The weather up here can vary from day to day. Typically you can expect the afternoon temperatures to be around 65-85 degrees and the evenings to be around 40-50 degrees. May is typically the coolest month; in June the weather starts to warm up; July is usually quite warm; and August has very pleasant stable weather. The only predicable thing about the weather up here, is that it is unpredictable. Come prepared for a wide range of conditions.