F (24.8°C), while the low-temperature is 48°F (8.9°C).

What is the least humid month in Castle Rock?

July and August, with an average relative humidity of 73%, are the least humid months in Castle Rock, Washington.

What is the average humidity in July in Castle Rock?

The average relative humidity in July is 73%.

How many days does it rain in July in Castle Rock?

In Castle Rock, during July, the rain falls for 6.1 days and regularly aggregates up to 0.35" (9mm) of precipitation.

When it does not snow in Castle Rock?

In Castle Rock, snow does not fall in April through October.

How many hours of daylight does Castle Rock have in July?

The average day length in July in Castle Rock, Washington, is 15h and 21min.

When is the sunrise / sunset in July in Castle Rock?

On the first day of July in Castle Rock, sunrise is at 5:24 am and sunset at 9:07 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 8:42 pm PDT.

How many hours of sunshine does Castle Rock have in July?

In Castle Rock, Washington, the average sunshine duration in July is 10h.

What are the months with the highest UV index in Castle Rock?

June and July, with an average maximum UV index of 5, are months with the highest UV index in Castle Rock.

What is the UV index intensity in July in Castle Rock?

The average daily maximum UV index in July is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
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
Castle Rock, WA

Average temperature in July - Castle Rock, WA
  • Average high temperature in July: 76.6°F

The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (42.4°F).

  • Average low temperature in July: 48°F

The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (32.5°F).

Average pressure in July
Castle Rock, WA

Average pressure in July - Castle Rock, WA
  • Average pressure in July: 30.05"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

Average wind speed in July
Castle Rock, WA

Average wind speed in July - Castle Rock, WA
  • Average wind speed in July: 4mph

The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest months (with the lowest average wind speed) are August and September (3.7mph).

Average humidity in July
Castle Rock, WA

Average humidity in July - Castle Rock, WA
  • Average humidity in July: 73%

The months with the highest relative humidity are February and November (89%).
The months with the lowest relative humidity are July and August (73%).

Average rainfall in July
Castle Rock, WA

Average rainfall in July - Castle Rock, WA
  • Average rainfall in July: 0.35"

The wettest month (with the highest rainfall) is January (2.28").
The driest month (with the least rainfall) is August (0.31").

Average rainfall days in July
Castle Rock, WA

Average rainfall days in July - Castle Rock, WA
  • Average rainfall days in July: 6.1 days

The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is July (6.1 days).

Average snowfall in July
Castle Rock, WA

Average snowfall in July - Castle Rock, WA
  • Average snowfall in July: 0"

The month with the highest snowfall is February (1.02").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in July
Castle Rock, WA

Average snowfall days in July - Castle Rock, WA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in July /
Average sunshine in July
Castle Rock, WA

Average daylight in July / Average sunshine in July - Castle Rock, WA
  • Average daylight in July: 15h and 2min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in July: 10h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).

Average sunshine days in July
Castle Rock, WA

Average sunshine days in July - Castle Rock, WA
  • Average sunshine days in July: 21.8 days

The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is April (10.5 days).

Average UV index in July
Castle Rock, WA

Average UV index in July - Castle Rock, WA
  • Average UV index in July: 5

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in July
Castle Rock, WA

Average cloud cover in July - Castle Rock, WA
  • Average cloud cover in July: 39

The month with the most cloud cover is February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 37).

Average visibility in July
Castle Rock, WA

Average visibility in July - Castle Rock, WA
  • Average visibility in July: 4mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).

Castle Rock, Washington, USA

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