August weather forecast
Grants Pass, OR

Colorful balloons rise from the scenic grounds in a field near Grant Pass, Oregon
Colorful balloons rise from the scenic grounds in a field near Grant Pass, Oregon

Weather in August

The last month of the summer, August, is another warm month in Grants Pass, Oregon, with an average temperature varying between 84.7°F (29.3°C) and 49.1°F (9.5°C).

Temperature

With an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 49.1°F (9.5°C), August is the warmest month.

Heat index

In August, the average heat index is appraised at a tropical 89.6°F (32°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, pregnancy, clothing). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

August is the least humid month in Grants Pass, with an average relative humidity of 63%.

Rainfall

In Grants Pass, during August, the rain falls for 2.5 days and regularly aggregates up to 0.2" (5mm) of precipitation. In Grants Pass, during the entire year, the rain falls for 135.3 days and collects up to 23.54" (598mm) of precipitation.

Snowfall

May through October are months without snowfall in Grants Pass.

Daylight

In Grants Pass, the average length of the day in August is 13h and 51min.
On the first day of August, sunrise is at 6:05 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:49 pm PDT.

Sunshine

The months with the most sunshine are July and August, with an average of 11.8h of sunshine.

UV index

In Grants Pass, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In August, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Grants Pass?

August is the warmest month in Grants Pass, with an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 49.1°F (9.5°C).

What is the temperature in August in Grants Pass?

In Grants Pass, Oregon, in August, the average high-temperature is 84.7°F (29.3°C), and the average low-temperature is 49.1°F (9.5°C). in August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 89.6°F (32°C).

What is the least humid month in Grants Pass?

The least humid month in Grants Pass is August, with an average relative humidity of 63%.

What is the average humidity in August in Grants Pass?

The average relative humidity in August in Grants Pass is 63%.

How much does it rain in Grants Pass in August?

In Grants Pass, Oregon, during August, the rain falls for 2.5 days and regularly aggregates up to 0.2" (5mm) of precipitation.

When it does not snow in Grants Pass?

May through October are months without snowfall.

What is the average length of the day in August in Grants Pass?

The average day length in August in Grants Pass, Oregon, is 13h and 51min.

When is the sunrise / sunset in August in Grants Pass?

On the first day of August in Grants Pass, sunrise is at 6:05 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:49 pm PDT.

What are the months with the most sunshine in Grants Pass?

July and August, with an average of 11.8h of sunshine, are months with the most sunshine in Grants Pass.

How many hours of sunshine does Grants Pass have in August?

In Grants Pass, the average sunshine duration in August is 11.8h.

What is the UV index reading in August in Grants Pass?

The average daily maximum UV index in August in Grants Pass is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Grants Pass, OR

Average temperature in August - Grants Pass, OR
  • Average high temperature in August: 84.7°F

The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is December (46°F).

  • Average low temperature in August: 49.1°F

The month with the highest average low temperature is August (49.1°F).
The coldest month (with the lowest average low temperature) is December (31.5°F).

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Average pressure in August
Grants Pass, OR

Average pressure in August - Grants Pass, OR
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).

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Average wind speed in August
Grants Pass, OR

Average wind speed in August - Grants Pass, OR
  • Average wind speed in August: 3.2mph

The windiest month (with the highest average wind speed) is March (4mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).

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Average humidity in August
Grants Pass, OR

Average humidity in August - Grants Pass, OR
  • Average humidity in August: 63%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (63%).

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Average rainfall in August
Grants Pass, OR

Average rainfall in August - Grants Pass, OR
  • Average rainfall in August: 0.2"

The wettest month (with the highest rainfall) is December (4.02").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in August
Grants Pass, OR

Average rainfall days in August - Grants Pass, OR
  • Average rainfall days in August: 2.5 days

The month with the highest number of rainy days is March (18.7 days).
The month with the least rainy days is August (2.5 days).

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Average snowfall in August
Grants Pass, OR

Average snowfall in August - Grants Pass, OR
  • Average snowfall in August: 0"

The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Grants Pass, OR

Average snowfall days in August - Grants Pass, OR
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Grants Pass, OR

Average daylight in August / Average sunshine in August - Grants Pass, OR
  • Average daylight in August: 13h and 51min

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

  • Average sunshine in August: 11h and 48min

The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).

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Average sunshine days in August
Grants Pass, OR

Average sunshine days in August - Grants Pass, OR
  • Average sunshine days in August: 26.5 days

The month with the most sunshine days is July (26.7 days).
The month with the least sunshine days is March (10.8 days).

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Average UV index in August
Grants Pass, OR

Average UV index in August - Grants Pass, 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).

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Average cloud cover in August
Grants Pass, OR

Average cloud cover in August - Grants Pass, OR
  • Average cloud cover in August: 16

The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in August
Grants Pass, OR

Average visibility in August - Grants Pass, OR
  • Average visibility in August: 6mi

The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).

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