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What is Mercer, TN, Weather Like in October?
During the month of October, Mercer, TN,
has an average daytime high temperature of 74°F and an average overnight low temperature dropping to 49°F.
Around 3.63 inches of precipitation is received during the month,
with about 44.59 inches falling in a typical year.
Snow is not common in Mercer, TN.
October 2025: Actual vs. Average Temperatures
Showing temperatures through today (October 22, 2025)
Actual High
Average High
Actual Low
Average Low
Month Summary
Average High: 80.1 F
(+4.8 vs avg)
Average Low: 55 F
(+4.9 vs avg)
This month was significantly warmer than average.
Actual data from: KMKL
Mercer, TN Daily Weather Averages for October
Recorded at Jackson Mckellar Ap
(usw00003811),
9.7 miles
NE of
Mercer, TN
| Day | Avg Temps (°F) | Precip (in) | Snow (in) | Degree Days (°F) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Low | High | Mean | Month | Year | Month | Year | Heat | Cool | |
| 10/1 | 54 F | 79 F | 66 F | 0.13" | 41.09" | N/A | N/A | 2.5 F | 3.9 F |
| 10/2 | 54 F | 79 F | 66 F | 0.26" | 41.22" | N/A | N/A | 2.6 F | 3.7 F |
| 10/3 | 53 F | 78 F | 66 F | 0.39" | 41.35" | N/A | N/A | 2.8 F | 3.5 F |
| 10/4 | 53 F | 78 F | 65 F | 0.52" | 41.48" | N/A | N/A | 3 F | 3.3 F |
| 10/5 | 52 F | 78 F | 65 F | 0.65" | 41.61" | N/A | N/A | 3.2 F | 3.1 F |
| 10/6 | 52 F | 77 F | 65 F | 0.77" | 41.73" | N/A | N/A | 3.3 F | 2.9 F |
| 10/7 | 52 F | 77 F | 64 F | 0.89" | 41.85" | N/A | N/A | 3.5 F | 2.7 F |
| 10/8 | 51 F | 77 F | 64 F | 1.01" | 41.97" | N/A | N/A | 3.7 F | 2.5 F |
| 10/9 | 51 F | 76 F | 63 F | 1.12" | 42.08" | N/A | N/A | 4 F | 2.4 F |
| 10/10 | 50 F | 76 F | 63 F | 1.22" | 42.18" | N/A | N/A | 4.2 F | 2.2 F |
| 10/11 | 50 F | 75 F | 63 F | 1.32" | 42.28" | N/A | N/A | 4.4 F | 2.1 F |
| 10/12 | 50 F | 75 F | 62 F | 1.42" | 42.38" | N/A | N/A | 4.7 F | 1.9 F |
| 10/13 | 49 F | 75 F | 62 F | 1.53" | 42.49" | N/A | N/A | 4.9 F | 1.8 F |
| 10/14 | 49 F | 74 F | 62 F | 1.64" | 42.60" | N/A | N/A | 5.1 F | 1.6 F |
| 10/15 | 49 F | 74 F | 61 F | 1.75" | 42.71" | N/A | N/A | 5.3 F | 1.5 F |
| 10/16 | 48 F | 73 F | 61 F | 1.87" | 42.83" | N/A | N/A | 5.6 F | 1.3 F |
| 10/17 | 48 F | 73 F | 60 F | 1.98" | 42.94" | N/A | N/A | 5.9 F | 1.2 F |
| 10/18 | 47 F | 73 F | 60 F | 2.11" | 43.07" | N/A | N/A | 6.2 F | 1.2 F |
| 10/19 | 47 F | 72 F | 60 F | 2.23" | 43.19" | N/A | N/A | 6.5 F | 1.1 F |
| 10/20 | 47 F | 72 F | 59 F | 2.36" | 43.32" | N/A | N/A | 6.9 F | 1.1 F |
| 10/21 | 46 F | 71 F | 59 F | 2.48" | 43.44" | N/A | N/A | 7.3 F | 1 F |
| 10/22 | 46 F | 71 F | 58 F | 2.60" | 43.56" | N/A | N/A | 7.6 F | 1 F |
| 10/23 | 45 F | 71 F | 58 F | 2.72" | 43.68" | N/A | N/A | 8 F | 1 F |
| 10/24 | 45 F | 70 F | 58 F | 2.85" | 43.81" | N/A | N/A | 8.3 F | 0.9 F |
| 10/25 | 45 F | 70 F | 57 F | 2.97" | 43.93" | N/A | N/A | 8.7 F | 0.9 F |
| 10/26 | 44 F | 69 F | 57 F | 3.08" | 44.04" | N/A | N/A | 9 F | 0.8 F |
| 10/27 | 44 F | 69 F | 56 F | 3.19" | 44.15" | N/A | N/A | 9.3 F | 0.7 F |
| 10/28 | 44 F | 69 F | 56 F | 3.30" | 44.26" | N/A | N/A | 9.7 F | 0.7 F |
| 10/29 | 43 F | 68 F | 56 F | 3.41" | 44.37" | N/A | N/A | 10 F | 0.7 F |
| 10/30 | 43 F | 68 F | 55 F | 3.52" | 44.48" | N/A | N/A | 10.4 F | 0.7 F |
| 10/31 | 43 F | 67 F | 55 F | 3.63" | 44.59" | N/A | N/A | 10.8 F | 0.6 F |
