April weather forecast
Issaquah, WA

Share

Weather in April

Arriving in April, Issaquah blossoms into the splendor of spring. Sunlight conditions drastically ameliorate, allotting the residents an amplified 7.6 hours of sunshine on average. The increased daylight hours, 13.7 in total, promise longer days. The city undergoes a significant drop in rainfall days-- reducing from 14.8 in March to 13.1 in April. Encompassing these positive changes, April manages to maintain a consistent overall pressure with March at 30.04" (763mm).

Temperature

In Issaquah, stepping into April brings a gentle temperature nudge, moving slightly up from March's cool 50°F (10°C) to a moderate 55.9°F (13.3°C). Issaquah experiences an average low-temperature reading of 37.9°F (3.3°C) throughout April.

Humidity

In Issaquah, the average relative humidity in April is 80%.

Rainfall

In Issaquah, in April, it is raining for 13.1 days, with typically 1.02" (26mm) of accumulated precipitation. In Issaquah, during the entire year, the rain falls for 127.4 days and collects up to 12.52" (318mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. 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

In Issaquah, 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, in Issaquah, 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

The average daily maximum UV index in April in Issaquah is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: During April, 3 as the daily maximum UV index converts into the following advice:
Make use of precautions - Suggestions to resist sunburn are communicated. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
[Resources]

Frequently asked questions

What is the average April temperature in Issaquah?

The average high-temperature, in April, in Issaquah, is 55.9°F (13.3°C), while the average low-temperature is 37.9°F (3.3°C).

What is the average humidity in April in Issaquah?

In Issaquah, Washington, the average relative humidity in April is 80%.

How much does it rain in Issaquah in April?

In April, in Issaquah, the rain falls for 13.1 days. Throughout April, 1.02" (26mm) of precipitation is accumulated.

What is the last month it snows in Issaquah?

April is the last month it regularly snows in Issaquah. During 0.2 snowfall days, in April, Issaquah aggregates 0.04" (1mm) of snow.

What is the average length of the day in April in Issaquah?

The average day length in April in Issaquah, Washington, is 13h and 40min.

What time are sunrise and sunset in April in Issaquah?

In April, on the first day of the month, sunrise is at 6:44 am and sunset at 7:38 pm. On the last day of the month, in Issaquah, Washington, sunrise is at 5:51 am and sunset at 8:19 pm PDT.

How many hours of sunshine does Issaquah have in April?

In Issaquah, Washington, the average sunshine duration in April is 7.6h.

How high is the UV index in April in Issaquah?

The average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a medium health risk 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 April
Issaquah, WA

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).

[Resources]

Average pressure in April
Issaquah, WA

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).

[Resources]

Average wind speed in April
Issaquah, WA

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).

[Resources]

Average humidity in April
Issaquah, WA

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%).

[Resources]

Average rainfall in April
Issaquah, WA

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").

[Resources]

Average rainfall days in April
Issaquah, WA

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).

[Resources]

Average snowfall in April
Issaquah, WA

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").

[Resources]

Average snowfall days in April
Issaquah, WA

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).

[Resources]

Average daylight in April /
Average sunshine in April
Issaquah, WA

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).

[Resources]

Average sunshine days in April
Issaquah, WA

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).

[Resources]

Average UV index in April
Issaquah, WA

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).

[Resources]

Average cloud cover in April
Issaquah, WA

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).

[Resources]

Average visibility in April
Issaquah, WA

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).

[Resources]

Issaquah, Washington, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location