April weather forecastMountlake Terrace, WA
April
Weather in April
April, like March, in Mountlake Terrace, Washington, is another fresh spring month, with an average temperature ranging between min 41.5°F (5.3°C) and max 55.2°F (12.9°C).Temperature
Mountlake Terrace's weather in April, with an average high-temperature of a still cool 55.2°F (12.9°C), subtly shifts from March's 50°F (10°C). An average low-temperature of 41.5°F (5.3°C) is recorded during the nights in April in Mountlake Terrace.Humidity
In Mountlake Terrace, the average relative humidity in April is 79%.Rainfall
In Mountlake Terrace, Washington, during April, the rain falls for 17.3 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Mountlake Terrace, during the entire year, the rain falls for 173 days and collects up to 25" (635mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Mountlake Terrace. April is the last month it regularly snows. During 0.4 snowfall days, in April, Mountlake Terrace aggregates 0.08" (2mm) of snow. Throughout the year, in Mountlake Terrace, there are 12.5 snowfall days, and 6.65" (169mm) of snow is accumulated.Daylight
In Mountlake Terrace, Washington, the average length of the day in April is 13h and 41min.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 8:21 pm PDT.
Sunshine
The average sunshine in April in Mountlake Terrace is 8.4h.UV index
In Mountlake Terrace, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 3 during April translates into the following guidance:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Mountlake Terrace, WA
- Average high temperature in April: 55.2°F
The warmest month (with the highest average high temperature) is August (73.9°F).
The month with the lowest average high temperature is December (43.3°F).
- Average low temperature in April: 41.5°F
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (35.8°F).
Average pressure in April
Mountlake Terrace, WA
- Average pressure in April: 30.04"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in April
Mountlake Terrace, WA
- Average wind speed in April: 5.1mph
The windiest month (with the highest average wind speed) is November (5.9mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in April
Mountlake Terrace, WA
- Average humidity in April: 79%
The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is July (72%).
Average rainfall in April
Mountlake Terrace, WA
- Average rainfall in April: 2.01"
The wettest month (with the highest rainfall) is December (3.5").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in April
Mountlake Terrace, WA
- Average rainfall days in April: 17.3 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in April
Mountlake Terrace, WA
- Average snowfall in April: 0.08"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Mountlake Terrace, WA
- Average snowfall days in April: 0.4 days
The month with the highest number of snowfall days is February (4.7 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
Mountlake Terrace, 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: 8h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in April
Mountlake Terrace, WA
- Average sunshine days in April: 9.8 days
The month with the most sunshine days is August (22.5 days).
The month with the least sunshine days is November (9.2 days).
Average UV index in April
Mountlake Terrace, 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
Mountlake Terrace, WA
- Average cloud cover in April: 47
The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in April
Mountlake Terrace, WA
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
