Grand Forks, ND weather in August
Grand Forks is mild in August, with some rain: highs average 79°F and nights drop to about 57°F. There are about 9 days with rain. This is the peak of the warm season in Grand Forks. A good month for most outdoor plans.
- Normal high
- 79°F
- Normal low
- 57°F
- Wet days
- 9
- 3.0 in total
- Muggy days
- 4
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 81°F | 76°F |
| Normal low | 59°F | 53°F |
| Chance of a wet day | 28% | 30% |
| Sunrise / sunset | 6:04 am / 9:04 pm | 6:45 am / 8:11 pm |
| Daylight | 15.0 h | 13.4 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical August day
- 6 am58°Fdew point 56°F
- 9 am68°Fdew point 59°F
- Noon76°Fdew point 58°F
- 3 pm78°Fdew point 58°F
- 6 pm76°Fdew point 58°F
- 9 pm66°Fdew point 59°F
NOAA hourly normals (local standard time) from Grand Forks Af (17 mi away); average wind 9 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F12 of 31
- Hot dayshigh 90°F or more2 of 31
- Muggy daysdaily mean dew point 65°F or more4 of 31
- Wet daysat least 0.01 in of rain or melted snow9 of 31
- Notable rainat least 0.10 in5 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 3.0 in; a dry August brings about 2.3 in and a wet one about 3.8 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20201991: average high 85°F
- Coolest August2004: average high 72°F
- Wettest August2002: 6.7 in
- Driest August2013: 0.8 in
- Highest reading99°F (August 28, 1991)
- Lowest reading35°F (August 20, 2004)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 80°F | 79°F | 70°F |
| Normal low | 59°F | 57°F | 47°F |
| Wet days | 10 | 9 | 9 |
| Comfortable days | 10 | 12 | 15 |
| Daylight | 15.6 h | 14.2 h | 12.6 h |
Highs change by -1°F from July and -9°F into September.
How Grand Forks ranks in August
- Normal high319th warmest of 378 cities; 4th of 4 in North Dakota
- Wet days186th driest of 378
- Comfortable days44th most of 341
What to pack for Grand Forks in August
- A rain jacket or umbrella – rain on about 9 days
- Sunglasses and sunscreen – about 14.2 hours of daylight and highs near 79°F
Heating and cooling
August has 39 heating degree days and 127 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Grand Forks in August?
The normal high is 79°F and the normal low is 57°F. From 1991 to 2020 the hottest August reading was 99°F (August 28, 1991).
Does it rain a lot in Grand Forks in August?
About 9 days in August have at least 0.01 in of precipitation, and the normal total is 3.0 in. The wettest August in 1991-2020 was in 2002 (6.7 in); the driest was in 2013 (0.9 in).
Is August a good time to visit Grand Forks?
August ranks 4th of 12 months on our comfort score for Grand Forks (68 out of 100). It has about 12 comfortable days and about 2 days at 90°F or hotter. The best months are May, June and September.
Where the numbers come from
- Temperature, rain, snowfall and frost dates: Grand Forks Univ (NWS) (USC00323621), 3.0 mi W of the city center, 830 ft . NOAA normals and daily records, 1991-2020.
- Snow depth: Grand Forks Intl Airport (USW00014916), 7.1 mi W of the city center, 842 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Grand Forks Af (USW00094925), 17 mi W of the city center, 906 ft (76 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Grand Forks AFB Airport (727575-94925), 17 mi W of the city center, 913 ft (83 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).