Best time to go to Fort Simpson
The best time to visit Fort Simpson can depend on the weather and when visitor numbers rise and fall. The hottest average temperature in Fort Simpson falls in July, when visitor numbers are slightly high and weather is mostly sunny with light rain. The coolest average temperature in Fort Simpson falls in January, visitor numbers are average and weather is mostly cloudy with no rain.
 Calendar Month |  Temperature |  Precipitation |  Cloudiness |  Occupancy |
| January | -7.2°F (-21.8°C) | No Rain | Mostly Cloudy | Average |
| February | -2.9°F (-19.4°C) | No Rain | Mostly Cloudy | Average |
| March | 8.4°F (-13.1°C) | No Rain | Mostly Cloudy | Slightly High |
| April | 27.3°F (-2.6°C) | No Rain | Mostly Cloudy | Average |
| May | 49.8°F (9.9°C) | No Rain | Mostly Sunny | Average |
| June | 61.3°F (16.3°C) | Light Rain | Mostly Sunny | Slightly High |
| July | 65.3°F (18.5°C) | Light Rain | Mostly Sunny | Slightly High |
| August | 60.6°F (15.9°C) | Light Rain | Mostly Sunny | Average |
| September | 48.9°F (9.4°C) | No Rain | Mostly Sunny | Average |
| October | 32.0°F (0.0°C) | No Rain | Mostly Cloudy | Slightly Low |
| November | 7.5°F (-13.6°C) | No Rain | Mostly Cloudy | Slightly Low |
| December | -6.3°F (-21.3°C) | No Rain | Mostly Cloudy | Slightly Low |
