August weather forecast
Grants Pass, OR

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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

August persists with the prevailing summer warmth, albeit with a slight rise in temperatures. The trend of decreased rainfall continues into this month, with total precipitation rolling in at 0.2" (5mm) across 2.5 days. The city enjoys ample sunlight, long day hours, and an extended window of clear skies. Wind conditions continue to remain calm, with the city basking in gentle summer breezes. Rising UV Index points to increased sun exposure, a common summer trait.

Temperature

The warmest period tends to be August, when average temperatures fluctuate between a high of 84.7°F (29.3°C) and a low of 49.1°F (9.5°C).

Heat index

The heat index in August is evaluated at a tropical 89.6°F (32°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.
Note that heat index values are valued for light wind and location in the shade. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.

Humidity

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

Rainfall

In Grants Pass, in August, it is raining for 2.5 days, with typically 0.2" (5mm) of accumulated precipitation. Throughout the year, there are 135.3 rainfall days, and 23.54" (598mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

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 6:06 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:48 pm PDT.

Sunshine

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

UV index

In August, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: During August, 5 as the daily maximum UV index converts into the following advice:
Adopt protective measures - Suggestions to resist sunburn are offered. Around midday, solar radiation is most harmful; hence, exposure should be limited. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What is the hottest time of year in Grants Pass?

Temperature readings reach their annual highs in August, averaging 84.7°F (29.3°C) and a minimum average of 49.1°F (9.5°C).

Is it hot in Grants Pass during August?

Grants Pass in August has an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 49.1°F (9.5°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is evaluated at 89.6°F (32°C).

What is the least humid month in Grants Pass?

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

What is the average humidity in August in Grants Pass?

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, in August, it is raining for 2.5 days, with typically 0.2" (5mm) of accumulated precipitation.

When it does not snow in Grants Pass?

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

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

In Grants Pass, the average day length in August is 13h and 51min.

What time are sunrise and sunset in August in Grants Pass?

On the first day of August in Grants Pass, Oregon, sunrise is at 6:06 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:48 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.

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

In August, the average sunshine duration is 11.8h.

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

In August, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health risk 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
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 5min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in August: 11h and 5min

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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Grants Pass, Oregon, USA

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