Rhodochrosite: Specimen of rhodochrosite from the Sunnyside Mine, San Juan County, Colorado. Rhodochrosite is a manganese carbonate mineral (MnCO3) that is used as an ore of manganese and is also cut as a gemstone.
Climate for Juneau, Alaska. 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. The driest month in Juneau is April with 2.96 inches of precipitation, and with 8.30 inches October is the wettest month.
Key weather averages for Juneau in July. 1  16. 16Â°C max day temperature. 2  6. 6 hours of sunshine per day. 3  15. 15 days with some rainfall. 4  7. 7Â°C min night temperature. 5  17. 17 hours of daylight per day. 6  0. No heat & humidity. 7  117. 117 mm of monthly rainfall. 8  5. 5 (Moderate) UV index. 9  12. 12Â°C sea temperature.