January weather in Prospect Heights, IL
The average temperature in Prospect Heights in January is 25.1°F (18.4°F–31.9°F). Average precipitation: 1.33 inches.
January is a winter month in Prospect Heights, and is cooler than the annual average of 50.8°F. Daily temperatures swing about 13.5°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 15m. For travel, January is cold.
Avg High
31.9°F
Avg Low
18.4°F
Precipitation
1.33 in
Daylight
9h 15m
January records in Prospect Heights
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 48.0°F (2004) | -7.8°F (2018) | 0.41 in (2021) |
| January 2 | 61.0°F (2000) | -5.8°F (2018) | 0.15 in (2006) |
| January 3 | 57.9°F (1998) | -6.9°F (2014) | 0.83 in (2023) |
| January 4 | 64.0°F (1997) | -9.0°F (1999) | 0.35 in (2004) |
| January 5 | 55.9°F (1998) | -16.1°F (1999) | 0.40 in (2005) |
| January 6 | 61.0°F (2008) | -14.8°F (2014) | 0.22 in (2005) |
| January 7 | 64.9°F (2008) | -10.8°F (2014) | 0.43 in (2019) |
| January 8 | 60.1°F (2026) | -7.8°F (2014) | 1.05 in (2026) |
| January 9 | 60.1°F (2026) | -7.8°F (2014) | 0.78 in (2024) |
| January 10 | 55.9°F (2018) | -2.9°F (1999) | 1.17 in (2014) |
| January 11 | 59.0°F (2018) | -4.0°F (1999) | 0.37 in (2005) |
| January 12 | 61.0°F (2005) | -7.1°F (1997) | 0.78 in (2024) |
| January 13 | 52.0°F (2026) | -2.9°F (1997) | 0.45 in (2005) |
| January 14 | 43.0°F (2016) | -8.9°F (2024) | 0.25 in (2007) |
| January 15 | 45.0°F (2023) | -11.7°F (2009) | 0.12 in (2007) |
| January 16 | 53.1°F (2023) | -15.9°F (2009) | 0.85 in (2017) |
| January 17 | 51.1°F (2023) | -8.0°F (1997) | 0.35 in (1999) |
| January 18 | 45.0°F (2022) | -5.1°F (1997) | 0.38 in (2020) |
| January 19 | 54.0°F (2006) | -2.7°F (2008) | 0.32 in (2017) |
| January 20 | 46.0°F (2006) | -5.8°F (2008) | 0.80 in (2006) |
| January 21 | 59.0°F (2017) | -8.0°F (2025) | 0.72 in (1999) |
| January 22 | 55.0°F (2018) | -2.7°F (2013) | 0.68 in (2018) |
| January 23 | 48.0°F (2002) | -11.9°F (2026) | 0.92 in (1999) |
| January 24 | 46.0°F (2010) | -11.0°F (2026) | 0.38 in (2020) |
| January 25 | 50.0°F (2002) | -4.9°F (2008) | 0.26 in (2023) |
| January 26 | 53.1°F (2002) | -8.9°F (2019) | 0.29 in (2024) |
| January 27 | 60.1°F (2002) | -6.9°F (2014) | 0.44 in (2013) |
| January 28 | 48.9°F (2006) | -10.8°F (2014) | 0.21 in (2023) |
| January 29 | 63.0°F (2013) | -8.9°F (2019) | 1.50 in (2013) |
| January 30 | 53.1°F (2012) | -20.7°F (2019) | 0.41 in (2013) |
| January 31 | 57.9°F (2012) | -19.8°F (2019) | 1.02 in (2025) |