what's the temperature in juneau
Average Temperatures for Juneau. Juneau's coldest month is January when the average temperature overnight is 20.7Â°F. In July, the warmest month, the average day time temperature rises to 64.3Â°F. Average Rainfall for Juneau. The driest month in Juneau is April with 2.96 inches of precipitation, and with 8.30 inches October is the wettest month.