August weather forecast
Idaho, USA

August in Idaho continues the state's summer narrative, maintaining a warm embrace while hinting at the impending transition to fall. The sun still reigns supreme, casting its golden hue over towns, cities, and the vast wilderness.

Mountain regions, including areas like the Bitterroot Range, still present verdant landscapes, although there's a gradual shift. Some foliage starts hinting at autumnal colors, especially towards the end of the month, setting the stage for the vibrant transformation to come. While the meadows remain lively, the frequency of trekkers slightly diminishes as the month progresses.

Urban areas, such as Boise, usually see temperatures ranging from the mid to high 80s°F. This warmth is very similar to July, but with nights gradually becoming cooler, particularly in the latter half of August. Such a shift signals the upcoming transition to autumn.

Rainfall in August remains sparse, particularly in the eastern portions of the state. However, when rain does occur, especially in western regions closer to the Pacific, it often comes in brief, localized showers. These showers, though infrequent, offer a refreshing reprieve from the summer warmth.

Rivers and lakes remain popular destinations. Their waters, having absorbed the summer heat, are at their warmest. This makes August an excellent time for water-based recreational activities, be it rafting on the Snake River or swimming in Lake Pend Oreille.

As August winds down and September approaches, there's a subtle shift in the atmosphere. While the days are still undeniably summery, the evenings carry a hint of the crispness that September will bring in full measure.

---

• Boise - August »
  On the last day of August, in Boise sunrise is at 7:07 am and sunset at 8:22 pm MDT. The average sunshine duration in August is 11.4h.
• Meridian - August »
  July and August, with an average relative humidity of 30%, are the least humid months in Meridian, Idaho. Transitioning from July to August, Meridian observes an average high-temperature of a still tropical 89.1°F (31.7°C), differing subtly from the previous month.
• Nampa - August »
  July and August are months with the least rain in Nampa when the rain falls for 3.1 days and typically aggregates up to 0.12" (3mm) of rain. The months with the least rainfall in Nampa are July and August Rain falls for 3.1 days and accumulates 0.12" (3mm) of rain.
• Idaho Falls - August »
  August is the least humid month in Idaho Falls, with an average relative humidity of 35%. Idaho Falls's average high-temperature marks a moderately hot 84.4°F (29.1°C) with the advent of August, closely mirroring that of the preceding month.
• Pocatello - August »
  August continues to bathe Pocatello, Idaho in warm summer conditions, though it's slightly cooler than scorching July. In Pocatello snow does not fall in June through August.
• Caldwell - August »
  With an average relative humidity of 29%, August is the least humid month in Caldwell. On the first day of August in Caldwell, sunrise is at 6:36 am and sunset at 9:10 pm.
• Coeur d'Alene - August »
  The least humid month in Coeur d'Alene, Idaho, is August, with an average relative humidity of 48%. With an average relative humidity of 48%, August is the least humid month in Coeur d'Alene, Idaho.
• Twin Falls - August »
  On the last day of August, in Twin Falls sunrise is at 7:01 am and sunset at 8:14 pm MDT. The months with the least rainfall in Twin Falls are July and August Rain falls for 4.4 days and accumulates 0.24" (6mm) of rain.
• Lewiston - August »
  The month with the least rainfall in Lewiston is August, when the rain falls for 5.2 days and typically collects 0.31" (8mm) of precipitation. The month with the least rainfall in Lewiston is August, when the rain falls for 5.2 days and typically collects 0.31" (8mm) of precipitation.
• Post Falls - August »
  The months with the least rainfall in Post Falls are July and August Rain falls for 5.6 days and accumulates 0.43" (11mm) of rain. The months with the least rainfall in Post Falls are July and August Rain falls for 5.6 days and accumulates 0.43" (11mm) of rain.
• Rexburg - August »
  August is the least humid month in Rexburg with an average relative humidity of 38%. In Rexburg snow does not fall in June through August.
• Moscow - August »
  August proves to be the warmest month in Moscow recording an average peak temperature of 83.7°F (28.7°C) and a minimum temperature of 58.1°F (14.5°C). July and August are months with the least rain in Moscow, Idaho, when the rain falls for 5.9 days and typically aggregates up to 0.47" (12mm) of rain.