August weather forecast
Idaho Falls, ID

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An eye-catching shot of the Snake River, Idaho Falls, with a view of the iconic Idaho Falls Temple in the back
An eye-catching shot of the Snake River, Idaho Falls, with a view of the iconic Idaho Falls Temple in the back

Weather in August

August’s weather in Idaho Falls witness a slight drop in temperature from July, marking the beginning of the slow retreat of summer heat. The warmth, however, is still considerable, and combined with relatively low precipitation, conditions remain ideal for outdoor endeavors. Changes in daylight hours become more pronounced, hinting at the encroaching autumn. Despite this, residents and visitors continue to bask in the remnants of summer glory. High pressure conditions ensure clear skies for the lion's share of the month, making stargazing a popular pastime.

Temperature

Upon the onset of August, Idaho Falls witnesses an average high-temperature of a warm 84.4°F (29.1°C), showing a close resemblance to the prior month. Idaho Falls registers a prominent dip from daytime highs, with an average of 54.3°F (12.4°C) during the nights of August.

Humidity

With an average relative humidity of 35%, August is the least humid month.

Rainfall

In Idaho Falls, during August, the rain falls for 8.1 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, in Idaho Falls, there are 84.3 rainfall days, and 6.97" (177mm) of precipitation is accumulated.

Snowfall

In Idaho Falls, snow does not fall in June through August.

Daylight

The average length of the day in August in Idaho Falls is 13h and 55min.
On the first day of the month, sunrise is at 6:18 am and sunset at 8:50 pm. On the last day of August, sunrise is at 6:51 am and sunset at 8:04 pm MDT.

Sunshine

In Idaho Falls, the average sunshine in August is 11.7h.

UV index

The average daily maximum UV index in August in Idaho Falls is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In August, the maximum UV index of 5 suggests this advice:
Be vigilant - A duty to shield skin and eyes from injury exists. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
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Frequently asked questions

How hot does it get in Idaho Falls in August?

In August, the average high-temperature and low-temperature in Idaho Falls are 84.4°F (29.1°C) and 54.3°F (12.4°C) respectively.

What is the least humid month in Idaho Falls?

The least humid month in Idaho Falls, Idaho, is August, with an average relative humidity of 35%.

What is the average humidity in August in Idaho Falls?

In August, the average relative humidity in Idaho Falls, Idaho, is 35%.

How much does it rain in Idaho Falls in August?

In August, in Idaho Falls, the rain falls for 8.1 days. Throughout August, 0.63" (16mm) of precipitation is accumulated.

When it does not snow in Idaho Falls?

June through August are months without snowfall in Idaho Falls.

Does it snow in Idaho Falls in August?

In Idaho Falls, in August, it doesn't snow. In September, it regularly snows.

How many hours of daylight does Idaho Falls have in August?

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

When are sunrise and sunset in August in Idaho Falls?

In August, on the first day of the month, sunrise is at 6:18 am and sunset at 8:50 pm. On the last day of the month, in Idaho Falls, Idaho, sunrise is at 6:51 am and sunset at 8:04 pm MDT.

How long on average sun shines in August in Idaho Falls?

The average sunshine duration in August in Idaho Falls is 11.7h.

How high is the UV index in August in Idaho Falls?

In August, the average daily maximum UV index in Idaho Falls, Idaho, is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
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
Idaho Falls, ID

Average temperature in August - Idaho Falls, ID
  • Average high temperature in August: 84.4°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (27.9°F).

  • Average low temperature in August: 54.3°F

The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).

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Average pressure in August
Idaho Falls, ID

Average pressure in August - Idaho Falls, ID
  • Average pressure in August: 29.96"Hg

The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in August
Idaho Falls, ID

Average wind speed in August - Idaho Falls, ID
  • Average wind speed in August: 7.2mph

The windiest month (with the highest average wind speed) is April (9mph).
The calmest month (with the lowest average wind speed) is January (5.8mph).

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Average humidity in August
Idaho Falls, ID

Average humidity in August - Idaho Falls, ID
  • Average humidity in August: 35%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (35%).

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Average rainfall in August
Idaho Falls, ID

Average rainfall in August - Idaho Falls, ID
  • Average rainfall in August: 0.63"

The wettest months (with the highest rainfall) are May and September (0.83").
The driest month (with the least rainfall) is July (0.35").

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Average rainfall days in August
Idaho Falls, ID

Average rainfall days in August - Idaho Falls, ID
  • Average rainfall days in August: 8.1 days

The month with the highest number of rainy days is May (10.7 days).
The month with the least rainy days is January (3.7 days).

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Average snowfall in August
Idaho Falls, ID

Average snowfall in August - Idaho Falls, ID
  • Average snowfall in August: 0"

The month with the highest snowfall is January (3.86").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in August
Idaho Falls, ID

Average snowfall days in August - Idaho Falls, ID
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (12.9 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in August /
Average sunshine in August
Idaho Falls, ID

Average daylight in August / Average sunshine in August - Idaho Falls, ID
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in August: 11h and 4min

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

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Average sunshine days in August
Idaho Falls, ID

Average sunshine days in August - Idaho Falls, ID
  • Average sunshine days in August: 18.2 days

The month with the most sunshine days is October (22.1 days).
The month with the least sunshine days is February (16.2 days).

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Average UV index in August
Idaho Falls, ID

Average UV index in August - Idaho Falls, ID
  • 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, March, October, November and December (UV index 2).

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Average cloud cover in August
Idaho Falls, ID

Average cloud cover in August - Idaho Falls, ID
  • Average cloud cover in August: 11

The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 11).

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Average visibility in August
Idaho Falls, ID

Average visibility in August - Idaho Falls, ID
  • Average visibility in August: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).

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Idaho Falls, Idaho, USA

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