Look for pods of fish feeding on the surface during mid day during the blue-wing-olive hatch. Try big dry flies like Beetle, Hopper, or Cricket patterns, Fish Caddis and small ants along the banks. Nymph drop offs and seamlines. Strip streamers off the bank if in a boat, swing streamers if wading. Head hunt for surface feeders using a very long 6x leader to gently float the fly directly into the feeding fish.
Expect highs in the 30's