August weather forecastOntario, OR
August
Weather in August
The last month of the summer, August, is another tropical month in Ontario, Oregon, with an average temperature varying between 91.9°F (33.3°C) and 62.1°F (16.7°C).Temperature
Ontario indicates an average high-temperature of a still tropical 91.9°F (33.3°C) in August, showing minor variation from July's 93.2°F (34°C). Ontario records a marked divergence from the day's high temperatures, with nights in August averaging at a refreshing 62.1°F (16.7°C).Humidity
The least humid month is August, with an average relative humidity of 29%.Rainfall
In Ontario, in August, it is raining for 1.8 days, with typically 0.12" (3mm) of accumulated precipitation. In Ontario, during the entire year, the rain falls for 84.9 days and collects up to 9.29" (236mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in August is 13h and 57min.On the first day of the month, sunrise is at 6:36 am and sunset at 9:11 pm. On the last day of August, sunrise is at 7:10 am and sunset at 8:24 pm MDT.
Sunshine
In Ontario, the average sunshine in August is 11.2h.UV index
In Ontario, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 6 in August transforms into this advice:
Shun overexposure. Protection from sun ravages is indispensable. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Ontario, OR
- Average high temperature in August: 91.9°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 August: 62.1°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 August
Ontario, OR
- Average pressure in August: 29.92"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 August
Ontario, OR
- Average wind speed in August: 5.3mph
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 August
Ontario, OR
- Average humidity in August: 29%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (29%).
Average rainfall in August
Ontario, OR
- Average rainfall in August: 0.12"
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 August
Ontario, OR
- Average rainfall days in August: 1.8 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 August
Ontario, OR
- Average snowfall in August: 0"
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 August
Ontario, OR
- Average snowfall days in August: 0 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 August /
Average sunshine in August
Ontario, OR
- Average daylight in August: 13h and 54min
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 August: 11h and 12min
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 August
Ontario, OR
- Average sunshine days in August: 27.3 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 August
Ontario, OR
- Average UV index in August: 6
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 August
Ontario, OR
- Average cloud cover in August: 9
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 August
Ontario, OR
- Average visibility in August: 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).
