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What is Tonica, IL, Weather Like in October?
During the month of October, Tonica, IL,
has an average daytime high temperature of 65°F and an average overnight low temperature dropping to 41°F.
Around 3.50 inches of precipitation is received during the month,
with about 33.24 inches falling in a typical year.
0.20 inches of snow is the mean amount received during October.
Annually, Tonica receives around 18.90 inches of snow.
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: 74.8 F
(+8.3 vs avg)
Average Low: 52 F
(+9.1 vs avg)
This month was significantly warmer than average.
Actual data from: KVYS
Tonica, IL Daily Weather Averages for October
Recorded at Peru
(usc00116753),
9.5 miles
NNW of
Tonica, IL
| Day | Avg Temps (°F) | Precip (in) | Snow (in) | Degree Days (°F) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Low | High | Mean | Month | Year | Month | Year | Heat | Cool | |
| 10/1 | 47 F | 71 F | 59 F | 0.11" | 29.85" | 0.00" | 18.70" | 7.2 F | 1.1 F |
| 10/2 | 46 F | 71 F | 59 F | 0.23" | 29.97" | 0.00" | 18.70" | 7.6 F | 1 F |
| 10/3 | 46 F | 70 F | 58 F | 0.35" | 30.09" | 0.00" | 18.70" | 7.9 F | 0.9 F |
| 10/4 | 45 F | 70 F | 58 F | 0.46" | 30.20" | 0.00" | 18.70" | 8.3 F | 0.9 F |
| 10/5 | 45 F | 69 F | 57 F | 0.58" | 30.32" | 0.00" | 18.70" | 8.6 F | 0.8 F |
| 10/6 | 45 F | 69 F | 57 F | 0.69" | 30.43" | 0.00" | 18.70" | 9 F | 0.8 F |
| 10/7 | 44 F | 68 F | 56 F | 0.80" | 30.54" | 0.00" | 18.70" | 9.4 F | 0.7 F |
| 10/8 | 44 F | 68 F | 56 F | 0.91" | 30.65" | 0.00" | 18.70" | 9.8 F | 0.7 F |
| 10/9 | 44 F | 68 F | 56 F | 1.02" | 30.76" | 0.00" | 18.70" | 10.1 F | 0.6 F |
| 10/10 | 43 F | 67 F | 55 F | 1.13" | 30.87" | 0.00" | 18.70" | 10.5 F | 0.6 F |
| 10/11 | 43 F | 67 F | 55 F | 1.25" | 30.99" | 0.00" | 18.70" | 10.9 F | 0.5 F |
| 10/12 | 43 F | 66 F | 54 F | 1.36" | 31.10" | 0.00" | 18.70" | 11.2 F | 0.4 F |
| 10/13 | 42 F | 66 F | 54 F | 1.47" | 31.21" | 0.00" | 18.70" | 11.6 F | 0.4 F |
| 10/14 | 42 F | 65 F | 53 F | 1.59" | 31.33" | 0.00" | 18.70" | 11.9 F | 0.3 F |
| 10/15 | 41 F | 65 F | 53 F | 1.70" | 31.44" | 0.00" | 18.70" | 12.3 F | 0.3 F |
| 10/16 | 41 F | 64 F | 53 F | 1.81" | 31.55" | 0.00" | 18.70" | 12.7 F | 0.2 F |
| 10/17 | 41 F | 64 F | 52 F | 1.92" | 31.66" | 0.00" | 18.70" | 13.1 F | 0.2 F |
| 10/18 | 40 F | 63 F | 52 F | 2.04" | 31.78" | 0.00" | 18.70" | 13.5 F | 0.2 F |
| 10/19 | 40 F | 62 F | 51 F | 2.15" | 31.89" | 0.00" | 18.70" | 13.9 F | 0.2 F |
| 10/20 | 40 F | 62 F | 51 F | 2.26" | 32.00" | 0.00" | 18.70" | 14.3 F | 0.1 F |
| 10/21 | 39 F | 61 F | 50 F | 2.37" | 32.11" | 0.10" | 18.80" | 14.7 F | 0.1 F |
| 10/22 | 39 F | 61 F | 50 F | 2.48" | 32.22" | 0.10" | 18.80" | 15.2 F | 0.1 F |
| 10/23 | 39 F | 60 F | 50 F | 2.59" | 32.33" | 0.10" | 18.80" | 15.6 F | 0.1 F |
| 10/24 | 38 F | 60 F | 49 F | 2.71" | 32.45" | 0.10" | 18.80" | 16 F | 0.1 F |
| 10/25 | 38 F | 59 F | 49 F | 2.82" | 32.56" | 0.10" | 18.80" | 16.4 F | 0.1 F |
| 10/26 | 38 F | 59 F | 48 F | 2.93" | 32.67" | 0.10" | 18.80" | 16.9 F | 0.1 F |
| 10/27 | 37 F | 58 F | 48 F | 3.04" | 32.78" | 0.10" | 18.80" | 17.3 F | 0.1 F |
| 10/28 | 37 F | 58 F | 47 F | 3.16" | 32.90" | 0.20" | 18.90" | 17.7 F | 0.1 F |
| 10/29 | 37 F | 57 F | 47 F | 3.28" | 33.02" | 0.20" | 18.90" | 18.1 F | 0.1 F |
| 10/30 | 36 F | 57 F | 47 F | 3.39" | 33.13" | 0.20" | 18.90" | 18.6 F | 0.1 F |
| 10/31 | 36 F | 56 F | 46 F | 3.50" | 33.24" | 0.20" | 18.90" | 19 F | 0.1 F |
