July weather forecast
Forest Grove, OR

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Weather in July

July is a hot month in Forest Grove, with the temperature peaking at a scorching 77.5°F (25.3°C) and a minimum of 51.4°F (10.8°C). The humidity starts to fall, bringing some respite from the Summer heat. The panorama of the city morphs into a Summer haven; tourists flock in to enjoy the sun-soaked climate. The visibility extends, making local sightseeing enjoyable. The Summer heat is carried over into August, maintaining similar weather patterns.

Temperature

The arrival of July introduces a minor uplift in high-temperatures, adjusting from a pleasant 70.2°F (21.2°C) in June to a warm 77.5°F (25.3°C). Forest Grove registers a marked temperature plunge to a fresh 51.4°F (10.8°C) during the cool July nights.

Humidity

In Forest Grove, the average relative humidity in July is 70%.

Rainfall

July and August are months with the least rain when the rain falls for 6.5 days and typically aggregates up to 0.47" (12mm) of rain.

Snowfall

April through October are months without snowfall.

Daylight

In Forest Grove, the average length of the day in July is 15h and 16min.
On the first day of the month, sunrise is at 5:28 am and sunset at 9:04 pm. On the last day of July, sunrise is at 5:56 am and sunset at 8:41 pm PDT.

Sunshine

In Forest Grove, the average sunshine in July is 10.2h.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high UV index of 5 in July translates into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are July temperatures?

The high-temperature, in July, in Forest Grove, is 77.5°F (25.3°C), while the low-temperature averages to 51.4°F (10.8°C).

What is the average humidity in July?

The average relative humidity in July is 70%.

What is the driest month?

July and August are months with the least rain when the rain falls for 6.5 days and typically aggregates up to 0.47" (12mm) of rain.

How much does it rain in July?

In July, the rain falls for 6.5 days. Throughout July, 0.47" (12mm) of precipitation is accumulated.

When it does not snow?

In Forest Grove, snow does not fall in April through October.

How many hours of daylight does Forest Grove have in July?

In July, the average day length is 15h and 16min.

When is the sunrise / sunset in July?

On the first day of July, sunrise is at 5:28 am and sunset at 9:04 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 8:41 pm PDT.

How many hours of sunshine does Forest Grove have in July?

In Forest Grove, the average sunshine duration in July is 10.2h.

When is the highest UV index?

June and July, with an average maximum UV index of 5, are months with the highest UV index.

How high is the UV index in July?

In Forest Grove, the average daily maximum UV index in July is 5. A UV Index reading of 3 to 5 represents a medium hazard to health 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 July
Forest Grove, OR

Average temperature in July - Forest Grove, OR
  • Average high temperature in July: 77.5°F

The warmest month (with the highest average high temperature) is August (79.3°F).
The month with the lowest average high temperature is December (43°F).

  • Average low temperature in July: 51.4°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 (33.1°F).

Average pressure in July
Forest Grove, OR

Average pressure in July - Forest Grove, OR
  • Average pressure in July: 30.05"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

Average wind speed in July
Forest Grove, OR

Average wind speed in July - Forest Grove, OR
  • Average wind speed in July: 4.3mph

The windiest month (with the highest average wind speed) is March (4.9mph).
The calmest month (with the lowest average wind speed) is August (4mph).

Average humidity in July
Forest Grove, OR

Average humidity in July - Forest Grove, OR
  • Average humidity in July: 70%

The months with the highest relative humidity are February and December (88%).
The month with the lowest relative humidity is August (69%).

Average rainfall in July
Forest Grove, OR

Average rainfall in July - Forest Grove, OR
  • Average rainfall in July: 0.47"

The wettest month (with the highest rainfall) is January (5.47").
The driest months (with the least rainfall) are July and August (0.47").

Average rainfall days in July
Forest Grove, OR

Average rainfall days in July - Forest Grove, OR
  • Average rainfall days in July: 6.5 days

The month with the highest number of rainy days is March (21.4 days).
The month with the least rainy days is August (6.2 days).

Average snowfall in July
Forest Grove, OR

Average snowfall in July - Forest Grove, OR
  • Average snowfall in July: 0"

The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in July
Forest Grove, OR

Average snowfall days in July - Forest Grove, OR
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in July /
Average sunshine in July
Forest Grove, OR

Average daylight in July / Average sunshine in July - Forest Grove, OR
  • Average daylight in July: 15h and 2min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in July: 10h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 3h and 30min).

Average sunshine days in July
Forest Grove, OR

Average sunshine days in July - Forest Grove, OR
  • Average sunshine days in July: 21.8 days

The month with the most sunshine days is August (22 days).
The month with the least sunshine days is March (7.6 days).

Average UV index in July
Forest Grove, OR

Average UV index in July - Forest Grove, OR
  • Average UV index in July: 5

The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).

Average cloud cover in July
Forest Grove, OR

Average cloud cover in July - Forest Grove, OR
  • Average cloud cover in July: 31

The month with the most cloud cover is February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in July
Forest Grove, OR

Average visibility in July - Forest Grove, OR
  • Average visibility in July: 6mi

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

Forest Grove, Oregon, USA

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