Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
Entering April, Saint Helens notices a subtle temperature elevation, with the average high-temperature advancing from March's chilly 48.7°F (9.3°C) to a fresh 54.3°F (12.4°C). In Saint Helens, April nights witness a steady temperature drop to a wintry 36.1°F (2.3°C).Humidity
The average relative humidity in April is 83%.Rainfall
In Saint Helens, in April, during 15.8 rainfall days, 1.77" (45mm) of precipitation is typically 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, Oregon. During 0.5 snowfall days, in April, Saint Helens aggregates 0.08" (2mm) of snow. In Saint Helens, Oregon, during the entire year, snow falls for 10.2 days and aggregates up to 5.91" (150mm) of snow.Daylight
In Saint Helens, the average length of the day in April is 13h and 35min.On the first day of April, 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 is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 3 during April leads to these advisories:
Ensure safety - Recommendations to avert sunburn are presented. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What are the temperatures in Saint Helens in April?
What is the average humidity in April in Saint Helens?
How many days does it rain in April in Saint Helens?
What is the last month it snows in Saint Helens?
How many hours of daylight does Saint Helens have in April?
When is the sunrise / sunset in April in Saint Helens?
How many hours of sunshine does Saint Helens have in April?
How high is the UV index in April in Saint Helens?
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 4min
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 3min
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).
Saint Helens, Oregon, USA
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