Weather on September 20
Elgin, IL
55 Years of Data
Avg High
75°F
Avg Low
53°F
Warmest
1978
79°F avg
Coldest
1991
45°F avg
About This Date
September 20th in Elgin, IL typically brings pleasant fall weather, with average highs around 75°F and lows near 53°F. Over 54 years of records, the warmest September 20th was in 1978 (79°F average), while the coldest was 1991 (45°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 43% of September 20th dates historically, with the wettest September 20th recording 1.73" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for September 20th in Elgin, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 88° | 64° | 76° | 0.25" | — |
| 2024 | 89° | 56° | 72° | 0.46" | — |
| 2023 | 65° | 55° | 60° | 1.73" | — |
| 2022 | 81° | 58° | 69° | — | — |
| 2021 | 90° | 59° | 74° | — | — |
| 2020 | 62° | 42° | 52° | — | — |
| 2019 | 82° | 58° | 70° | 0.38" | — |
| 2018 | 76° | 64° | 70° | 0.41" | — |
| 2017 | 78° | 58° | 68° | 0.58" | — |
| 2016 | 87° | 56° | 71° | — | — |
| 2015 | 71° | 47° | 59° | — | — |
| 2014 | 74° | 50° | 62° | — | — |
| 2013 | 88° | 65° | 76° | 0.41" | — |
| 2012 | 72° | 40° | 56° | — | — |
| 2011 | 71° | 48° | 60° | — | — |
| 2010 | 66° | 53° | 60° | — | — |
| 2009 | 78° | 51° | 65° | — | — |
| 2008 | 78° | 55° | 67° | — | — |
| 2007 | 89° | 55° | 72° | — | — |
| 2006 | 54° | 40° | 47° | 0.03" | — |
| 2005 | 83° | 56° | 69° | 0.2" | — |
| 2004 | 79° | 55° | 67° | — | — |
| 2003 | 68° | 41° | 55° | — | — |
| 2002 | 79° | 71° | 75° | 0.66" | — |
| 2001 | 64° | 53° | 59° | 0.38" | — |
| 2000 | 85° | 60° | 72° | 0.13" | — |
| 1999 | 79° | 49° | 64° | 0.43" | — |
| 1998 | 86° | 60° | 73° | — | — |
| 1997 | 84° | 57° | 71° | 1.37" | — |
| 1996 | 74° | 48° | 61° | — | — |
| 1995 | 63° | 55° | 59° | 0.25" | — |
| 1994 | 83° | 54° | 68° | — | — |
| 1993 | 65° | 50° | 57° | 0.05" | — |
| 1992 | 63° | 44° | 53° | — | — |
| 1991coldest | 55° | 36° | 45° | — | — |
| 1990 | 62° | 44° | 53° | — | — |
| 1989 | 76° | 50° | 63° | — | — |
| 1988 | 74° | 55° | 64° | 0.61" | — |
| 1987 | 68° | 49° | 58° | 0.08" | — |
| 1986 | 71° | 59° | 65° | 0.05" | — |
| 1985 | — | 62° | — | — | — |
| 1984 | 86° | 57° | 72° | — | — |
| 1983 | 84° | 60° | 72° | — | — |
| 1982 | 70° | 42° | 56° | 0.64" | — |
| 1981 | — | 47° | — | — | — |
| 1980 | 78° | 53° | 66° | 0.13" | — |
| 1979 | 68° | 42° | 55° | — | — |
| 1978warmest | 89° | 68° | 79° | — | — |
| 1977 | 65° | 47° | 56° | — | — |
| 1976 | 82° | 54° | 68° | — | — |
| 1975 | 69° | 44° | 57° | 0.03" | — |
| 1974 | 62° | 51° | 57° | 0.1" | — |
| 1973 | 65° | 46° | 55° | — | — |
| 1971 | 60° | 48° | 54° | — | — |
54 years of data from ELGIN WATER