Monona County, IA
Tuesday : a low of 60.6°F averaged over Monona County, IA, the warmest 29 September night in the county average since 1983, tied 2nd warmest of 76 (with 1982) (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 73°F
- Warmest since 2025
- 36th warmest of 76
- Low
- 60.6°F
- Warmest since 1983
- 2nd warmest of 76
No measurable precipitation in the county average of Monona County, IA for 2 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 34.3 to 53.8°F
Every year as a table
Every 29 September high of the county average in Monona County, IA since 1951: 73°F in 2026; the highest is 91.1°F, in 2021.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 73 | 60.6 |
| 2025 | 86.1 | 47.4 |
| 2024 | 88 | 49.5 |
| 2023 | 84.6 | 49.8 |
| 2022 | 68.9 | 36.9 |
| 2021 | 91.1 | 57.6 |
| 2020 | 62.6 | 40.4 |
| 2019 | 68.8 | 46.7 |
| 2018 | 51.4 | 40.8 |
| 2017 | 75.9 | 46 |
| 2016 | 64.2 | 42.3 |
| 2015 | 80.4 | 53.6 |
| 2014 | 82.2 | 56.6 |
| 2013 | 66.6 | 44.1 |
| 2012 | 77.2 | 37.2 |
| 2011 | 85.7 | 45.8 |
| 2010 | 76.6 | 50.3 |
| 2009 | 64 | 36.6 |
| 2008 | 76.2 | 50.1 |
| 2007 | 77.5 | 42.1 |
| 2006 | 58.9 | 38.8 |
| 2005 | 62.4 | 33.4 |
| 2004 | 70.6 | 38.5 |
| 2003 | 59.2 | 33.2 |
| 2002 | 71.4 | 50.5 |
| 2001 | 76.5 | 44.1 |
| 2000 | 82.3 | 47 |
| 1999 | 66.4 | 35.1 |
| 1998 | 84.6 | 55.6 |
| 1997 | 75.8 | 49.7 |
| 1996 | 68.8 | 42.1 |
| 1995 | 82.7 | 55.2 |
| 1994 | 73.9 | 41.5 |
| 1993 | 65.5 | 33.7 |
| 1992 | 59.8 | 34.4 |
| 1991 | 74.8 | 39.7 |
| 1990 | 69.1 | 48.3 |
| 1989 | 79.4 | 44.9 |
| 1988 | 66.1 | 57.8 |
| 1987 | 74.4 | 50.5 |
| 1986 | 81.3 | 53.7 |
| 1985 | 43.4 | 36.5 |
| 1984 | 51.3 | 27.6 |
| 1983 | 82 | 63.6 |
| 1982 | 78.1 | 60.6 |
| 1981 | 75.6 | 44.3 |
| 1980 | 78.4 | 52 |
| 1979 | 73.5 | 44.3 |
| 1978 | 73.5 | 48.1 |
| 1977 | 72.4 | 50.9 |
| 1976 | 63.6 | 38 |
| 1975 | 67.7 | 38.6 |
| 1974 | 64.5 | 32.8 |
| 1973 | 65.4 | 54.3 |
| 1972 | 60.9 | 34.8 |
| 1971 | 78 | 49.9 |
| 1970 | 80.6 | 42.6 |
| 1969 | 76.4 | 51.6 |
| 1968 | 67.4 | 49.2 |
| 1967 | 64.9 | 30.6 |
| 1966 | 64.6 | 46.3 |
| 1965 | 69.2 | 48.8 |
| 1964 | 69 | 35.8 |
| 1963 | 70.7 | 42.1 |
| 1962 | 67 | 42.2 |
| 1961 | 64 | 39.8 |
| 1960 | 69.9 | 46.8 |
| 1959 | 55.6 | 37 |
| 1958 | 74.2 | 47.8 |
| 1957 | 74.9 | 43 |
| 1956 | 72.2 | 41.7 |
| 1955 | 72.9 | 53 |
| 1954 | 71.4 | 52.3 |
| 1953 | 85.7 | 60.5 |
| 1952 | 82.1 | 46.7 |
| 1951 | 61.9 | 40 |
The month
September 2026 so far averaged 69.3°F in Monona County, IA, the warmest 1 to 29 September in the county average since 2005, 3rd warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
The month in words
- August 2026 averaged 71.8°F in Monona County, IA, the coldest August in the county average since 2024, 64th coldest of 132 (county average from NOAA's monthly county data, 1895 to 2026).
- Tuesday 29 September 2026: a high of 73°F averaged over Monona County, IA, the warmest 29 September in the county average since 2025, 36th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Sioux City, IA 32.1 mi, the nearest city with its own station