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What is Byron, IL, Weather Like in October?
During the month of October, Byron, IL,
has an average daytime high temperature of 63°F and an average overnight low temperature dropping to 42°F.
Around 2.63 inches of precipitation is received during the month,
with about 33.04 inches falling in a typical year.
0.20 inches of snow is the mean amount received during October.
Annually, Byron receives around 25.40 inches of snow.
October 2025: Actual vs. Average Temperatures
Showing temperatures through today (October 18, 2025)
Actual High
Average High
Actual Low
Average Low
Actual data from: KRFD
Byron, IL Daily Weather Averages for October
Recorded at Rockford Gtr Rockford Ap
(usw00094822),
9.5 miles
ENE of
Byron, 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 | 69 F | 58 F | 0.10" | 30.51" | 0.00" | 25.20" | 7.8 F | 1 F |
| 10/2 | 47 F | 69 F | 58 F | 0.19" | 30.60" | 0.00" | 25.20" | 8.1 F | 0.9 F |
| 10/3 | 46 F | 68 F | 57 F | 0.29" | 30.70" | 0.00" | 25.20" | 8.4 F | 0.8 F |
| 10/4 | 46 F | 68 F | 57 F | 0.38" | 30.79" | 0.00" | 25.20" | 8.8 F | 0.8 F |
| 10/5 | 46 F | 68 F | 57 F | 0.47" | 30.88" | 0.00" | 25.20" | 9.2 F | 0.7 F |
| 10/6 | 45 F | 67 F | 56 F | 0.55" | 30.96" | 0.00" | 25.20" | 9.5 F | 0.7 F |
| 10/7 | 45 F | 67 F | 56 F | 0.63" | 31.04" | 0.00" | 25.20" | 9.9 F | 0.6 F |
| 10/8 | 45 F | 66 F | 55 F | 0.71" | 31.12" | 0.00" | 25.20" | 10.2 F | 0.6 F |
| 10/9 | 44 F | 66 F | 55 F | 0.80" | 31.21" | 0.00" | 25.20" | 10.6 F | 0.5 F |
| 10/10 | 44 F | 65 F | 55 F | 0.89" | 31.30" | 0.00" | 25.20" | 11 F | 0.5 F |
| 10/11 | 44 F | 65 F | 54 F | 0.97" | 31.38" | 0.00" | 25.20" | 11.3 F | 0.4 F |
| 10/12 | 43 F | 64 F | 54 F | 1.05" | 31.46" | 0.00" | 25.20" | 11.7 F | 0.4 F |
| 10/13 | 43 F | 64 F | 53 F | 1.13" | 31.54" | 0.00" | 25.20" | 12 F | 0.3 F |
| 10/14 | 42 F | 63 F | 53 F | 1.21" | 31.62" | 0.00" | 25.20" | 12.4 F | 0.3 F |
| 10/15 | 42 F | 63 F | 53 F | 1.30" | 31.71" | 0.00" | 25.20" | 12.8 F | 0.2 F |
| 10/16 | 42 F | 62 F | 52 F | 1.38" | 31.79" | 0.00" | 25.20" | 13.1 F | 0.2 F |
| 10/17 | 41 F | 62 F | 52 F | 1.46" | 31.87" | 0.00" | 25.20" | 13.5 F | 0.2 F |
| 10/18 | 41 F | 61 F | 51 F | 1.55" | 31.96" | 0.00" | 25.20" | 13.9 F | 0.2 F |
| 10/19 | 41 F | 61 F | 51 F | 1.63" | 32.04" | 0.00" | 25.20" | 14.3 F | 0.2 F |
| 10/20 | 40 F | 61 F | 50 F | 1.71" | 32.12" | 0.00" | 25.20" | 14.7 F | 0.1 F |
| 10/21 | 40 F | 60 F | 50 F | 1.79" | 32.20" | 0.00" | 25.20" | 15.1 F | 0.1 F |
| 10/22 | 40 F | 60 F | 50 F | 1.88" | 32.29" | 0.10" | 25.30" | 15.5 F | 0.1 F |
| 10/23 | 39 F | 59 F | 49 F | 1.96" | 32.37" | 0.10" | 25.30" | 15.9 F | 0.1 F |
| 10/24 | 39 F | 59 F | 49 F | 2.04" | 32.45" | 0.10" | 25.30" | 16.3 F | 0.1 F |
| 10/25 | 39 F | 58 F | 48 F | 2.12" | 32.53" | 0.10" | 25.30" | 16.7 F | 0.1 F |
| 10/26 | 38 F | 58 F | 48 F | 2.21" | 32.62" | 0.10" | 25.30" | 17.1 F | 0.1 F |
| 10/27 | 38 F | 57 F | 48 F | 2.30" | 32.71" | 0.10" | 25.30" | 17.6 F | 0.1 F |
| 10/28 | 38 F | 57 F | 47 F | 2.38" | 32.79" | 0.10" | 25.30" | 18 F | 0.1 F |
| 10/29 | 37 F | 56 F | 47 F | 2.47" | 32.88" | 0.20" | 25.40" | 18.4 F | N/A |
| 10/30 | 37 F | 56 F | 46 F | 2.55" | 32.96" | 0.20" | 25.40" | 18.8 F | N/A |
| 10/31 | 37 F | 55 F | 46 F | 2.63" | 33.04" | 0.20" | 25.40" | 19.3 F | N/A |
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