Clayton County, IA
: September 2026 so far averaged 66.1°F in Clayton County, IA, the warmest 1 to 29 September in the county average since 2015, 4th warmest 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
- 73.2°F
- Warmest since 2025
- 22nd warmest of 76
- Low
- 51.8°F
- Warmest since 2025
- 20th warmest of 76
No measurable precipitation in the county average of Clayton County, IA for 1 day to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 34.5 to 53°F
Every year as a table
Every 29 September high of the county average in Clayton County, IA since 1951: 73.2°F in 2026; the highest is 88.3°F, in 1953.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 73.2 | 51.8 |
| 2025 | 80.2 | 52.1 |
| 2024 | 80.8 | 52.8 |
| 2023 | 69.8 | 57.6 |
| 2022 | 59.9 | 34 |
| 2021 | 79.5 | 52.4 |
| 2020 | 58.1 | 42.6 |
| 2019 | 64.5 | 51.3 |
| 2018 | 52.1 | 34.5 |
| 2017 | 74.3 | 44.1 |
| 2016 | 63.5 | 49.7 |
| 2015 | 81.2 | 55.5 |
| 2014 | 80.8 | 53.3 |
| 2013 | 73.9 | 43.7 |
| 2012 | 70.7 | 38.1 |
| 2011 | 62.7 | 47.4 |
| 2010 | 68.1 | 46.3 |
| 2009 | 57.5 | 44.7 |
| 2008 | 68.9 | 54.1 |
| 2007 | 72.7 | 45.2 |
| 2006 | 58.7 | 39.8 |
| 2005 | 62.5 | 37.8 |
| 2004 | 66.7 | 36.7 |
| 2003 | 54.6 | 32.4 |
| 2002 | 70.4 | 47.2 |
| 2001 | 65.7 | 41.1 |
| 2000 | 71.5 | 45.8 |
| 1999 | 59.4 | 41.6 |
| 1998 | 76.6 | 48.7 |
| 1997 | 73.4 | 53 |
| 1996 | 64.7 | 46.7 |
| 1995 | 77.8 | 52.2 |
| 1994 | 64.7 | 40.6 |
| 1993 | 56.8 | 37.2 |
| 1992 | 55.7 | 32.3 |
| 1991 | 63.7 | 34.1 |
| 1990 | 69.1 | 47.6 |
| 1989 | 75.8 | 41.3 |
| 1988 | 62 | 52.7 |
| 1987 | 69.6 | 50.6 |
| 1986 | 74.6 | 58.5 |
| 1985 | 61 | 44.5 |
| 1984 | 53.1 | 27.5 |
| 1983 | 82 | 55.2 |
| 1982 | 75.8 | 54.3 |
| 1981 | 63.4 | 40 |
| 1980 | 68.2 | 46.5 |
| 1979 | 79.2 | 55.4 |
| 1978 | 67.2 | 41.4 |
| 1977 | 69.7 | 45.9 |
| 1976 | 62.8 | 37.7 |
| 1975 | 62.1 | 47.5 |
| 1974 | 61.2 | 42.7 |
| 1973 | 63.7 | 58 |
| 1972 | 62.7 | 37.5 |
| 1971 | 83.7 | 49.2 |
| 1970 | 67.8 | 37.6 |
| 1969 | 67.8 | 45.3 |
| 1968 | 62.2 | 44.2 |
| 1967 | 54.8 | 27.2 |
| 1966 | 65.3 | 46.2 |
| 1965 | 69.9 | 54.1 |
| 1964 | 65.1 | 34.9 |
| 1963 | 67 | 41.7 |
| 1962 | 64.9 | 34.3 |
| 1961 | 55.6 | 32.6 |
| 1960 | 62.2 | 46.7 |
| 1959 | 62.6 | 41.7 |
| 1958 | 71.1 | 43.4 |
| 1957 | 67.9 | 33 |
| 1956 | 73.9 | 45.4 |
| 1955 | 74 | 53.1 |
| 1954 | 75.5 | 57.5 |
| 1953 | 88.3 | 54.7 |
| 1952 | 79.8 | 46 |
| 1951 | 54.4 | 30.4 |
The month
August 2026 averaged 69.8°F in Clayton County, IA, the coldest August in the county average since 2025, tied 58th coldest of 132 (with 1970 and 1942) (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 73.2°F averaged over Clayton County, IA, the warmest 29 September in the county average since 2025, 22nd warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Tuesday 29 September 2026: a low of 51.8°F averaged over Clayton County, IA, the warmest 29 September night in the county average since 2025, 20th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Dubuque, IA 43.7 mi, the nearest city with its own station