We conduct most of our Idaho and Oregon whitewater rafting trips from the end of May until the end of September. May through June daytime temperatures will average 70-80°F and night time temps will average 60°F. July through September daytime temps will average 80-90° F but can spike up to 100° F and our salvation from those occasional really hot days are nice cool 70° F evenings. Water temperatures are a refreshing 65-70° F so a daily swim keeps everyone feeling fresh. If there is unusual weather activity in the forecast we will let you know prior to trip departure.
Mosquitoes are never a problem and camping conditions are ideal. We can get an occasional rain storm or thunder shower which usually only serve to sweeten the air.
The following is a list of weather forecasts for each of our rivers and Joseph, Oregon. Water level graphs (flow graphs) are below as well.
Snake River through Hells Canyon Flows
Salmon River Flows
Grande Ronde River Flows