April weather forecastSaint John, WA
April
Weather in April
April is a moderate spring month in Saint John, Washington, with an average temperature ranging between min 37.4°F (3°C) and max 55.9°F (13.3°C).Temperature
With the onset of April, Saint John's average high-temperature experiences a rise, moving from March's frosty 46.9°F (8.3°C) to a moderate 55.9°F (13.3°C). The nights of April anticipate an average low-temperature of 37.4°F (3°C).Humidity
The average relative humidity in April is 66%.Rainfall
In Saint John, during April, the rain falls for 9.5 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, there are 84.3 rainfall days, and 7.24" (184mm) of precipitation is accumulated.Snowfall
January through May, September, November and December are months with snowfall. In Saint John, in April, during 1.6 snowfall days, 0.71" (18mm) of snow is typically accumulated. Throughout the year, there are 32.5 snowfall days, and 14.09" (358mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 39min.On the first day of April, sunrise is at 6:27 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 8:00 pm PDT.
Sunshine
The average sunshine in April is 9.5h.UV index
In April, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 3 in April transforms into the following instructions:
Exercise prevention - Precautions against solar damage are endorsed. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Saint John, WA
- Average high temperature in April: 55.9°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (33.1°F).
- Average low temperature in April: 37.4°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in April
Saint John, WA
- Average pressure in April: 29.99"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in April
Saint John, WA
- Average wind speed in April: 8.6mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in April
Saint John, WA
- Average humidity in April: 66%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (36%).
Average rainfall in April
Saint John, WA
- Average rainfall in April: 0.63"
The wettest months (with the highest rainfall) are January and May (0.91").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in April
Saint John, WA
- Average rainfall days in April: 9.5 days
The month with the highest number of rainy days is March (10.1 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in April
Saint John, WA
- Average snowfall in April: 0.71"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and October (0").
Average snowfall days in April
Saint John, WA
- Average snowfall days in April: 1.6 days
The month with the highest number of snowfall days is December (9.3 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in April /
Average sunshine in April
Saint John, WA
- Average daylight in April: 13h and 36min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in April: 9h and 30min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in April
Saint John, WA
- Average sunshine days in April: 18.1 days
The month with the most sunshine days is July (26.6 days).
The month with the least sunshine days is February (15.9 days).
Average UV index in April
Saint John, WA
- Average UV index in April: 3
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Saint John, WA
- Average cloud cover in April: 39
The months with the most cloud cover are January and December (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in April
Saint John, WA
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
