January weather in Castlewood, SD
The average temperature in Castlewood in January is 12.0°F (2.5°F–21.5°F). Average precipitation: 0.52 inches.
January is a winter month in Castlewood, and is cooler than the annual average of 42.7°F. Daily temperatures swing about 19°F between overnight low and afternoon high. Daylight averages about 8h 59m. For travel, January is cold.
Avg High
21.5°F
Avg Low
2.5°F
Precipitation
0.52 in
Daylight
8h 59m
January records in Castlewood
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 35.1°F (2012) | -26.0°F (2018) | 0.06 in (2022) |
| January 2 | 34.0°F (2020) | -27.0°F (2014) | 0.00 in (2012) |
| January 3 | 32.0°F (2020) | -27.0°F (2014) | 0.01 in (2020) |
| January 4 | 37.0°F (2019) | -9.9°F (2015) | 0.26 in (2023) |
| January 5 | 48.0°F (2012) | -18.0°F (2014) | 0.01 in (2022) |
| January 6 | 57.9°F (2012) | -25.1°F (2014) | 0.10 in (2024) |
| January 7 | 45.0°F (2012) | -24.0°F (2014) | 0.09 in (2021) |
| January 8 | 45.0°F (2026) | -18.0°F (2017) | 0.01 in (2016) |
| January 9 | 37.9°F (2012) | -7.1°F (2014) | 0.28 in (2024) |
| January 10 | 48.0°F (2012) | -16.1°F (2016) | 0.09 in (2017) |
| January 11 | 53.1°F (2012) | -14.1°F (2020) | 0.25 in (2013) |
| January 12 | 39.9°F (2022) | -16.1°F (2020) | 0.07 in (2025) |
| January 13 | 45.0°F (2026) | -17.0°F (2015) | 0.00 in (2012) |
| January 14 | 46.9°F (2021) | -20.9°F (2024) | 0.27 in (2021) |
| January 15 | 34.0°F (2016) | -16.1°F (2024) | 0.26 in (2022) |
| January 16 | 39.0°F (2026) | -18.9°F (2020) | 0.02 in (2026) |
| January 17 | 37.0°F (2025) | -20.0°F (2020) | 0.02 in (2026) |
| January 18 | 37.0°F (2025) | -6.0°F (2014) | 0.16 in (2020) |
| January 19 | 42.1°F (2015) | -18.9°F (2019) | 0.29 in (2019) |
| January 20 | 46.0°F (2018) | -20.9°F (2024) | 0.18 in (2015) |
| January 21 | 42.1°F (2018) | -18.0°F (2014) | 0.10 in (2019) |
| January 22 | 35.1°F (2018) | -16.1°F (2025) | 0.05 in (2016) |
| January 23 | 34.0°F (2020) | -23.1°F (2026) | 0.12 in (2022) |
| January 24 | 37.9°F (2015) | -20.9°F (2026) | 0.10 in (2021) |
| January 25 | 36.0°F (2015) | -17.0°F (2026) | 0.02 in (2015) |
| January 26 | 36.0°F (2018) | -18.0°F (2026) | 0.17 in (2016) |
| January 27 | 43.0°F (2018) | -16.1°F (2014) | 0.10 in (2023) |
| January 28 | 48.0°F (2016) | -17.0°F (2014) | 0.34 in (2019) |
| January 29 | 46.9°F (2025) | -17.0°F (2014) | 0.02 in (2013) |
| January 30 | 44.1°F (2025) | -33.0°F (2019) | 0.01 in (2014) |
| January 31 | 50.0°F (2025) | -34.1°F (2019) | 0.00 in (2012) |