August weather forecastGrangeville, ID
August
Weather in August
As August starts in Grangeville, the scorching hot July gives way to somewhat cooler, yet still warm, weather conditions. Despite the slight dip in the temperature, the city witnesses a maximum temperature of 82.6°F (28.1°C). It's not surprising to see locals and tourists continuing to indulge in various water sports and picnics. With the sun still shining brightly for most of the day, Summer's farewell still feels warm and radiant. As the summer draws to a close, residents can anticipate more agreeable weather on the horizon.Temperature
August, with its high-temperature average of 82.6°F (28.1°C) and a low-temperature average of 53.2°F (11.8°C), is the warmest month.Heat index
For August, the heat index is appraised at 82.4°F (28°C). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.Heat index guidelines indicate values are for light wind scenarios and shaded regions. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
With an average relative humidity of 47%, August is the least humid month.Rainfall
In Grangeville, Idaho, in August, during 6.8 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, there are 146.2 rainfall days, and 23.35" (593mm) of precipitation is accumulated.Snowfall
In Grangeville, snow does not fall in June through August.Daylight
In Grangeville, the average length of the day in August is 14h and 5min.On the first day of August, sunrise is at 5:28 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 7:23 pm PDT.
Sunshine
With an average of 11.9h of sunshine, August has the most sunshine of the year.UV index
The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 5 in August leads to these recommendations:
Act with care - The need to guard against sun damage is communicated. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Grangeville, ID
- Average high temperature in August: 82.6°F
The warmest month (with the highest average high temperature) is August (82.6°F).
The month with the lowest average high temperature is December (33.6°F).
- Average low temperature in August: 53.2°F
The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (21.7°F).
Average pressure in August
Grangeville, ID
- Average pressure in August: 29.94"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are June and August (29.94"Hg).
Average wind speed in August
Grangeville, ID
- Average wind speed in August: 3.8mph
The windiest months (with the highest average wind speed) are January and November (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in August
Grangeville, ID
- Average humidity in August: 47%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (47%).
Average rainfall in August
Grangeville, ID
- Average rainfall in August: 0.63"
The wettest month (with the highest rainfall) is April (2.91").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days in August
Grangeville, ID
- Average rainfall days in August: 6.8 days
The month with the highest number of rainy days is April (19.3 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in August
Grangeville, ID
- Average snowfall in August: 0"
The month with the highest snowfall is February (12.95").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
Grangeville, ID
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Grangeville, ID
- Average daylight in August: 14h and 6min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in August: 11h and 54min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in August
Grangeville, ID
- Average sunshine days in August: 22.2 days
The month with the most sunshine days is August (22.2 days).
The month with the least sunshine days is March (7.5 days).
Average UV index in August
Grangeville, ID
- Average UV index in August: 5
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
Grangeville, ID
- Average cloud cover in August: 13
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in August
Grangeville, ID
- Average visibility in August: 6mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
