Hurricane Ida made her landfall at the end of August, and continued to the eastern Seaboard to provide devastating rainfall and flash flooding before she expired at the beginning of September. Ida was an extraordinary storm, both for the strength at landfall, (and the forecast accuracy as it arrived, which definitely saved lives) and the flash flooding rains, which led to the second flash flood emergencies ever issued by the New York City office of the National Weather Service — the first was earlier in the month with Henri. It exposed the poor infrastructure of the region, which is ill equipped for torrential rains. which will only become more likely as we head into the future.
We had a lot of forecasts in the month of August, and some were impacted by the broad scope of Ida. Otherwise, heat and a break to some drought issues in the upper Midwest were the theme for the months. The Weather Channel concluded the month of August with the victory, followed closely by Weatherbug, a tandem that owns a tie at the top so far in 2021.
| Outlet | Forecast Wins (year) |
| Weatherbug | 10.66 |
| Victoria-Weather | 7 |
| The Weather Channel | 6.33 |
| Accuweather | 5.83 |
| Forecast.io | 3.83 |
| National Weather Service | 3.16 |
| WeatherNation | 1.16 |
