October weather in Castlewood, SD
The average temperature in Castlewood in October is 45.8°F (33.7°F–57.8°F). Average precipitation: 2.28 inches.
October is a fall month in Castlewood, and is warmer than the annual average of 42.7°F. Daily temperatures swing about 24.1°F between overnight low and afternoon high. Daylight averages about 10h 43m. For travel, October is cool.
Avg High
57.8°F
Avg Low
33.7°F
Precipitation
2.28 in
Daylight
10h 43m
October records in Castlewood
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| October 1 | 82.9°F (2012) | 37.9°F (2018) | 0.72 in (2021) |
| October 2 | 91.0°F (2023) | 28.9°F (2012) | 1.54 in (2017) |
| October 3 | 88.0°F (2023) | 34.0°F (2012) | 0.74 in (2017) |
| October 4 | 88.0°F (2025) | 5.0°F (2016) | 1.78 in (2023) |
| October 5 | 82.0°F (2025) | 23.0°F (2018) | 1.55 in (2016) |
| October 6 | 78.1°F (2021) | 25.0°F (2012) | 0.10 in (2013) |
| October 7 | 78.1°F (2020) | 19.9°F (2012) | 0.30 in (2016) |
| October 8 | 75.0°F (2013) | 26.1°F (2012) | 0.17 in (2018) |
| October 9 | 81.0°F (2021) | 28.0°F (2016) | 0.26 in (2018) |
| October 10 | 82.9°F (2020) | 23.0°F (2014) | 0.96 in (2018) |
| October 11 | 82.0°F (2015) | 21.9°F (2012) | 0.45 in (2019) |
| October 12 | 87.1°F (2015) | 14.0°F (2012) | 0.49 in (2025) |
| October 13 | 79.0°F (2013) | 27.0°F (2016) | 1.67 in (2023) |
| October 14 | 70.0°F (2015) | 25.0°F (2024) | 0.76 in (2013) |
| October 15 | 71.1°F (2016) | 21.0°F (2018) | 2.31 in (2013) |
| October 16 | 70.0°F (2012) | 19.9°F (2018) | 0.35 in (2013) |
| October 17 | 73.9°F (2025) | 21.0°F (2022) | 0.29 in (2025) |
| October 18 | 73.9°F (2017) | 9.0°F (2022) | 0.22 in (2012) |
| October 19 | 75.0°F (2021) | 8.1°F (2022) | 1.10 in (2012) |
| October 20 | 75.9°F (2015) | 12.9°F (2022) | 0.11 in (2021) |
| October 21 | 75.0°F (2024) | 24.1°F (2018) | 0.90 in (2021) |
| October 22 | 75.9°F (2014) | 23.0°F (2018) | 0.31 in (2019) |
| October 23 | 69.1°F (2022) | 19.0°F (2018) | 0.50 in (2015) |
| October 24 | 75.9°F (2022) | 14.0°F (2020) | 0.88 in (2015) |
| October 25 | 75.9°F (2014) | 19.0°F (2020) | 0.17 in (2018) |
| October 26 | 66.0°F (2014) | 10.9°F (2020) | 0.30 in (2023) |
| October 27 | 63.0°F (2025) | 3.9°F (2020) | 0.40 in (2014) |
| October 28 | 64.0°F (2024) | 3.9°F (2020) | 1.17 in (2021) |
| October 29 | 72.0°F (2016) | 10.9°F (2017) | 0.01 in (2013) |
| October 30 | 64.0°F (2022) | 10.9°F (2023) | 0.17 in (2016) |
| October 31 | 62.1°F (2022) | 12.9°F (2019) | 0.10 in (2012) |