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
August is the warmest month, with the temperature often reaching an average high of 81.7°F (27.6°C) and an average low of 54.5°F (12.5°C).Heat index
The heat index for August is appraised at 84.2°F (29°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Heat index evaluations are typically in the context of light winds and shaded environments. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
The least humid month in Lake Oswego is August, with an average relative humidity of 63%.Rainfall
In Lake Oswego, Oregon, in August, during 5 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. In Lake Oswego, during the entire year, the rain falls for 172.2 days and collects up to 31.3" (795mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Lake Oswego, the average length of the day in August is 14h and 2min.On the first day of the month, sunrise is at 5:55 am and sunset at 8:38 pm. On the last day of August, in Lake Oswego, sunrise is at 6:32 am and sunset at 7:49 pm PDT.
Sunshine
August has the most sunshine of the year, with an average of 11h of sunshine.UV index
In August, the average daily maximum UV index in Lake Oswego is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In August, the UV index of 5 transforms into the following advice:
Ensure safety - Imperative it is to shield skin and eyes from damage. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What is the hottest time of year in Lake Oswego?
What is the average August temperature in Lake Oswego?
What is the least humid month in Lake Oswego?
What is the average humidity in August in Lake Oswego?
How many days does it rain in August in Lake Oswego?
When it does not snow in Lake Oswego?
What is the average length of the day in August in Lake Oswego?
When are sunrise and sunset in August in Lake Oswego?
What month has the most sunshine in Lake Oswego?
How long on average sun shines in August in Lake Oswego?
How high is the UV index in August in Lake Oswego?
Average temperature in August
Lake Oswego, OR
- Average high temperature in August: 81.7°F
The warmest month (with the highest average high temperature) is August (81.7°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in August: 54.5°F
The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).
Average pressure in August
Lake Oswego, OR
- Average pressure in August: 30"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in August
Lake Oswego, OR
- Average wind speed in August: 3.7mph
The windiest month (with the highest average wind speed) is January (6mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in August
Lake Oswego, OR
- Average humidity in August: 63%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall in August
Lake Oswego, OR
- Average rainfall in August: 0.35"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in August
Lake Oswego, OR
- Average rainfall days in August: 5 days
The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is July (4.8 days).
Average snowfall in August
Lake Oswego, OR
- Average snowfall in August: 0"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Lake Oswego, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (2.3 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
Lake Oswego, OR
- Average daylight in August: 14h and 0min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in August: 11h and 0min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in August
Lake Oswego, OR
- Average sunshine days in August: 23.8 days
The month with the most sunshine days is July (23.9 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in August
Lake Oswego, 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
Lake Oswego, OR
- Average cloud cover in August: 22
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in August
Lake Oswego, OR
- Average visibility in August: 6mi
The months with the highest visibility are July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, May, June, November and December (5mi).
Lake Oswego, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location