Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
In Issaquah, the average high-temperature in April slightly rises, from a cool 50°F (10°C) in March, to a moderate 55.9°F (13.3°C). In the month of April, the average temperature dips to a cold 37.9°F (3.3°C) during the night.Humidity
The average relative humidity in April is 80%.Rainfall
In Issaquah, in April, during 13.1 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. In Issaquah, during the entire year, the rain falls for 127.4 days and collects up to 12.52" (318mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows in Issaquah. During 0.2 snowfall days, in April, Issaquah aggregates 0.04" (1mm) of snow. In Issaquah, during the entire year, snow falls for 5.9 days and aggregates up to 1.93" (49mm) of snow.Daylight
The average length of the day in April is 13h and 40min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:38 pm. On the last day of April, sunrise is at 5:51 am and sunset at 8:19 pm PDT.
Sunshine
In Issaquah, the average sunshine in April is 7.6h.UV index
In April, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In April, the maximum UV index of 3 suggests these recommendations:
Guard yourself - Avoiding sunburn is suggested. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April?
What is the average humidity in April?
How many days does it rain in April?
What is the last month it snows?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
How high is the UV index in April?
Average temperature in April
Issaquah, WA
- Average high temperature in April: 55.9°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in April: 37.9°F
The month with the highest average low temperature is August (51.4°F).
The coldest months (with the lowest average low temperature) are February and December (33.4°F).
Average pressure in April
Issaquah, WA
- Average pressure in April: 30.04"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in April
Issaquah, WA
- Average wind speed in April: 4.2mph
The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in April
Issaquah, WA
- Average humidity in April: 80%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is July (69%).
Average rainfall in April
Issaquah, WA
- Average rainfall in April: 1.02"
The wettest month (with the highest rainfall) is December (2.01").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in April
Issaquah, WA
- Average rainfall days in April: 13.1 days
The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is August (4.3 days).
Average snowfall in April
Issaquah, WA
- Average snowfall in April: 0.04"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Issaquah, WA
- Average snowfall days in April: 0.2 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Issaquah, WA
- Average daylight in April: 13h and 4min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in April: 7h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in April
Issaquah, WA
- Average sunshine days in April: 14.3 days
The month with the most sunshine days is August (25 days).
The month with the least sunshine days is February (12.9 days).
Average UV index in April
Issaquah, WA
- Average UV index in April: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Issaquah, WA
- Average cloud cover in April: 54
The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in April
Issaquah, WA
- Average visibility in April: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February and December (4mi).
Issaquah, Washington, USA
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