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
The transition from March to April brings a subtle temperature rise, with average high-temperatures increasing from a fresh 50°F (10°C) to a refreshing 55.8°F (13.2°C). In West Lake Sammamish, the nighttime temperature averages to a cold 38.8°F (3.8°C) during April.Humidity
In West Lake Sammamish, Washington, the average relative humidity in April is 80%.Rainfall
In West Lake Sammamish, during April, the rain falls for 14 days and regularly aggregates up to 1.22" (31mm) of precipitation. In West Lake Sammamish, Washington, during the entire year, the rain falls for 136.7 days and collects up to 13.39" (340mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.4 snowfall days, in April, West Lake Sammamish aggregates 0.12" (3mm) of snow. Throughout the year, there are 9.3 snowfall days, and 3.27" (83mm) of snow is accumulated.Daylight
In West Lake Sammamish, the average length of the day in April is 13h and 40min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:39 pm. On the last day of April, sunrise is at 5:51 am and sunset at 8:19 pm PDT.
Sunshine
In West Lake Sammamish, the average sunshine in April is 7.9h.UV index
In April, the average daily maximum UV index in West Lake Sammamish is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 3 in April, converts into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What is the average April temperature in West Lake Sammamish?
What is the average humidity in April in West Lake Sammamish?
How many days does it rain in April in West Lake Sammamish?
What is the last month it snows in West Lake Sammamish?
How many hours of daylight does West Lake Sammamish have in April?
When are sunrise and sunset in April in West Lake Sammamish?
How long on average sun shines in April in West Lake Sammamish?
What is the UV index reading in April in West Lake Sammamish?
Average temperature in April
West Lake Sammamish, WA
- Average high temperature in April: 55.8°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in April: 38.8°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).
Average pressure in April
West Lake Sammamish, 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
West Lake Sammamish, WA
- Average wind speed in April: 4.3mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in April
West Lake Sammamish, WA
- Average humidity in April: 80%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is July (70%).
Average rainfall in April
West Lake Sammamish, WA
- Average rainfall in April: 1.22"
The wettest month (with the highest rainfall) is December (1.85").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days in April
West Lake Sammamish, WA
- Average rainfall days in April: 14 days
The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in April
West Lake Sammamish, WA
- Average snowfall in April: 0.12"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
West Lake Sammamish, WA
- Average snowfall days in April: 0.4 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in April /
Average sunshine in April
West Lake Sammamish, 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 5min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).
Average sunshine days in April
West Lake Sammamish, WA
- Average sunshine days in April: 13.9 days
The month with the most sunshine days is August (24 days).
The month with the least sunshine days is November (13.5 days).
Average UV index in April
West Lake Sammamish, WA
- Average UV index in April: 3
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 April
West Lake Sammamish, WA
- Average cloud cover in April: 52
The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in April
West Lake Sammamish, WA
- Average visibility in April: 5mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (5mi).
West Lake Sammamish, Washington, USA
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