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 also a moderately hot month in Grants Pass, Oregon, with temperature in the range of an average low of 49.1°F (9.5°C) and an average high of 84.7°F (29.3°C).

Temperature

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

Heat index

The average heat index is calculated to be a hot 89.8°F (32.1°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. 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 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, wind, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

August is the least humid month, 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. Throughout the year, there are 135.3 rainfall days, and 23.54" (598mm) of precipitation is accumulated.

Snowfall

In Grants Pass snow does not fall in May through October.

Daylight

In Grants Pass, the average length of the day in August is 13.8h.

Sunshine

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

UV index

The average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 5 in August interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What 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), August is the warmest month in Grants Pass, Oregon.

What is the temperature in August in Grants Pass?

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). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in August is calculated to be 89.8°F (32.1°C).

What is the least humid month in Grants Pass?

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

What is the average humidity in August in Grants Pass?

The average relative humidity in August is 63%.

How many days does it rain in August in Grants Pass?

In Grants Pass, Oregon, in August, during 2.5 rainfall days, 0.2" (5mm) of precipitation is typically accumulated.

When it does not snow in Grants Pass?

May through October are months without snowfall.

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

In Grants Pass, Oregon, the average length of the day in August is 13.8h.

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, Oregon.

How long on average sun shines in August in Grants Pass?

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

How high is the UV index in August in Grants Pass?

The average daily maximum UV index in August in Grants Pass is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

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"

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

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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").
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).
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: 13.8h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in August: 11.8h

Months with the most sunshine are July and August (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 4.7h).

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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).
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).
Months with the lowest visibility are January, February, March, April and December (4mi).

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