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What is Diagonal, IA, Weather Like in October?
During the month of October, Diagonal, IA,
has an average daytime high temperature of 65°F and an average overnight low temperature dropping to 41°F.
Around 2.88 inches of precipitation is received during the month,
with about 33.22 inches falling in a typical year.
0.30 inches of snow is the mean amount received during October.
Annually, Diagonal receives around 15.30 inches of snow.
October 2025: Actual vs. Average Temperatures
Showing temperatures through today (October 25, 2025)
Actual High
Average High
Actual Low
Average Low
Month Summary
Average High: 75.1 F
(+9.2 vs avg)
Average Low: 53.2 F
(+11.4 vs avg)
This month was significantly warmer than average.
Actual data from: MID_IA085
Diagonal, IA Daily Weather Averages for October
Recorded at Mt Ayr
(usc00135769),
8.9 miles
SE of
Diagonal, IA
| 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" | 30.45" | 0.00" | 15.00" | 7.4 F | 1.3 F |
| 10/2 | 46 F | 71 F | 58 F | 0.22" | 30.56" | 0.00" | 15.00" | 7.7 F | 1.1 F |
| 10/3 | 46 F | 70 F | 58 F | 0.33" | 30.67" | 0.00" | 15.00" | 8.1 F | 1 F |
| 10/4 | 45 F | 70 F | 58 F | 0.43" | 30.77" | 0.00" | 15.00" | 8.4 F | 0.9 F |
| 10/5 | 45 F | 69 F | 57 F | 0.53" | 30.87" | 0.00" | 15.00" | 8.7 F | 0.8 F |
| 10/6 | 44 F | 69 F | 57 F | 0.62" | 30.96" | 0.00" | 15.00" | 9.1 F | 0.8 F |
| 10/7 | 44 F | 69 F | 56 F | 0.71" | 31.05" | 0.00" | 15.00" | 9.5 F | 0.7 F |
| 10/8 | 44 F | 68 F | 56 F | 0.80" | 31.14" | 0.00" | 15.00" | 9.8 F | 0.7 F |
| 10/9 | 43 F | 68 F | 55 F | 0.90" | 31.24" | 0.00" | 15.00" | 10.2 F | 0.6 F |
| 10/10 | 43 F | 67 F | 55 F | 1.00" | 31.34" | 0.00" | 15.00" | 10.6 F | 0.6 F |
| 10/11 | 42 F | 67 F | 55 F | 1.09" | 31.43" | 0.00" | 15.00" | 11 F | 0.5 F |
| 10/12 | 42 F | 66 F | 54 F | 1.19" | 31.53" | 0.00" | 15.00" | 11.4 F | 0.4 F |
| 10/13 | 42 F | 66 F | 54 F | 1.29" | 31.63" | 0.00" | 15.00" | 11.8 F | 0.4 F |
| 10/14 | 41 F | 65 F | 53 F | 1.39" | 31.73" | 0.00" | 15.00" | 12.2 F | 0.3 F |
| 10/15 | 41 F | 65 F | 53 F | 1.48" | 31.82" | 0.10" | 15.10" | 12.5 F | 0.2 F |
| 10/16 | 40 F | 64 F | 52 F | 1.58" | 31.92" | 0.10" | 15.10" | 13 F | 0.2 F |
| 10/17 | 40 F | 64 F | 52 F | 1.67" | 32.01" | 0.10" | 15.10" | 13.4 F | 0.2 F |
| 10/18 | 39 F | 63 F | 51 F | 1.77" | 32.11" | 0.10" | 15.10" | 13.9 F | 0.2 F |
| 10/19 | 39 F | 63 F | 51 F | 1.86" | 32.20" | 0.10" | 15.10" | 14.3 F | 0.1 F |
| 10/20 | 39 F | 62 F | 50 F | 1.96" | 32.30" | 0.10" | 15.10" | 14.8 F | 0.1 F |
| 10/21 | 38 F | 62 F | 50 F | 2.06" | 32.40" | 0.10" | 15.10" | 15.2 F | 0.1 F |
| 10/22 | 38 F | 61 F | 49 F | 2.15" | 32.49" | 0.10" | 15.10" | 15.7 F | 0.1 F |
| 10/23 | 37 F | 61 F | 49 F | 2.24" | 32.58" | 0.20" | 15.20" | 16.1 F | 0.1 F |
| 10/24 | 37 F | 60 F | 49 F | 2.32" | 32.66" | 0.20" | 15.20" | 16.6 F | 0.1 F |
| 10/25 | 36 F | 60 F | 48 F | 2.40" | 32.74" | 0.20" | 15.20" | 17 F | 0.1 F |
| 10/26 | 36 F | 59 F | 48 F | 2.48" | 32.82" | 0.20" | 15.20" | 17.5 F | 0.1 F |
| 10/27 | 36 F | 59 F | 47 F | 2.56" | 32.90" | 0.20" | 15.20" | 18 F | 0.1 F |
| 10/28 | 35 F | 58 F | 47 F | 2.64" | 32.98" | 0.20" | 15.20" | 18.4 F | N/A |
| 10/29 | 35 F | 58 F | 46 F | 2.72" | 33.06" | 0.30" | 15.30" | 18.9 F | N/A |
| 10/30 | 34 F | 57 F | 46 F | 2.80" | 33.14" | 0.30" | 15.30" | 19.3 F | N/A |
| 10/31 | 34 F | 57 F | 45 F | 2.88" | 33.22" | 0.30" | 15.30" | 19.8 F | N/A |
