April weather forecastOntario, OR
April
Weather in April
April in Ontario, Oregon, is a refreshing spring month, with an average temperature fluctuating between 40.3°F (4.6°C) and 62.2°F (16.8°C).Temperature
In Ontario, stepping into April brings a temperature increase, moving up from March's cool 53.2°F (11.8°C) to a refreshing 62.2°F (16.8°C). Despite drastic daytime highs, Ontario logs an average low-temperature reading of 40.3°F (4.6°C) throughout April.Humidity
In Ontario, the average relative humidity in April is 52%.Rainfall
In Ontario, during April, the rain falls for 9.7 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 84.9 rainfall days, and 9.29" (236mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. April is the last month it regularly snows. During 0.1 snowfall days, in April, Ontario aggregates 0.12" (3mm) of snow. Throughout the year, there are 21.8 snowfall days, and 12.56" (319mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 29min.On the first day of the month, sunrise is at 7:27 am and sunset at 8:15 pm. On the last day of April, sunrise is at 6:39 am and sunset at 8:50 pm MDT.
Sunshine
In Ontario, the average sunshine in April is 9.6h.UV index
In April, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In April, a daily UV index of 4 turns into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Ontario, OR
- Average high temperature in April: 62.2°F
The warmest month (with the highest average high temperature) is July (93.2°F).
The months with the lowest average high temperature are January and December (36.1°F).
- Average low temperature in April: 40.3°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (23°F).
Average pressure in April
Ontario, OR
- Average pressure in April: 30"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in April
Ontario, OR
- Average wind speed in April: 6.5mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is January (3.9mph).
Average humidity in April
Ontario, OR
- Average humidity in April: 52%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (29%).
Average rainfall in April
Ontario, OR
- Average rainfall in April: 0.71"
The wettest month (with the highest rainfall) is December (1.57").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in April
Ontario, OR
- Average rainfall days in April: 9.7 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is August (1.8 days).
Average snowfall in April
Ontario, OR
- Average snowfall in April: 0.12"
The month with the highest snowfall is December (5.35").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Ontario, OR
- Average snowfall days in April: 0.1 days
The month with the highest number of snowfall days is December (7.4 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
Ontario, OR
- Average daylight in April: 13h and 30min
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 36min
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 6min).
Average sunshine days in April
Ontario, OR
- Average sunshine days in April: 18.8 days
The month with the most sunshine days is July (27.7 days).
The month with the least sunshine days is February (15.2 days).
Average UV index in April
Ontario, 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
Ontario, OR
- Average cloud cover in April: 30
The months with the most cloud cover are January and December (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in April
Ontario, OR
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
