Joliet, Sunday, 9 August, 07:21
Mostly clear. Feels like 69°. High 86°, low 64°.
In January, Joliet, IL averages a high of 30.6° and a low of 16.2°. About 2.0 inches of precipitation fall over the month (9 wet days). The record high is 64.8° (2008) and the record low -28.8° (1994). Normals are computed over the last 60 years.
| Day | High | Low | Chance of precip. | Record high | Record low |
|---|---|---|---|---|---|
| 1 | 32.2° | 18.3° | 28% | 54.9° (2011) | -15.9° (1964) |
| 2 | 31.8° | 18.1° | 32% | 60.8° (2000) | -13.9° (2018) |
| 3 | 31.8° | 18.7° | 25% | 57.6° (2004) | -15.3° (2014) |
| 4 | 30.9° | 16.7° | 28% | 61.7° (1997) | -12.3° (1969) |
| 5 | 29.8° | 15.3° | 22% | 54.5° (1998) | -22° (1999) |
| 6 | 29.3° | 17.2° | 32% | 59.2° (2008) | -18.8° (2014) |
| 7 | 28.8° | 14.5° | 18% | 64.8° (2008) | -14.8° (1968) |
| 8 | 28.9° | 13.1° | 25% | 60.3° (1965) | -16.2° (1968) |
| 9 | 29.7° | 15.4° | 30% | 52.2° (2002) | -12.5° (1962) |
| 10 | 30.2° | 15.4° | 37% | 59.5° (1975) | -23.8° (1982) |
| 11 | 31.6° | 16.9° | 30% | 57° (2018) | -20.4° (1979) |
| 12 | 31.8° | 18.1° | 27% | 61.2° (2005) | -11° (1997) |
| 13 | 31.3° | 16.7° | 37% | 57.9° (2005) | -9.8° (1977) |
| 14 | 28.8° | 15.8° | 27% | 48.2° (2016) | -13.5° (2024) |
| 15 | 27.5° | 14° | 22% | 50.7° (1990) | -18.6° (1994) |
| 16 | 30.7° | 15.1° | 22% | 56.7° (1990) | -24.2° (2009) |
| 17 | 30.4° | 16.2° | 33% | 54.9° (1990) | -28.1° (1982) |
| 18 | 29.3° | 15.3° | 20% | 58.1° (1996) | -26.5° (1994) |
| 19 | 29.5° | 13.6° | 27% | 55.4° (2006) | -28.8° (1994) |
| 20 | 28.6° | 14.4° | 25% | 49.5° (2006) | -26.9° (1985) |
| 21 | 29.8° | 16° | 23% | 60.1° (2017) | -23.6° (1963) |
| 22 | 33.4° | 17.4° | 33% | 58.1° (1964) | -18.2° (1970) |
| 23 | 32.4° | 18.5° | 33% | 58.6° (1967) | -19.1° (1963) |
| 24 | 31.6° | 17.1° | 25% | 61.9° (1967) | -14.8° (1963) |
| 25 | 31.8° | 17.1° | 37% | 57.9° (1967) | -14.4° (1963) |
| 26 | 30.6° | 14.9° | 32% | 52.9° (1989) | -16.2° (2019) |
| 27 | 30.4° | 15.4° | 25% | 56.5° (2002) | -9.8° (1988) |
| 28 | 31.1° | 15.8° | 28% | 57.4° (2002) | -25.8° (1963) |
| 29 | 31.5° | 16.7° | 32% | 58.8° (2013) | -20.7° (1966) |
| 30 | 30.4° | 16.7° | 23% | 58.5° (1988) | -25.4° (2019) |
| 31 | 32.2° | 16.7° | 25% | 62.2° (1989) | -27.2° (2019) |