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
In April, the average high-temperature increases from a chilly 46°F (7.8°C) in March to a moderate 57°F (13.9°C). Throughout April, the temperature falls to an average low of 37.9°F (3.3°C).Humidity
In Hartline, the average relative humidity in April is 59%.Rainfall
In Hartline, Washington, in April, during 11.1 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, there are 102.1 rainfall days, and 9.65" (245mm) of precipitation is accumulated.Snowfall
January through April, September through December are months with snowfall in Hartline. April is the last month it regularly snows in Hartline. During 0.8 snowfall days, in April, Hartline aggregates 0.39" (10mm) of snow. Throughout the year, in Hartline, there are 33.4 snowfall days, and 14.65" (372mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 41min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:27 pm. On the last day of April, in Hartline, Washington, sunrise is at 5:39 am and sunset at 8:08 pm PDT.
Sunshine
In April, the average sunshine is 10.1h.UV index
The average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In April, a daily UV index of 4 turns into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What are April temperatures in Hartline?
What is the average humidity in April in Hartline?
How many days does it rain in April in Hartline?
What is the last month it snows in Hartline?
How many hours of daylight does Hartline have in April?
What time are sunrise and sunset in April in Hartline?
How long on average sun shines in April in Hartline?
What is the UV index intensity in April in Hartline?
Average temperature in April
Hartline, WA
- Average high temperature in April: 57°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is December (31.6°F).
- Average low temperature in April: 37.9°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 (21.4°F).
Average pressure in April
Hartline, WA
- Average pressure in April: 29.98"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in April
Hartline, WA
- Average wind speed in April: 7mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).
Average humidity in April
Hartline, WA
- Average humidity in April: 59%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (36%).
Average rainfall in April
Hartline, WA
- Average rainfall in April: 0.79"
The wettest months (with the highest rainfall) are May and December (1.18").
The driest months (with the least rainfall) are July and August (0.2").
Average rainfall days in April
Hartline, WA
- Average rainfall days in April: 11.1 days
The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (3.2 days).
Average snowfall in April
Hartline, WA
- Average snowfall in April: 0.39"
The month with the highest snowfall is January (4.41").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in April
Hartline, WA
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is December (10.5 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Hartline, WA
- Average daylight in April: 13h and 4min
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: 10h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in April
Hartline, WA
- Average sunshine days in April: 15.8 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is March (14.7 days).
Average UV index in April
Hartline, WA
- Average UV index in April: 4
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in April
Hartline, WA
- Average cloud cover in April: 33
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in April
Hartline, WA
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
Hartline, Washington, USA
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