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What is Percy, IL, Weather Like in October?
During the month of October, Percy, IL,
has an average daytime high temperature of 71°F and an average overnight low temperature dropping to 44°F.
Around 3.34 inches of precipitation is received during the month,
with about 38.86 inches falling in a typical year.
As you might expect, snow is not common in the month of October.
Annually, Percy receives around 7.50 inches of snow.
October 2025: Actual vs. Average Temperatures
Showing temperatures through today (October 21, 2025)
Actual High
Average High
Actual Low
Average Low
Month Summary
Average High: 81.7 F
(+9.4 vs avg)
Average Low: 56 F
(+10.1 vs avg)
This month was significantly warmer than average.
Actual data from: KSAR
Percy, IL Daily Weather Averages for October
Recorded at Sparta 1 W
(usc00118147),
8.7 miles
NW of
Percy, IL
| Day | Avg Temps (°F) | Precip (in) | Snow (in) | Degree Days (°F) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Low | High | Mean | Month | Year | Month | Year | Heat | Cool | |
| 10/1 | 49 F | 76 F | 62 F | 0.08" | 35.60" | 0.00" | 7.50" | 4.8 F | 2.3 F |
| 10/2 | 49 F | 75 F | 62 F | 0.16" | 35.68" | 0.00" | 7.50" | 5.1 F | 2.1 F |
| 10/3 | 48 F | 75 F | 62 F | 0.25" | 35.77" | 0.00" | 7.50" | 5.3 F | 2 F |
| 10/4 | 48 F | 75 F | 61 F | 0.35" | 35.87" | 0.00" | 7.50" | 5.5 F | 1.8 F |
| 10/5 | 48 F | 74 F | 61 F | 0.44" | 35.96" | 0.00" | 7.50" | 5.7 F | 1.7 F |
| 10/6 | 47 F | 74 F | 61 F | 0.54" | 36.06" | 0.00" | 7.50" | 6 F | 1.6 F |
| 10/7 | 47 F | 74 F | 60 F | 0.63" | 36.15" | 0.00" | 7.50" | 6.2 F | 1.5 F |
| 10/8 | 47 F | 73 F | 60 F | 0.73" | 36.25" | 0.00" | 7.50" | 6.5 F | 1.4 F |
| 10/9 | 46 F | 73 F | 60 F | 0.81" | 36.33" | 0.00" | 7.50" | 6.8 F | 1.3 F |
| 10/10 | 46 F | 72 F | 59 F | 0.90" | 36.42" | 0.00" | 7.50" | 7 F | 1.2 F |
| 10/11 | 46 F | 72 F | 59 F | 0.99" | 36.51" | 0.00" | 7.50" | 7.3 F | 1.1 F |
| 10/12 | 45 F | 72 F | 59 F | 1.08" | 36.60" | 0.00" | 7.50" | 7.5 F | 1 F |
| 10/13 | 45 F | 71 F | 58 F | 1.18" | 36.70" | 0.00" | 7.50" | 7.8 F | 0.9 F |
| 10/14 | 45 F | 71 F | 58 F | 1.27" | 36.79" | 0.00" | 7.50" | 8 F | 0.8 F |
| 10/15 | 44 F | 71 F | 57 F | 1.37" | 36.89" | 0.00" | 7.50" | 8.2 F | 0.7 F |
| 10/16 | 44 F | 70 F | 57 F | 1.48" | 37.00" | 0.00" | 7.50" | 8.5 F | 0.6 F |
| 10/17 | 44 F | 70 F | 57 F | 1.58" | 37.10" | 0.00" | 7.50" | 8.8 F | 0.6 F |
| 10/18 | 44 F | 69 F | 56 F | 1.69" | 37.21" | 0.00" | 7.50" | 9.1 F | 0.5 F |
| 10/19 | 43 F | 69 F | 56 F | 1.81" | 37.33" | 0.00" | 7.50" | 9.5 F | 0.5 F |
| 10/20 | 43 F | 69 F | 56 F | 1.93" | 37.45" | 0.00" | 7.50" | 9.8 F | 0.5 F |
| 10/21 | 43 F | 68 F | 55 F | 2.05" | 37.57" | 0.00" | 7.50" | 10.2 F | 0.5 F |
| 10/22 | 42 F | 68 F | 55 F | 2.17" | 37.69" | 0.00" | 7.50" | 10.5 F | 0.5 F |
| 10/23 | 42 F | 67 F | 55 F | 2.30" | 37.82" | 0.00" | 7.50" | 10.9 F | 0.5 F |
| 10/24 | 42 F | 67 F | 54 F | 2.42" | 37.94" | 0.00" | 7.50" | 11.2 F | 0.4 F |
| 10/25 | 41 F | 66 F | 54 F | 2.55" | 38.07" | 0.00" | 7.50" | 11.6 F | 0.4 F |
| 10/26 | 41 F | 66 F | 54 F | 2.68" | 38.20" | 0.00" | 7.50" | 11.9 F | 0.4 F |
| 10/27 | 41 F | 65 F | 53 F | 2.80" | 38.32" | 0.00" | 7.50" | 12.3 F | 0.4 F |
| 10/28 | 41 F | 65 F | 53 F | 2.94" | 38.46" | 0.00" | 7.50" | 12.6 F | 0.4 F |
| 10/29 | 40 F | 65 F | 52 F | 3.07" | 38.59" | 0.00" | 7.50" | 13 F | 0.4 F |
| 10/30 | 40 F | 64 F | 52 F | 3.20" | 38.72" | 0.00" | 7.50" | 13.4 F | 0.3 F |
| 10/31 | 40 F | 64 F | 52 F | 3.34" | 38.86" | 0.00" | 7.50" | 13.8 F | 0.3 F |
