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.

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• Boise - August »
  On the last day of August, in Boise, sunrise is at 7:07 am and sunset at 8:22 pm MDT. In Boise, in August, it is raining for 4.9 days, with typically 0.24" of accumulated precipitation.
• Meridian - August »
  The months with the lowest humidity in Meridian are July and August, with an average relative humidity of 30%. In Meridian, Idaho, in August, during 3.4 rainfall days, 0.16" of precipitation is typically accumulated.
• 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" of rain. 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" of rain.
• Idaho Falls - August »
  The least humid month in Idaho Falls is August, with an average relative humidity of 35%. August is the least humid month in Idaho Falls, with an average relative humidity of 35%.
• Pocatello - August »
  On the first day of August in Pocatello sunrise is at 6:21 am and sunset at 8:51 pm. August continues to bathe Pocatello, Idaho in warm summer conditions, though it's slightly cooler than scorching July.
• Caldwell - August »
  With an average relative humidity of 29%, August is the least humid month in Caldwell, Idaho. On the first day of August in Caldwell sunrise is at 6:36 am and sunset at 9:10 pm.
• Coeur d'Alene - August »
  August is the least humid month in Coeur d'Alene with an average relative humidity of 48%. Coeur d'Alene, Idaho's weather continues to bask in the summer heat throughout August.
• Twin Falls - August »
  The months with the least rainfall in Twin Falls are July and August Rain falls for 4.4 days and accumulates 0.24" of rain. The months with the least rainfall in Twin Falls are July and August Rain falls for 4.4 days and accumulates 0.24" of rain.
• Lewiston - August »
  August is the month when Lewiston's temperatures reach their peak, with averages of 85.3°F and lows of 59.2°F. The month with the most sunshine in Lewiston is August, with an average of 12h of sunshine.
• Post Falls - August »
  August is the least humid month in Post Falls with an average relative humidity of 48%. In Post Falls, August is the warmest month, with temperatures averaging a high of 82°F and a low of 51.8°F.
• Rexburg - August »
  August is the least humid month in Rexburg with an average relative humidity of 38%. In Rexburg, Idaho, in August, during 8.3 rainfall days, 0.63" of precipitation is typically accumulated.
• Moscow - August »
  The months with the least rainfall in Moscow, Idaho, are July and August Rain falls for 5.9 days and accumulates 0.47" of rain. 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" of rain.