Rocky Grove Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from comfortable to chilly in Rocky Grove. Average daytime temperatures reach a comfortable 28°C (82°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 8°C (46°F).

At night, temperatures range from around 16°C (61°F) in July to -4°C (25°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rocky Grove has a relatively rain/snowy climate with high precipitation levels, averaging 1466 mm (58 in) of rain/snowfall annually. Rocky Grove experiences moderate seasonal variation in rainfall, with monthly averages ranging from 174 mm (6.9 in) in July, the wettest month, and 92 mm (3.6 in) in February, the driest month. For more details, please visit our Rocky Grove Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Rocky Grove can be enjoyed more throughout the sunniest month of June under a blue sky, with approximately 9.7 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 4.2 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Rocky Grove.

The city experiences its highest humidity in July, reaching 76%. In April, the humidity drops to its lowest level at 63%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year