August weather forecast
Boise, ID

The golden fall season in Boise, Idaho
The golden fall season in Boise, Idaho

Weather in August

The last month of the summer, August, is also a hot month in Boise, Idaho, with an average temperature varying between 86.5°F (30.3°C) and 61.3°F (16.3°C).

Temperature

In August, the average high-temperature is practically the same as in July - a still tropical 86.5°F (30.3°C). In Boise, the average low-temperature is 61.3°F (16.3°C).

Humidity

In Boise, the average relative humidity in August is 31%.

Rainfall

In Boise, in August, during 4.9 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. In Boise, during the entire year, the rain falls for 116.8 days and collects up to 15.08" (383mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In Boise, the average length of the day in August is 13h and 55min.
On the first day of the month, sunrise is at 6:34 am and sunset at 9:08 pm. On the last day of August, sunrise is at 7:07 am and sunset at 8:22 pm MDT.

Sunshine

The average sunshine in August in Boise is 11.4h.

UV index

In Boise, 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 exposure to the Sun's UV rays for average individuals.
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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
[Resources]

FAQ

What is the temperature in August in Boise?

The average high-temperature, in August, is 86.5°F (30.3°C), while the average low-temperature is 61.3°F (16.3°C).

What is the average humidity in August in Boise?

In August, the average relative humidity in Boise is 31%.

How many days does it rain in August in Boise?

In Boise, in August, during 4.9 rainfall days, 0.24" (6mm) of precipitation is typically accumulated.

When it does not snow in Boise?

In Boise, snow does not fall in May through October.

How many hours of daylight does Boise have in August?

In August, the average day length in Boise, Idaho, is 13h and 55min.

What time are sunrise and sunset in August in Boise?

In August, on the first day of the month, sunrise is at 6:34 am and sunset at 9:08 pm. On the last day of the month, in Boise, sunrise is at 7:07 am and sunset at 8:22 pm MDT.

How long on average sun shines in August in Boise?

The average sunshine duration in August in Boise is 11.4h.

What is the UV index reading in August in Boise?

In August, the average daily maximum UV index in Boise is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
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
Boise, ID

Average temperature in August - Boise, ID
  • Average high temperature in August: 86.5°F

The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is December (34.7°F).

  • Average low temperature in August: 61.3°F

The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.2°F).

[Resources]

Average pressure in August
Boise, ID

Average pressure in August - Boise, ID
  • Average pressure in August: 29.91"Hg

The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

[Resources]

Average wind speed in August
Boise, ID

Average wind speed in August - Boise, ID
  • Average wind speed in August: 5.4mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).

[Resources]

Average humidity in August
Boise, ID

Average humidity in August - Boise, ID
  • Average humidity in August: 31%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (30%).

[Resources]

Average rainfall in August
Boise, ID

Average rainfall in August - Boise, ID
  • Average rainfall in August: 0.24"

The wettest month (with the highest rainfall) is March (2.2").
The driest month (with the least rainfall) is July (0.2").

[Resources]

Average rainfall days in August
Boise, ID

Average rainfall days in August - Boise, ID
  • Average rainfall days in August: 4.9 days

The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is July (4.5 days).

[Resources]

Average snowfall in August
Boise, ID

Average snowfall in August - Boise, ID
  • Average snowfall in August: 0"

The month with the highest snowfall is December (6.65").
The months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days in August
Boise, ID

Average snowfall days in August - Boise, ID
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

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

Average daylight in August / Average sunshine in August - Boise, ID
  • Average daylight in August: 13h and 55min

The month with the longest days is June (Average daylight: 15h and 23min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in August: 11h and 24min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

[Resources]

Average sunshine days in August
Boise, ID

Average sunshine days in August - Boise, ID
  • Average sunshine days in August: 21.7 days

The month with the most sunshine days is July (23.6 days).
The month with the least sunshine days is March (12.1 days).

[Resources]

Average UV index in August
Boise, ID

Average UV index in August - Boise, ID
  • Average UV index in August: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

[Resources]

Average cloud cover in August
Boise, ID

Average cloud cover in August - Boise, ID
  • Average cloud cover in August: 9

The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 8).

[Resources]

Average visibility in August
Boise, ID

Average visibility in August - Boise, ID
  • Average visibility in August: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location