April weather forecastSaint Helens, OR
April
Weather in April
April is a fresh spring month in Saint Helens, Oregon, with an average temperature varying between 36.1°F (2.3°C) and 54.3°F (12.4°C).Temperature
Saint Helens's weather in April shows a minor rise in the average high-temperature, moving slightly up from March's chilly 48.7°F (9.3°C) to a cool 54.3°F (12.4°C). Saint Helens reports a consistent average low-temperature of 36.1°F (2.3°C) throughout April nights.Humidity
The average relative humidity in April is 83%.Rainfall
In April, the rain falls for 15.8 days. Throughout April, 1.77" (45mm) of precipitation is accumulated. In Saint Helens, Oregon, during the entire year, the rain falls for 149 days and collects up to 19.37" (492mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows in Saint Helens. During 0.5 snowfall days, in April, Saint Helens aggregates 0.08" (2mm) of snow. Throughout the year, there are 10.2 snowfall days, and 5.91" (150mm) of snow is accumulated.Daylight
In Saint Helens, the average length of the day in April is 13h and 35min.On the first day of April in Saint Helens, sunrise is at 6:49 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 5:58 am and sunset at 8:18 pm PDT.
Sunshine
The average sunshine in April is 6.5h.UV index
The average daily maximum UV index in April in Saint Helens is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 3 during April translates into these guidelines:
Take necessary precautions - Defending against sun damage is advocated. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Saint Helens, OR
- Average high temperature in April: 54.3°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 (41.9°F).
- Average low temperature in April: 36.1°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (31.8°F).
Average pressure in April
Saint Helens, OR
- Average pressure in April: 30.06"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in April
Saint Helens, OR
- Average wind speed in April: 4.3mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in April
Saint Helens, OR
- Average humidity in April: 83%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are July and August (72%).
Average rainfall in April
Saint Helens, OR
- Average rainfall in April: 1.77"
The wettest month (with the highest rainfall) is January (2.64").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in April
Saint Helens, OR
- Average rainfall days in April: 15.8 days
The month with the highest number of rainy days is March (16 days).
The month with the least rainy days is July (5.9 days).
Average snowfall in April
Saint Helens, OR
- Average snowfall in April: 0.08"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Saint Helens, OR
- Average snowfall days in April: 0.5 days
The month with the highest number of snowfall days is February (3.6 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
Saint Helens, OR
- 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: 6h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 42min).
Average sunshine days in April
Saint Helens, OR
- Average sunshine days in April: 12.3 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is February (12.1 days).
Average UV index in April
Saint Helens, OR
- Average UV index in April: 3
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in April
Saint Helens, OR
- Average cloud cover in April: 60
The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in April
Saint Helens, OR
- Average visibility in April: 4mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
