April weather forecastOlalla, WA
April
Weather in April
April in Olalla, Washington, is a mild spring month, with an average temperature fluctuating between 39.9°F (4.4°C) and 56.7°F (13.7°C).Temperature
The beginning of April marks a minor shift in the average high-temperature, moving from March's cool 50.9°F (10.5°C) to a refreshing 56.7°F (13.7°C). Throughout the month of April, Olalla observes an average nighttime temperature of 39.9°F (4.4°C).Humidity
In April, the average relative humidity is 79%.Rainfall
In Olalla, in April, it is raining for 13.3 days, with typically 0.79" (20mm) of accumulated precipitation. In Olalla, during the entire year, the rain falls for 138.9 days and collects up to 12.24" (311mm) of precipitation.Snowfall
In Olalla, Washington, snow does not fall in April through October.Ocean temperature
In April, the average ocean temperature in Olalla is 46°F (7.8°C).Note: It is life-risking to swim in 46°F (7.8°C). Briefly staying in 55.4°F (13°C) waters feels unsettling, and temperatures below 50°F (10°C) might result in cold shock and loss of breath control, hinging on personal endurance.
Daylight
In April, the average length of the day is 13h and 40min.On the first day of the month, sunrise is at 6:46 am and sunset at 7:40 pm. On the last day of April, sunrise is at 5:53 am and sunset at 8:21 pm PDT.
Sunshine
In April, the average sunshine is 8.1h.UV index
In April, the average daily maximum UV index in Olalla is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 4 during April leads to these instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. Direct Sun exposure should be minimized especially during midday when radiation is most intense. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Olalla, WA
- Average high temperature in April: 56.7°F
The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (43.2°F).
- Average low temperature in April: 39.9°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.9°F).
Average pressure in April
Olalla, WA
- Average pressure in April: 30.05"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 (30.01"Hg).
Average wind speed in April
Olalla, WA
- Average wind speed in April: 5mph
The windiest month (with the highest average wind speed) is March (5.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity in April
Olalla, WA
- Average humidity in April: 79%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is July (69%).
Average rainfall in April
Olalla, WA
- Average rainfall in April: 0.79"
The wettest months (with the highest rainfall) are January and December (2.05").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in April
Olalla, WA
- Average rainfall days in April: 13.3 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in April
Olalla, WA
- Average snowfall in April: 0"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Olalla, WA
- Average snowfall days in April: 0.1 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in April
Olalla, WA
- Average sea temperature in April: 46.1°F
The best month for swimming (with the highest average sea temperature) is August (53.3°F).
The coldest month (with the lowest average sea temperature) is February (45.8°F).
Average daylight in April /
Average sunshine in April
Olalla, WA
- Average daylight in April: 13h and 42min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in April: 8h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in April
Olalla, WA
- Average sunshine days in April: 13.8 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in April
Olalla, WA
- Average UV index in April: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Olalla, WA
- Average cloud cover in April: 50
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in April
Olalla, 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, March, April, October, November and December (5mi).
