April weather forecastMountain Brook, WA
April
Weather in April
April in Mountain Brook, Washington, is a cool spring month, with an average temperature ranging between max 52.5°F (11.4°C) and min 35.2°F (1.8°C).Temperature
Mountain Brook observes a slight ascent in average high-temperatures during April, adjusting from a frosty 44.1°F (6.7°C) in March to a fresh 52.5°F (11.4°C). In the month of April, the nighttime temperature dips to a steady average of 35.2°F (1.8°C).Humidity
In April, the average relative humidity is 76%.Rainfall
In April, in Mountain Brook, the rain falls for 16 days. Throughout April, 1.89" (48mm) of precipitation is accumulated. Throughout the year, in Mountain Brook, there are 152.5 rainfall days, and 26.93" (684mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. April is the last month it regularly snows in Mountain Brook. During 0.8 snowfall days, in April, Mountain Brook aggregates 0.16" (4mm) of snow. In Mountain Brook, Washington, during the entire year, snow falls for 23.9 days and aggregates up to 18.74" (476mm) of snow.Daylight
In April, the average length of the day is 13h and 35min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:34 pm. On the last day of April, sunrise is at 5:53 am and sunset at 8:12 pm PDT.
Sunshine
In April, the average sunshine is 8.6h.UV index
In Mountain Brook, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 3 during April translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Mountain Brook, WA
- Average high temperature in April: 52.5°F
The warmest month (with the highest average high temperature) is August (78.6°F).
The month with the lowest average high temperature is December (35.2°F).
- Average low temperature in April: 35.2°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (26.1°F).
Average pressure in April
Mountain Brook, WA
- Average pressure in April: 30.04"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).
Average wind speed in April
Mountain Brook, WA
- Average wind speed in April: 6.1mph
The windiest month (with the highest average wind speed) is June (6.4mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).
Average humidity in April
Mountain Brook, WA
- Average humidity in April: 76%
The months with the highest relative humidity are January, February and December (88%).
The months with the lowest relative humidity are July and August (58%).
Average rainfall in April
Mountain Brook, WA
- Average rainfall in April: 1.89"
The wettest month (with the highest rainfall) is January (4.88").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in April
Mountain Brook, WA
- Average rainfall days in April: 16 days
The month with the highest number of rainy days is March (19.4 days).
The month with the least rainy days is August (3.8 days).
Average snowfall in April
Mountain Brook, WA
- Average snowfall in April: 0.16"
The month with the highest snowfall is January (6.22").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Mountain Brook, WA
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is December (6.5 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
Mountain Brook, WA
- Average daylight in April: 13h and 36min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in April: 8h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in April
Mountain Brook, WA
- Average sunshine days in April: 12 days
The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in April
Mountain Brook, WA
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in April
Mountain Brook, WA
- Average cloud cover in April: 48
The months with the most cloud cover are January and February (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in April
Mountain Brook, WA
- Average visibility in April: 5mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (4mi).
