Union County, IA
: September 2026 so far averaged 70.6°F in Union County, IA, the warmest 1 to 29 September in the county average since the data begin in 1951 (county average from NOAA gridded data, 1951 to 2026).
Last updated . This page normally updates every day; the latest update is late.
- High
- 76.6°F
- Warmest since 2025
- 22nd warmest of 76
- Low
- 57.5°F
- Warmest since 1998
- 8th warmest of 76
No measurable precipitation in the county average of Union County, IA for 2 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).
- Normal range, 34.1 to 55.1°F
Every year as a table
Every 29 September high of the county average in Union County, IA since 1951: 76.6°F in 2026; the highest is 92.1°F, in 1953.
| Year | High, °F | Low, °F |
|---|---|---|
| 2026 | 76.6 | 57.5 |
| 2025 | 87 | 53.5 |
| 2024 | 84.3 | 52.5 |
| 2023 | 80 | 51.7 |
| 2022 | 66.1 | 35.8 |
| 2021 | 89.5 | 56.4 |
| 2020 | 60.4 | 41.5 |
| 2019 | 68.8 | 51 |
| 2018 | 48.4 | 42.4 |
| 2017 | 75.4 | 46.7 |
| 2016 | 61.5 | 46.5 |
| 2015 | 83.5 | 55.6 |
| 2014 | 80.3 | 55.8 |
| 2013 | 70.7 | 43.5 |
| 2012 | 73.7 | 41.2 |
| 2011 | 80.6 | 50.9 |
| 2010 | 72.7 | 48 |
| 2009 | 63.4 | 40.4 |
| 2008 | 75.9 | 55 |
| 2007 | 75.4 | 42.7 |
| 2006 | 59.2 | 40.5 |
| 2005 | 60.5 | 33.8 |
| 2004 | 70 | 38.8 |
| 2003 | 59.7 | 32.2 |
| 2002 | 81.1 | 50.3 |
| 2001 | 72.8 | 41.8 |
| 2000 | 78 | 48.1 |
| 1999 | 63.1 | 39.5 |
| 1998 | 81.5 | 59.7 |
| 1997 | 76.1 | 49.9 |
| 1996 | 68.7 | 45 |
| 1995 | 79.5 | 51.3 |
| 1994 | 74 | 43.3 |
| 1993 | 65.5 | 34.1 |
| 1992 | 58.6 | 32.6 |
| 1991 | 71.3 | 39.4 |
| 1990 | 76.2 | 49.8 |
| 1989 | 75.2 | 42 |
| 1988 | 67.9 | 59.9 |
| 1987 | 73.9 | 50.9 |
| 1986 | 82.5 | 60.5 |
| 1985 | 58 | 38.5 |
| 1984 | 54.2 | 27.7 |
| 1983 | 84 | 60.5 |
| 1982 | 79.4 | 58.8 |
| 1981 | 72.8 | 42.3 |
| 1980 | 74.8 | 47.4 |
| 1979 | 82 | 48.4 |
| 1978 | 69.8 | 44.4 |
| 1977 | 72 | 47.1 |
| 1976 | 59.6 | 43.7 |
| 1975 | 68 | 46.3 |
| 1974 | 60.8 | 32.5 |
| 1973 | 68.8 | 52.5 |
| 1972 | 71.5 | 37.1 |
| 1971 | 87.2 | 59.3 |
| 1970 | 76.9 | 41.4 |
| 1969 | 74.9 | 51.6 |
| 1968 | 72.5 | 51 |
| 1967 | 60.4 | 30.5 |
| 1966 | 64.9 | 45.2 |
| 1965 | 77.8 | 54.1 |
| 1964 | 71.7 | 37.7 |
| 1963 | 70.7 | 41.3 |
| 1962 | 68.9 | 39.4 |
| 1961 | 65 | 40.3 |
| 1960 | 67 | 48.5 |
| 1959 | 58.1 | 36.2 |
| 1958 | 72.2 | 44.9 |
| 1957 | 71.6 | 37.2 |
| 1956 | 82.4 | 46 |
| 1955 | 75.8 | 56.8 |
| 1954 | 75.9 | 57.5 |
| 1953 | 92.1 | 63.5 |
| 1952 | 85.4 | 53 |
| 1951 | 60.8 | 36 |
The month
August 2026 averaged 72.9°F in Union County, IA, the warmest August in the county average since 2023, tied 53rd warmest of 132 (with 2016 and 1929) (county average from NOAA's monthly county data, 1895 to 2026).
The month in words
- Tuesday 29 September 2026: a high of 76.6°F averaged over Union 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 57.5°F averaged over Union County, IA, the warmest 29 September night in the county average since 1998, tied 8th warmest of 76 (with 1954) (county average from NOAA gridded data, 1951 to 2026).
- Days of the month without a value
- 0
Nearby
Des Moines, IA 46.5 mi, the nearest city with its own station