Whiteside County, IL
: September 2026 so far averaged 69.1°F in Whiteside County, IL, the warmest 1 to 29 September in the county average since 2019, tied 5th warmest of 76 (with 1978) (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 77.2°F
- Warmest since 2025
- 20th warmest of 76
- Low
- 48.4°F
- Warmest since 2025
- 33rd warmest of 76
No measurable precipitation in the county average of Whiteside County, IL for 6 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 59.2 to 81.2°F
Every year as a table
Every 29 September low of the county average in Whiteside County, IL since 1951: 48.4°F in 2026; the lowest is 31.1°F, in 1984.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 77.2 | 48.4 |
| 2025 | 88 | 55.9 |
| 2024 | 80.2 | 58.2 |
| 2023 | 73.8 | 56.3 |
| 2022 | 62.2 | 37.4 |
| 2021 | 84.1 | 54.4 |
| 2020 | 63.8 | 43.7 |
| 2019 | 65.2 | 55.1 |
| 2018 | 57.1 | 38.1 |
| 2017 | 73.8 | 44.8 |
| 2016 | 63.5 | 50.4 |
| 2015 | 81.1 | 60.6 |
| 2014 | 83.2 | 54.1 |
| 2013 | 82.5 | 48.7 |
| 2012 | 72.1 | 39.5 |
| 2011 | 70.6 | 46.6 |
| 2010 | 75.3 | 45.6 |
| 2009 | 61.1 | 46.7 |
| 2008 | 71.3 | 53.7 |
| 2007 | 78.7 | 48.5 |
| 2006 | 59.7 | 41.8 |
| 2005 | 67.3 | 40 |
| 2004 | 68.4 | 40.3 |
| 2003 | 57.1 | 35 |
| 2002 | 82.1 | 55 |
| 2001 | 63.2 | 42.7 |
| 2000 | 72.7 | 44.9 |
| 1999 | 57.1 | 45.6 |
| 1998 | 79.3 | 53.7 |
| 1997 | 74.5 | 52.1 |
| 1996 | 64.8 | 47 |
| 1995 | 80.1 | 51.9 |
| 1994 | 68 | 42.4 |
| 1993 | 60 | 38.6 |
| 1992 | 59.4 | 34.5 |
| 1991 | 68.5 | 39.3 |
| 1990 | 69.7 | 48.7 |
| 1989 | 74.2 | 40.2 |
| 1988 | 74.2 | 55.8 |
| 1987 | 77.5 | 52.4 |
| 1986 | 80.9 | 64.4 |
| 1985 | 74.9 | 48.7 |
| 1984 | 53.9 | 31.1 |
| 1983 | 82.3 | 55 |
| 1982 | 78.9 | 53.3 |
| 1981 | 65 | 40 |
| 1980 | 66.5 | 45.9 |
| 1979 | 81.2 | 52.8 |
| 1978 | 69.5 | 41.9 |
| 1977 | 72.2 | 48.1 |
| 1976 | 64.2 | 46 |
| 1975 | 69.1 | 43.3 |
| 1974 | 68 | 44.7 |
| 1973 | 73.4 | 62.1 |
| 1972 | 70.2 | 41.9 |
| 1971 | 85.4 | 58.9 |
| 1970 | 71.5 | 38.8 |
| 1969 | 73.2 | 45.6 |
| 1968 | 67.6 | 47 |
| 1967 | 53.7 | 32.2 |
| 1966 | 65.5 | 51 |
| 1965 | 75.5 | 52.3 |
| 1964 | 65.6 | 35.8 |
| 1963 | 69.9 | 43.5 |
| 1962 | 66.4 | 36.2 |
| 1961 | 61.8 | 35.5 |
| 1960 | 67.4 | 48 |
| 1959 | 64.4 | 46.9 |
| 1958 | 69.4 | 41.2 |
| 1957 | 68.9 | 34.3 |
| 1956 | 76.4 | 54.4 |
| 1955 | 73.4 | 53.3 |
| 1954 | 78.1 | 61.2 |
| 1953 | 93.9 | 58 |
| 1952 | 83 | 52.1 |
| 1951 | 58.7 | 32.3 |
The month
August 2026 averaged 72.4°F in Whiteside County, IL, the warmest August in the county average since 2023, tied 42nd warmest of 132 (with 2023, 2020, 2002 and 2 other years) (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 77.2°F averaged over Whiteside County, IL, the warmest 29 September in the county average since 2025, 20th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 48.4°F averaged over Whiteside County, IL, the warmest 29 September night in the county average since 2025, 33rd warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Moline, IL 37.9 mi, the nearest city with its own station