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
The shift from March to April sees a slight increase in the average high-temperature, transitioning from a cool 51.1°F (10.6°C) to a mild 59.5°F (15.3°C). In Harper, the expected average low-temperature for April is a wintry 39.6°F (4.2°C).Humidity
In April, the average relative humidity in Harper is 52%.Rainfall
In Harper, in April, it is raining for 7 days, with typically 0.24" (6mm) of accumulated precipitation. In Harper, during the entire year, the rain falls for 57 days and collects up to 2.99" (76mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Harper. April is the last month it regularly snows. During 0.3 snowfall days, in April, Harper aggregates 0.08" (2mm) of snow. In Harper, Oregon, during the entire year, snow falls for 17.3 days and aggregates up to 4.21" (107mm) of snow.Daylight
In April, the average length of the day is 13h and 29min.On the first day of April, sunrise is at 7:30 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 8:52 pm MDT.
Sunshine
In April, the average sunshine is 9.5h.UV index
In Harper, the average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: During April, 4 as the daily maximum UV index converts into the following advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the average April temperature in Harper?
What is the average humidity in April in Harper?
How much does it rain in Harper in April?
What is the last month it snows in Harper?
What is the average length of the day in April in Harper?
What time are sunrise and sunset in April in Harper?
How many hours of sunshine does Harper have in April?
What is the UV index reading in April in Harper?
Average temperature in April
Harper, OR
- Average high temperature in April: 59.5°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (34.3°F).
- Average low temperature in April: 39.6°F
The month with the highest average low temperature is August (63.5°F).
The coldest months (with the lowest average low temperature) are January and December (22.1°F).
Average pressure in April
Harper, OR
- Average pressure in April: 30"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in April
Harper, OR
- Average wind speed in April: 7.1mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is January (3.9mph).
Average humidity in April
Harper, OR
- Average humidity in April: 52%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (28%).
Average rainfall in April
Harper, OR
- Average rainfall in April: 0.24"
The wettest months (with the highest rainfall) are March and May (0.39").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in April
Harper, OR
- Average rainfall days in April: 7 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (2.3 days).
Average snowfall in April
Harper, OR
- Average snowfall in April: 0.08"
The month with the highest snowfall is December (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Harper, OR
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is December (6.1 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
Harper, OR
- Average daylight in April: 13h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in April: 9h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in April
Harper, OR
- Average sunshine days in April: 21.6 days
The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (20.1 days).
Average UV index in April
Harper, OR
- Average UV index in April: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Harper, OR
- Average cloud cover in April: 30
The months with the most cloud cover are January and December (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in April
Harper, OR
- 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, February and December (5mi).
Harper, Oregon, USA
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