April weather forecastSammamish, WA
April
Weather in April
As the community transitions from winter to spring, April showcases moderate increase in temperatures as compared to March. The city witnesses no snowfall during this month, signalling the complete retreat of winter. Humidity makes a noticeable dip to 80% from the beginning of the year, marking a decrease in moisture levels in the atmosphere. Climatic conditions of April align well with outdoor activities owing to increased sunshine hours. Furthermore, the rise in UV index to 3 adds a layer of vibrancy and warmth to the city's atmosphere.Temperature
The commencement of April sees a minor shift in the average high-temperature, moving from a cool 50°F (10°C) in March to a mild 55.8°F (13.2°C). Sammamish sees an average low-temperature of 38.8°F (3.8°C) during April.Humidity
In Sammamish, the average relative humidity in April is 80%.Rainfall
In Sammamish, in April, it is raining for 14 days, with typically 1.22" (31mm) of accumulated precipitation. In Sammamish, during the entire year, the rain falls for 136.7 days and collects up to 13.39" (340mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. April is the last month it regularly snows. During 0.4 snowfall days, in April, 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
The average length of the day in April is 13h and 41min.On the first day of April, sunrise is at 6:44 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 8:19 pm PDT.
Sunshine
In April, the average sunshine is 7.9h.UV index
In April, the average daily maximum UV index in Sammamish is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high UV index of 3 in April translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
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
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
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
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
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
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
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
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
Sammamish, WA
- Average daylight in April: 13h and 42min
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 54min
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
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
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
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
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).
