Harwood Heights, Sunday, 9 August, 12:27
Mostly clear. Feels like 92°. High 85°, low 63°.
In December, Harwood Heights, IL averages a high of 35.4° and a low of 24.4°. About 2.7 inches of precipitation fall over the month (10 wet days). The record high is 66.6° (2012) and the record low -19.8° (1983). Normals are computed over the last 60 years.
| Day | High | Low | Chance of precip. | Record high | Record low |
|---|---|---|---|---|---|
| 1 | 38.7° | 28.8° | 42% | 62.8° (1970) | 8.8° (2025) |
| 2 | 39.7° | 28.8° | 33% | 65.5° (1982) | 9.3° (1976) |
| 3 | 39.2° | 28.9° | 33% | 66.6° (2012) | 9.1° (2006) |
| 4 | 38.5° | 28.2° | 30% | 63.1° (1998) | 0.7° (1991) |
| 5 | 38.8° | 27.1° | 32% | 65.3° (2001) | 0.3° (1991) |
| 6 | 36.9° | 25.9° | 27% | 60.3° (1998) | 6.3° (1972) |
| 7 | 35.2° | 26.1° | 27% | 55.4° (1980) | 3.7° (1972) |
| 8 | 36.1° | 26.8° | 27% | 60.8° (1991) | 3.7° (2006) |
| 9 | 36.7° | 25.5° | 40% | 53.8° (2023) | -3.5° (1995) |
| 10 | 35.8° | 24.8° | 32% | 57° (2015) | -3.1° (1978) |
| 11 | 34.9° | 24.4° | 32% | 58.6° (2021) | -5.8° (1972) |
| 12 | 36.7° | 24.4° | 30% | 57.9° (1991) | -2.2° (2013) |
| 13 | 36.5° | 24.6° | 23% | 60.6° (2015) | -5.1° (2000) |
| 14 | 36.5° | 26.2° | 33% | 61.7° (1975) | -6.7° (1985) |
| 15 | 37.6° | 25.9° | 33% | 66° (2021) | -2.9° (2016) |
| 16 | 35.8° | 25° | 37% | 63.7° (2021) | 0.1° (1989) |
| 17 | 32.9° | 23.4° | 22% | 54.1° (2006) | -2° (1972) |
| 18 | 32.9° | 21.9° | 22% | 53.2° (2002) | -5.1° (1985) |
| 19 | 34° | 23° | 23% | 51.8° (2002) | -10.1° (2016) |
| 20 | 33.8° | 23.2° | 30% | 56.8° (1988) | -6.3° (1963) |
| 21 | 33.8° | 22.8° | 33% | 57° (1967) | -11.7° (1989) |
| 22 | 34.2° | 22.5° | 33% | 50° (2019) | -10.5° (1983) |
| 23 | 34.7° | 23° | 38% | 58.5° (2015) | -14.4° (1983) |
| 24 | 32.9° | 21° | 35% | 58.6° (2023) | -19.8° (1983) |
| 25 | 31.5° | 20.5° | 28% | 59.4° (1982) | -14.4° (1983) |
| 26 | 32.7° | 20.7° | 35% | 61.7° (2019) | -10.3° (1983) |
| 27 | 34.2° | 23° | 30% | 59.5° (2008) | -2.7° (2017) |
| 28 | 35.6° | 23.9° | 33% | 61.3° (1984) | -2.9° (1961) |
| 29 | 34.3° | 23.7° | 35% | 61.2° (1984) | -6.2° (1983) |
| 30 | 33.4° | 21.9° | 30% | 56.1° (2002) | -9.8° (1983) |
| 31 | 33.1° | 21.6° | 38% | 57.6° (1965) | -8.1° (1968) |