April weather forecastNapavine, WA
April
Weather in April
April is a moderate spring month in Napavine, Washington, with an average temperature varying between 36.9°F (2.7°C) and 56.1°F (13.4°C).Temperature
April signifies a subtle uplift in the average high-temperature, adjusting from a cool 50.5°F (10.3°C) in March to a mild 56.1°F (13.4°C). The nights of April anticipate an average low-temperature of 36.9°F (2.7°C).Humidity
The average relative humidity in April is 83%.Rainfall
In Napavine, in April, it is raining for 19 days, with typically 2.91" (74mm) of accumulated precipitation. Throughout the year, there are 185.5 rainfall days, and 36.1" (917mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Napavine, the average length of the day in April is 13h and 37min.On the first day of April, sunrise is at 6:49 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 5:57 am and sunset at 8:20 pm PDT.
Sunshine
In April, the average sunshine is 6.8h.UV index
The average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 3 during April translates into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Napavine, WA
- Average high temperature in April: 56.1°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in April: 36.9°F
The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure in April
Napavine, WA
- Average pressure in April: 30.06"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 (30.02"Hg).
Average wind speed in April
Napavine, WA
- Average wind speed in April: 4.3mph
The windiest months (with the highest average wind speed) are January, March and November (4.5mph).
The calmest month (with the lowest average wind speed) is September (3.6mph).
Average humidity in April
Napavine, WA
- Average humidity in April: 83%
The months with the highest relative humidity are January, February, November and December (89%).
The month with the lowest relative humidity is July (73%).
Average rainfall in April
Napavine, WA
- Average rainfall in April: 2.91"
The wettest month (with the highest rainfall) is January (5.51").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days in April
Napavine, WA
- Average rainfall days in April: 19 days
The month with the highest number of rainy days is March (21.5 days).
The month with the least rainy days is August (6.4 days).
Average snowfall in April
Napavine, WA
- Average snowfall in April: 0"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Napavine, WA
- Average snowfall days in April: 0.1 days
The month with the highest number of snowfall days is February (3.5 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
Napavine, 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: 6h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in April
Napavine, WA
- Average sunshine days in April: 9.7 days
The months with the most sunshine days are July and August (20.8 days).
The month with the least sunshine days is February (7.6 days).
Average UV index in April
Napavine, WA
- Average UV index in April: 3
The month with the highest UV index is 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
Napavine, WA
- Average cloud cover in April: 60
The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in April
Napavine, WA
- Average visibility in April: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
