Click on a day for an hourly weather forecast
The temperatures in Grand Forks in August are comfortable with low of 15°C and and high up to 27°C.
You can expect about 3 to 8 days of rain in Grand Forks during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Grand Forks in August 2025.
If you’re planning to visit Grand Forks in the near future, we highly recommend that you review the 14 day weather forecast for Grand Forks before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -9° / -18° | 7 | 21 | 3 | 18 mm | Awful | Grand Forks in January |
| February | -8° / -17° | 5 | 20 | 2 | 16 mm | Awful | Grand Forks in February |
| March | 1° / -8° | 5 | 21 | 4 | 35 mm | Awful | Grand Forks in March |
| April | 9° / 0° | 6 | 22 | 2 | 58 mm | Bad | Grand Forks in April |
| May | 19° / 8° | 8 | 23 | 0 | 96 mm | Ok | Grand Forks in May |
| June | 24° / 14° | 8 | 22 | 0 | 112 mm | Good | Grand Forks in June |
| July | 27° / 16° | 6 | 25 | 0 | 81 mm | Perfect | Grand Forks in July |
| August | 27° / 15° | 6 | 25 | 0 | 78 mm | Perfect | Grand Forks in August |
| September | 22° / 11° | 5 | 25 | 0 | 63 mm | Good | Grand Forks in September |
| October | 12° / 4° | 5 | 25 | 1 | 59 mm | Ok | Grand Forks in October |
| November | 2° / -5° | 6 | 22 | 2 | 23 mm | Awful | Grand Forks in November |
| December | -7° / -14° | 8 | 20 | 3 | 31 mm | Awful | Grand Forks in December |