Johnson County, IA
: September 2026 so far brought 7.25 in of precipitation in Johnson County, IA, the wettest 1 to 29 September in the county average since 2018, 6th wettest of 76 (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 78°F
- Warmest since 2025
- 17th warmest of 76
- Low
- 49.7°F
- Warmest since 2025
- 26th warmest of 76
No measurable precipitation in the county average of Johnson County, IA for 1 day to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 58.7 to 80.1°F
Every year as a table
Every 29 September low of the county average in Johnson County, IA since 1951: 49.7°F in 2026; the lowest is 30.4°F, in 1984.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 78 | 49.7 |
| 2025 | 86.4 | 54.5 |
| 2024 | 82.5 | 55.9 |
| 2023 | 77.1 | 59.8 |
| 2022 | 62.5 | 34.2 |
| 2021 | 83.9 | 55.3 |
| 2020 | 60.7 | 45.1 |
| 2019 | 65.4 | 54.9 |
| 2018 | 52.3 | 39.4 |
| 2017 | 75.1 | 43.6 |
| 2016 | 65.8 | 49.6 |
| 2015 | 82.3 | 56.7 |
| 2014 | 81.9 | 53.5 |
| 2013 | 74.6 | 43.6 |
| 2012 | 71.5 | 37.2 |
| 2011 | 68.9 | 49.4 |
| 2010 | 74.3 | 46.6 |
| 2009 | 60.9 | 45.3 |
| 2008 | 74 | 53.2 |
| 2007 | 76.1 | 46.7 |
| 2006 | 60.7 | 41.3 |
| 2005 | 63.5 | 38.3 |
| 2004 | 69 | 38.3 |
| 2003 | 56.8 | 32.3 |
| 2002 | 77.6 | 50 |
| 2001 | 67.5 | 42.1 |
| 2000 | 72.9 | 47.7 |
| 1999 | 58.8 | 44.4 |
| 1998 | 80.1 | 55.3 |
| 1997 | 76.2 | 53.3 |
| 1996 | 67 | 46.9 |
| 1995 | 80.3 | 51.2 |
| 1994 | 69.4 | 42.2 |
| 1993 | 63.6 | 37 |
| 1992 | 58.2 | 34.4 |
| 1991 | 69.6 | 38.4 |
| 1990 | 72.9 | 49.5 |
| 1989 | 76.3 | 40.4 |
| 1988 | 70.2 | 57.8 |
| 1987 | 73.4 | 53.2 |
| 1986 | 79.5 | 61.2 |
| 1985 | 67.1 | 46.7 |
| 1984 | 53.2 | 30.4 |
| 1983 | 83.4 | 56.3 |
| 1982 | 78.9 | 54.9 |
| 1981 | 67.2 | 39.5 |
| 1980 | 75.8 | 47.1 |
| 1979 | 82.8 | 54.2 |
| 1978 | 68.2 | 41.4 |
| 1977 | 72 | 46 |
| 1976 | 62.1 | 47.3 |
| 1975 | 64.1 | 48 |
| 1974 | 64.7 | 42.5 |
| 1973 | 70.7 | 61.4 |
| 1972 | 72.5 | 39.7 |
| 1971 | 87.5 | 58.3 |
| 1970 | 70.3 | 38.8 |
| 1969 | 73.5 | 45.4 |
| 1968 | 66.1 | 46.5 |
| 1967 | 57 | 31.9 |
| 1966 | 68.6 | 46 |
| 1965 | 76 | 54.3 |
| 1964 | 65.4 | 33.9 |
| 1963 | 76.3 | 46 |
| 1962 | 68.1 | 36.8 |
| 1961 | 61.6 | 34.4 |
| 1960 | 68.9 | 44.8 |
| 1959 | 65.3 | 43.9 |
| 1958 | 71.2 | 42.3 |
| 1957 | 69.2 | 33.7 |
| 1956 | 79.4 | 49.4 |
| 1955 | 76.3 | 53.2 |
| 1954 | 79.7 | 60.2 |
| 1953 | 94.7 | 58.2 |
| 1952 | 85.5 | 50.2 |
| 1951 | 58.2 | 32.6 |
The month
September 2026 so far averaged 69.3°F in Johnson County, IA, the warmest 1 to 29 September in the county average since 2019, 3rd warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
The month in words
- August 2026 averaged 73.1°F in Johnson County, IA, the warmest August in the county average since 2021, tied 33rd warmest of 132 (with 2001, 2000, 1991 and 2 other years) (county average from NOAA's monthly county data, 1895 to 2026).
- Tuesday 29 September 2026: a high of 78°F averaged over Johnson County, IA, the warmest 29 September in the county average since 2025, 17th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 49.7°F averaged over Johnson County, IA, the warmest 29 September night in the county average since 2025, 26th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Cedar Rapids, IA 16.2 mi, the nearest city with its own station