The climate of Weakley County is classified as mid-temperate with fairly cool winters and warm, moist summers. The fall months of September, October, and November have extended periods of fair weather and generally low wind speeds with minimal precipitation. An attractive aspect to the county climate is four distinctive seasons, each with its own special beauty.

Mean Average Annual Temperature: 57.8 Degrees F
Mean Average Maximum Temperature: 69.1 Degrees F
Mean Average Minimum Temperature: 46.4 Degrees F
Mean Average Annual Precipitation: 53.13 Inches
Annual Total Number of Normal Degree Heating Days: 4147
Annual Total Number of Normal Degree Cooling Days: 1530
Prevailing Direction of Wind: West-Southwest
Mean Hourly Speed: 8.8 Miles Per Hour
Average Relative Humidity - Morning: 80%
Average Relative Humidity - Afternoon: 60%
Average Length of Snowing Season: 140 Days
Average Date of First Frost: November 12
Average Date of Last Frost: March 20
Average Growing Season: 236 Days