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
Sisters's average high-temperature in August is a still warm 78.4°F (25.8°C), marking an insignificant difference from the 78.8°F (26°C) of July. The month of August sees a significant daily temperature drop, recording an average low-temperature of 50.7°F (10.4°C).Humidity
July and August, with an average relative humidity of 53%, are the least humid months in Sisters.Rainfall
In Sisters, in August, it is raining for 6.1 days, with typically 0.51" (13mm) of accumulated precipitation. In Sisters, during the entire year, the rain falls for 142.1 days and collects up to 22.87" (581mm) of precipitation.Snowfall
June through August are months without snowfall in Sisters.Daylight
In August, the average length of the day in Sisters is 13h and 58min.On the first day of August in Sisters, sunrise is at 5:54 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:43 pm PDT.
Sunshine
The average sunshine in August is 11.8h.UV index
The average daily maximum UV index in August in Sisters is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In August, an average UV index of 4 transforms into the following instructions:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Frequently asked questions
What are the temperatures in Sisters in August?
What are the least humid months in Sisters?
What is the average humidity in August in Sisters?
How much does it rain in Sisters in August?
When it does not snow in Sisters?
Does it snow in Sisters in August?
How many hours of daylight does Sisters have in August?
When are sunrise and sunset in August in Sisters?
How long on average sun shines in August in Sisters?
What is the UV index reading in August in Sisters?
Average temperature in August
Sisters, OR
- Average high temperature in August: 78.4°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in August: 50.7°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is December (24.8°F).
Average pressure in August
Sisters, OR
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in August
Sisters, OR
- Average wind speed in August: 4.8mph
The windiest month (with the highest average wind speed) is February (6.1mph).
The calmest months (with the lowest average wind speed) are August and September (4.8mph).
Average humidity in August
Sisters, OR
- Average humidity in August: 53%
The month with the highest relative humidity is December (84%).
The months with the lowest relative humidity are July and August (53%).
Average rainfall in August
Sisters, OR
- Average rainfall in August: 0.51"
The wettest month (with the highest rainfall) is January (3.31").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in August
Sisters, OR
- Average rainfall days in August: 6.1 days
The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is July (5 days).
Average snowfall in August
Sisters, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (13.74").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
Sisters, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (14.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Sisters, 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 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in August
Sisters, OR
- Average sunshine days in August: 21.8 days
The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is March (8.1 days).
Average UV index in August
Sisters, OR
- Average UV index in August: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in August
Sisters, OR
- Average cloud cover in August: 12
The months with the most cloud cover are January, February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in August
Sisters, OR
- Average visibility in August: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Sisters, Oregon, USA
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