Climate averages 1991–2020
Fargo weather
in September.
A mild, moderately wet month: the 4th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Fargo: daytime highs average 20.9°C and nights cool to about 11.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 72 mm of rain on roughly 8 days, which makes September a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 37 min on an average September day.
The nearest other city in this atlas is Bismarck (304 km away). In September its highs average 21.4°C, 0.6°C warmer than Fargo, with 46 mm of rain.
Among the 498 cities listed in the United States, Fargo ranks 485th of 498 for the warmest September highs and joint 227th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Fargo is 6.0°C cooler than that mean.
From September to October, average highs fall by 8.6°C to 12.2°C, and monthly rainfall falls from 72 mm to 60 mm.
The annual picture
September in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Fargo climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -7.9°C-17.3°C | -17.3°C | 19 | 4.7 | 9.09 h |
| February | -4.6°C-14.5°C | -14.5°C | 18 | 4.6 | 10.310 h |
| March | 3.1°C-7.2°C | -7.2°C | 35 | 6.2 | 11.912 h |
| April | 11.5°C0.4°C | 0.4°C | 52 | 7.7 | 13.614 h |
| May | 18.8°C8.0°C | 8.0°C | 88 | 11.2 | 15.015 h |
| June | 24.1°C14.3°C | 14.3°C | 109 | 11.8 | 15.816 h |
| July | 26.7°C16.9°C | 16.9°C | 95 | 10.5 | 15.515 h |
| August | 25.9°C16.1°C | 16.1°C | 82 | 8.8 | 14.214 h |
| September, selected | 20.9°C11.4°C | 11.4°C | 72 | 8.1 | 12.613 h |
| October | 12.2°C3.8°C | 3.8°C | 60 | 7.7 | 10.911 h |
| November | 2.9°C-4.5°C | -4.5°C | 27 | 5.3 | 9.49 h |
| December | -4.7°C-12.7°C | -12.7°C | 24 | 5.7 | 8.69 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Bismarck in SeptemberUnited States · 304 kmHigh 21.4°C · Low 10.9°C · 46 mm rain
- Plymouth, United States in SeptemberUnited States · 331 kmHigh 21.5°C · Low 13.3°C · 82 mm rain
- Brooklyn Park in SeptemberUnited States · 331 kmHigh 21.6°C · Low 13.3°C · 84 mm rain
- Winnipeg in SeptemberCanada · 335 kmHigh 18.5°C · Low 9.4°C · 68 mm rain
- Minneapolis in SeptemberUnited States · 345 kmHigh 21.8°C · Low 13.4°C · 84 mm rain
- Bloomington (Minnesota), United States in SeptemberUnited States · 353 kmHigh 21.9°C · Low 13.8°C · 82 mm rain
- Duluth in SeptemberUnited States · 356 kmHigh 19.5°C · Low 13.8°C · 92 mm rain
- Saint Paul in SeptemberUnited States · 358 kmHigh 21.8°C · Low 13.4°C · 86 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Fargo) is explained once on the Fargo year overview and on the Sources, method and limits page.