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
Observing a slight rise in April, the average high-temperature shifts from March's chilly 44.8°F (7.1°C) to a cool 52.2°F (11.2°C). Riley's nighttime temperature during April is consistently averaged at a cold 34.3°F (1.3°C).Humidity
In April, the average relative humidity is 60%.Rainfall
In Riley, in April, it is raining for 14.4 days, with typically 1.3" (33mm) of accumulated precipitation. Throughout the year, there are 125.1 rainfall days, and 11.26" (286mm) of precipitation is accumulated.Snowfall
In Riley, snow does not fall in April through October.Daylight
In April, the average length of the day is 13h and 28min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:25 pm. On the last day of April, in Riley, sunrise is at 5:50 am and sunset at 7:59 pm PDT.
Sunshine
In Riley, the average sunshine in April is 10.1h.UV index
The average daily maximum UV index in April in Riley, Oregon, is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 3 in April leads to these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the average April temperature in Riley?
What is the average humidity in April in Riley?
How much does it rain in Riley in April?
When it does not snow in Riley?
Does it snow in Riley in April?
How many hours of daylight does Riley have in April?
When is the sunrise / sunset in April in Riley?
How many hours of sunshine does Riley have in April?
How high is the UV index in April in Riley?
Average temperature in April
Riley, OR
- Average high temperature in April: 52.2°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (33.1°F).
- Average low temperature in April: 34.3°F
The month with the highest average low temperature is August (58.1°F).
The coldest month (with the lowest average low temperature) is December (21.2°F).
Average pressure in April
Riley, OR
- Average pressure in April: 30.02"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in April
Riley, OR
- Average wind speed in April: 9.9mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).
Average humidity in April
Riley, OR
- Average humidity in April: 60%
The month with the highest relative humidity is December (83%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall in April
Riley, OR
- Average rainfall in April: 1.3"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in April
Riley, OR
- Average rainfall days in April: 14.4 days
The month with the highest number of rainy days is March (17.7 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in April
Riley, OR
- Average snowfall in April: 0"
The month with the highest snowfall is December (0.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Riley, OR
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is December (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Riley, 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: 10h and 1min
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
Riley, OR
- Average sunshine days in April: 13.3 days
The months with the most sunshine days are July and August (25.3 days).
The month with the least sunshine days is March (11.5 days).
Average UV index in April
Riley, OR
- Average UV index in April: 3
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in April
Riley, OR
- Average cloud cover in April: 35
The month with the most cloud cover is December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in April
Riley, OR
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Riley, Oregon, USA
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