August weather forecast
Grangeville, ID

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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 in Grangeville still feels warm and radiant. As the summer draws to a close, residents can anticipate more agreeable weather on the horizon.

Temperature

August, characterized by an average high temperature of 82.6°F (28.1°C) and a low temperature of 53.2°F (11.8°C), is generally the warmest month in Grangeville.

Heat index

The heat index for August is computed to be 82.4°F (28°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.
Records show heat index calculations are tailored for shaded regions and mild winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.

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, in Grangeville, 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 August, the average length of the day is 14h and 5min.
On the first day of August in Grangeville, 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

August has the most sunshine of the year, with an average of 11.9h of sunshine.

UV index

The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: An average maximum UV index of 5 in August leads to these recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
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Frequently asked questions

What are the warmest months in Grangeville?

Temperature records mark August as the warmest month, with highs averaging 82.6°F (28.1°C) and lows at 53.2°F (11.8°C).

How hot is it in Grangeville in August?

The high-temperature in Grangeville, Idaho, during August is 82.6°F (28.1°C) and the low-temperature is 53.2°F (11.8°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is computed to be 82.4°F (28°C).

What is the least humid month in Grangeville?

August is the least humid month, with an average relative humidity of 47%.

What is the average humidity in August in Grangeville?

In Grangeville, the average relative humidity in August is 47%.

How many days does it rain in August in Grangeville?

In Grangeville, Idaho, during August, the rain falls for 6.8 days and regularly aggregates up to 0.63" (16mm) of precipitation.

When it does not snow in Grangeville?

In Grangeville, snow does not fall in June through August.

Does it snow in Grangeville in August?

In Grangeville, in August, it doesn't snow. In September, it regularly snows.

How many hours of daylight does Grangeville have in August?

In August, the average day length in Grangeville is 14h and 5min.

When are sunrise and sunset in August in Grangeville?

In August, on the first day of the month, sunrise is at 5:28 am and sunset at 8:13 pm. On the last day of the month, in Grangeville, sunrise is at 6:05 am and sunset at 7:23 pm PDT.

What month has the most sunshine in Grangeville?

The month with the most sunshine in Grangeville, Idaho, is August, with an average of 11.9h of sunshine.

How many hours of sunshine does Grangeville have in August?

In Grangeville, Idaho, the average sunshine duration in August is 11.9h.

What is the UV index reading in August in Grangeville?

In Grangeville, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Grangeville, ID

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).

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Average pressure in August
Grangeville, ID

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).

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Average wind speed in August
Grangeville, ID

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).

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Average humidity in August
Grangeville, ID

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%).

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Average rainfall in August
Grangeville, ID

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").

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Average rainfall days in August
Grangeville, ID

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).

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Average snowfall in August
Grangeville, ID

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").

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Average snowfall days in August
Grangeville, ID

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).

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Average daylight in August /
Average sunshine in August
Grangeville, ID

Average daylight in August / Average sunshine in August - Grangeville, ID
  • Average daylight in August: 14h and 1min

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 5min

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).

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Average sunshine days in August
Grangeville, ID

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).

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Average UV index in August
Grangeville, ID

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).

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Average cloud cover in August
Grangeville, ID

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).

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Average visibility in August
Grangeville, ID

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).

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Grangeville, Idaho, USA

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