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
The shift from July to August is characterized by an average high-temperature of a still moderately hot 81°F (27.2°C), not significantly different from the 81.7°F (27.6°C) of July. John Day undergoes a major shift from daytime highs, averaging a frosty 49.6°F (9.8°C) during the night in August.Heat index
During August, the heat index is computed to be 80.6°F (27°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.Heat index determinations are made taking into account the shade and light air movements. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Humidity
August is the least humid month, with an average relative humidity of 42%.Rainfall
In August, the rain falls for 3.3 days. Throughout August, 0.28" (7mm) of precipitation is accumulated. In John Day, during the entire year, the rain falls for 127.7 days and collects up to 17.09" (434mm) of precipitation.Snowfall
June through August are months without snowfall.Daylight
In August, the average length of the day in John Day is 13h and 58min.On the first day of the month, sunrise is at 5:43 am and sunset at 8:20 pm. On the last day of August, in John Day, sunrise is at 6:18 am and sunset at 7:33 pm PDT.
Sunshine
August has the most sunshine of the year, with an average of 12.1h of sunshine.UV index
The average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In August, the maximum UV index of 5 suggests this advice:
Be vigilant - A duty to shield skin and eyes from injury exists. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
What are the temperatures in John Day in August?
What is the least humid month in John Day?
What is the average humidity in August in John Day?
How much does it rain in John Day in August?
When it does not snow in John Day?
Does it snow in John Day in August?
How many hours of daylight does John Day have in August?
What time are sunrise and sunset in August in John Day?
What month has the most sunshine in John Day?
How many hours of sunshine does John Day have in August?
What is the UV index reading in August in John Day?
Average temperature in August
John Day, OR
- Average high temperature in August: 81°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (33.4°F).
- Average low temperature in August: 49.6°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).
Average pressure in August
John Day, OR
- Average pressure in August: 29.93"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in August
John Day, OR
- Average wind speed in August: 5mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).
Average humidity in August
John Day, OR
- Average humidity in August: 42%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (42%).
Average rainfall in August
John Day, OR
- Average rainfall in August: 0.28"
The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in August
John Day, OR
- Average rainfall days in August: 3.3 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in August
John Day, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (10.31").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
John Day, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
John Day, 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: 12h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in August
John Day, OR
- Average sunshine days in August: 24.8 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is February (9 days).
Average UV index in August
John Day, 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, March, October, November and December (UV index 2).
Average cloud cover in August
John Day, OR
- Average cloud cover in August: 9
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in August
John Day, OR
- Average visibility in August: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
John Day, Oregon, USA
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