Although weather is just one factor, it can really affect your travel plans, especially if you're planning an extended stay in Grand Forks Air Force Base. 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 -10°C. The snowiest months in Grand Forks Air Force Base are April, October, December and February, with each month seeing an average of 19 cm of snowfall.