July through the end of October is the driest part of the year for Stanley. During that time, an avg. of 2.85 inches of precip is logged, or 21.6% of the annual avg. of 13.17 inches.
"What about September? The current month's avg. high is 68.6 and the long term avg. low is 27.2. The highest temp ever recorded in Stanley for September was 89 degrees in 1988. The lowest was +9 in 1985.
Avg. precip is 0.78 inches (just over 3/4 of an inch). The one day max precip was 1.00 inch on September 1st, 2000. Over the long term, September has seen months with no precip whatsoever. In 1987, Stanley recorded a September precip of 3.10 inches, which included 5.5 inches of snow. Avg. snowfall in Stanley for September is less than a half-inch.
On the long term, September typically has five days when precip greater than a hundredth of an inch falls but only two days when precip greater than a tenth of an inch falls. Overall, precip in September is highly variable as the first graph shows. The second temperature graph clearly shows the peak of heat of 2012 is past as temps begin their decent into the upcoming depths of winter. The record low ever recorded in Stanley was -54 on December 23rd, 1983."
Here are a couple of graphics for Stanley weather in September. Basically Salmon's climate is pretty much the same only warmer. As far as precip, the same could be said for Salmon as is the case for Stanley. Links to the weather data sites are below the next two graphics.
Here's the links
Stanley Climate Statistics
Salmon Airport Climate Statistics
Salmon KSRA Climate Statistics