July weather forecastCastle Rock, WA
July
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 15h and 24min
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: 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: 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: 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: 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).
