Average annual temperature is 17.2 °C
Absolute maximum temperature: 38.0 °C
Absolute minimum temperature: -4.9 °C
Number of sunny days: 179 days
Number of rainy days: 186 days
Look at detailed online map of McNairy County
* Weather data for McNairy County United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 21.4 | 26.3 | 26.2 | 29.0 | 31.8 | 37.1 | 35.8 | 38.0 | 33.6 | 31.5 | 26.3 | 20.1 |
| Average daytime temperature (°C) | 13.5 | 16.3 | 17.8 | 21.5 | 26.6 | 31.6 | 32.4 | 32.2 | 29.9 | 24.6 | 17.3 | 13.8 |
| Average temperature (°C) | 8.7 | 10.3 | 11.8 | 15.2 | 20.5 | 24.6 | 26.5 | 26.3 | 23.3 | 18.4 | 11.4 | 8.2 |
| Average night temperature (°C) | 4.9 | 6.2 | 7.1 | 10.3 | 15.3 | 18.9 | 21.7 | 21.8 | 18.1 | 13.5 | 6.8 | 4.1 |
| Absolute minimum temperature (°C) | -3.4 | -4.2 | -4.9 | 3.8 | 7.0 | 14.4 | 17.5 | 16.5 | 14.2 | 0.5 | -2.2 | -3.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.4 | 5.9 | 8.0 | 8.4 | 10.9 | 11.9 | 10.7 | 9.9 | 10.6 | 8.6 | 7.5 | 6.9 |
| Precipitation (mm) | 123 | 110 | 144 | 151 | 97 | 49 | 138 | 112 | 29 | 17 | 81 | 69 |
| Sunny days | 14 | 10 | 16 | 10 | 9 | 14 | 9 | 15 | 17 | 24 | 22 | 19 |
| Rainy days | 17 | 18 | 15 | 20 | 22 | 16 | 22 | 16 | 13 | 7 | 8 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit McNairy County during the most sunny months:
The largest precipitation sum in McNairy County is at