Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
In Jefferson, August is the warmest month, with temperatures averaging a high of 81.9°F (27.7°C) and a low of 52.9°F (11.6°C).Heat index
August's mean heat index is estimated at a tropical 86°F (30°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
August is the least humid month in Jefferson, with an average relative humidity of 66%.Rainfall
In Jefferson, Oregon, during August, the rain falls for 3.9 days and regularly aggregates up to 0.39" (10mm) of precipitation. Throughout the year, in Jefferson, there are 164.2 rainfall days, and 26.97" (685mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in August in Jefferson is 14h and 0min.On the first day of the month, sunrise is at 5:59 am and sunset at 8:37 pm. On the last day of August, sunrise is at 6:34 am and sunset at 7:49 pm PDT.
Sunshine
The month with the most sunshine in Jefferson is August, with an average of 11.1h of sunshine.UV index
The average daily maximum UV index in August in Jefferson is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 5 in August interprets into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What is the hottest time of year in Jefferson?
What are the temperatures in Jefferson in August?
What is the least humid month in Jefferson?
What is the average humidity in August in Jefferson?
How much does it rain in Jefferson in August?
When it does not snow in Jefferson?
How many hours of daylight does Jefferson have in August?
When is the sunrise / sunset in August in Jefferson?
What month has the most sunshine in Jefferson?
How many hours of sunshine does Jefferson have in August?
How high is the UV index in August in Jefferson?
Average temperature in August
Jefferson, OR
- Average high temperature in August: 81.9°F
The warmest month (with the highest average high temperature) is August (81.9°F).
The month with the lowest average high temperature is December (45.5°F).
- Average low temperature in August: 52.9°F
The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).
Average pressure in August
Jefferson, OR
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in August
Jefferson, OR
- Average wind speed in August: 4mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in August
Jefferson, OR
- Average humidity in August: 66%
The months with the highest relative humidity are February and December (87%).
The month with the lowest relative humidity is August (66%).
Average rainfall in August
Jefferson, OR
- Average rainfall in August: 0.39"
The wettest month (with the highest rainfall) is December (3.98").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in August
Jefferson, OR
- Average rainfall days in August: 3.9 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is August (3.9 days).
Average snowfall in August
Jefferson, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Jefferson, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Jefferson, OR
- Average daylight in August: 14h and 0min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in August: 11h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in August
Jefferson, OR
- Average sunshine days in August: 24.7 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (9 days).
Average UV index in August
Jefferson, OR
- Average UV index in August: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Jefferson, OR
- Average cloud cover in August: 21
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in August
Jefferson, OR
- Average visibility in August: 6mi
The months with the highest visibility are July, August and September (6mi).
The month with the lowest visibility is February (4mi).
Jefferson, Oregon, USA
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