Although weather is just one factor, it can really affect your travel plans, especially if you're planning an extended stay in Fort Ripley. The hottest months are usually July and August, with an average temperature of 19°C, while the coldest months are January and February, with an average of -8°C. The snowiest months in Fort Ripley are March, April, January and December, with each month seeing an average of 24 cm of snowfall.