Rockford, Sunday, 9 August, 06:02
Partly cloudy. Feels like 62°. High 82°, low 62°.
In May, Rockford, IL averages a high of 68.7° and a low of 50.3°. About 3.9 inches of precipitation fall over the month (12 wet days). The record high is 91.9° (2025) and the record low 25.9° (1966). Normals are computed over the last 60 years.
| Day | High | Low | Chance of precip. | Record high | Record low |
|---|---|---|---|---|---|
| 1 | 63° | 45.3° | 40% | 79.9° (2013) | 28.6° (1978) |
| 2 | 62.6° | 45.3° | 38% | 79.2° (2021) | 27.7° (1966) |
| 3 | 62.4° | 44.4° | 38% | 80.2° (2012) | 30° (1967) |
| 4 | 64.2° | 44.4° | 35% | 80.2° (1980) | 28.8° (2005) |
| 5 | 65.8° | 46.9° | 40% | 82.2° (1980) | 34.7° (1992) |
| 6 | 66.4° | 46.6° | 35% | 80.8° (2004) | 32.9° (1989) |
| 7 | 65.7° | 47.5° | 37% | 81.7° (2023) | 30.4° (1989) |
| 8 | 66.4° | 47.7° | 38% | 82.2° (1979) | 30.6° (1976) |
| 9 | 66.7° | 48.6° | 37% | 82.6° (1963) | 28° (2020) |
| 10 | 67.6° | 47.7° | 35% | 87.8° (2022) | 25.9° (1966) |
| 11 | 67.3° | 49.5° | 45% | 85.1° (2022) | 34.2° (2021) |
| 12 | 66° | 48.6° | 43% | 87.4° (2022) | 31.3° (1981) |
| 13 | 66.6° | 47.8° | 48% | 84.9° (2022) | 33.1° (2013) |
| 14 | 67.3° | 49.1° | 48% | 85.1° (1991) | 38.5° (1973) |
| 15 | 68.2° | 50.5° | 45% | 91.9° (2025) | 34.9° (2016) |
| 16 | 69.8° | 49.8° | 37% | 86.4° (2025) | 35.2° (1997) |
| 17 | 69.4° | 50.2° | 30% | 85.3° (1962) | 36.9° (2014) |
| 18 | 69.6° | 51.3° | 38% | 87.1° (1962) | 32.7° (2002) |
| 19 | 70.7° | 52.2° | 37% | 86.4° (1962) | 37.2° (2002) |
| 20 | 70.9° | 52.3° | 30% | 85.5° (1977) | 36.9° (2002) |
| 21 | 70.3° | 51.6° | 28% | 85.3° (1977) | 34.7° (2002) |
| 22 | 71.4° | 52° | 33% | 85.5° (1975) | 38.7° (1997) |
| 23 | 71.2° | 53.4° | 42% | 85.8° (1975) | 33.6° (1963) |
| 24 | 71.4° | 53.4° | 32% | 87.6° (2010) | 39.2° (1992) |
| 25 | 70.2° | 53.4° | 53% | 85.8° (1977) | 37.9° (1992) |
| 26 | 71.8° | 53.8° | 42% | 88.3° (1985) | 37.8° (1961) |
| 27 | 72.1° | 53.8° | 40% | 91° (2012) | 34.5° (1992) |
| 28 | 72.5° | 55° | 43% | 88.3° (2012) | 38.5° (1971) |
| 29 | 73.8° | 55.4° | 50% | 87.1° (1991) | 37.8° (1965) |
| 30 | 74.8° | 56.1° | 35% | 89.8° (2023) | 36.7° (1984) |
| 31 | 73.9° | 56.7° | 40% | 90° (2023) | 40.1° (1972) |