Though weather is just one factor, it can really affect your travel plans, especially when you are planning a longer stay in Tamiyah. The hottest months are usually July and August with an average temp of 87°F, while the coldest months are January and February with an average of 62°F. From January through March, the daytime average is 78°F and the nighttime average is 50°F. Between April and June, temperatures average 99°F during the day and 62°F at night. July through September averages 101°F during the day and 74°F at night. In October-December, the average temperature is 88°F during the day and 54°F at night.