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
April's arrival coincides with a marginal rise in the average high-temperature, moving from March's fresh 51.1°F (10.6°C) to a moderate 59.5°F (15.3°C). Harper throughout April, records an average low-temperature of 39.6°F (4.2°C).Humidity
In April, the average relative humidity is 52%.Rainfall
In Harper, during April, the rain falls for 7 days and regularly aggregates up to 0.24" (6mm) of precipitation. In Harper, during the entire year, the rain falls for 57 days and collects up to 2.99" (76mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. April is the last month it regularly snows. During 0.3 snowfall days, in April, Harper aggregates 0.08" (2mm) of snow. In Harper, 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
The average daily maximum UV index in April is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 4 in April translates into these instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. To cut down UV radiation exposure by about half, sport a wide-brim hat. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in April?
What is the average humidity in April?
How many days does it rain in April?
What is the last month it snows?
How many hours of daylight does Harper have in April?
When is the sunrise / sunset in April?
How many hours of sunshine does Harper have in April?
What is the UV index reading in April?
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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