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 onset of August brings with it an average high-temperature of a still warm 83.3°F (28.5°C), showing a negligible variation from the month before. Grass Valley, during the nights of August, registers a substantial plunge from the daytime high, averaging at a moderate 57.9°F (14.4°C).Heat index
The heat index value during August is computed to be 84.2°F (29°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.The heat index's values are generally associated with conditions in shade and light breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Humidity
The least humid month in Grass Valley, Oregon, is August, with an average relative humidity of 46%.Rainfall
In August, in Grass Valley, the rain falls for 3.1 days. Throughout August, 0.28" (7mm) of precipitation is accumulated. Throughout the year, in Grass Valley, there are 112.2 rainfall days, and 10.91" (277mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In August, the average length of the day is 14h and 2min.On the first day of the month, sunrise is at 5:48 am and sunset at 8:30 pm. On the last day of August, sunrise is at 6:24 am and sunset at 7:41 pm PDT.
Sunshine
July and August, with an average of 12h of sunshine, are months with the most sunshine in Grass Valley.UV index
In Grass Valley, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In August, the maximum UV index of 5 translates into these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
How hot is August in Grass Valley?
What is the least humid month in Grass Valley?
What is the average humidity in August in Grass Valley?
How many days does it rain in August in Grass Valley?
When it does not snow in Grass Valley?
What is the average length of the day in August in Grass Valley?
What time are sunrise and sunset in August in Grass Valley?
What is the month with the most sunshine in Grass Valley?
How long on average sun shines in August in Grass Valley?
What is the UV index reading in August in Grass Valley?
Average temperature in August
Grass Valley, OR
- Average high temperature in August: 83.3°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (37.4°F).
- Average low temperature in August: 57.9°F
The month with the highest average low temperature is August (57.9°F).
The coldest month (with the lowest average low temperature) is December (27°F).
Average pressure in August
Grass Valley, OR
- Average pressure in August: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.95"Hg).
Average wind speed in August
Grass Valley, OR
- Average wind speed in August: 6.7mph
The windiest month (with the highest average wind speed) is June (7.9mph).
The calmest months (with the lowest average wind speed) are January and December (5mph).
Average humidity in August
Grass Valley, OR
- Average humidity in August: 46%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (46%).
Average rainfall in August
Grass Valley, OR
- Average rainfall in August: 0.28"
The wettest month (with the highest rainfall) is January (1.93").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in August
Grass Valley, OR
- Average rainfall days in August: 3.1 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is July (2.9 days).
Average snowfall in August
Grass Valley, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Grass Valley, OR
- Average snowfall days in August: 0 days
The months with the highest number of snowfall days are February and December (3.9 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
Grass Valley, 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: 12h
The months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is January (Average sunshine: 5h).
Average sunshine days in August
Grass Valley, OR
- Average sunshine days in August: 25.8 days
The month with the most sunshine days is July (27 days).
The month with the least sunshine days is February (12.3 days).
Average UV index in August
Grass Valley, 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
Grass Valley, OR
- Average cloud cover in August: 9
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in August
Grass Valley, OR
- Average visibility in August: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Grass Valley, Oregon, USA
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