Other facts from our historical weather data: Which months have the greatest rainfall in Redding? Most rainfall (rainy season) is seen in March and December. Does Redding have a dry season? Yes, the months of July, August and September are very dry. Which is the warmest month in Redding? July has an average maximum temperature of 37°C (99°F) and is the warmest month of the year. Which is the coldest month in Redding? The coldest month is December with an average maximum temperature of 13°C (55°F). Which is the wettest month in Redding? December tops the wettest month list with 182mm (7.2 in) of rainfall. Which is the driest month in Redding? August is the driest month with 1mm (0 in) of precipitation. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.