Weather on September 15
Olathe, KS
55 Years of Data
Avg High
77°F
Avg Low
59°F
Warmest
1992
79°F avg
Coldest
2011
52°F avg
About This Date
September 15th in Olathe, KS typically brings pleasant fall weather, with average highs around 77°F and lows near 59°F. Over 55 years of records, the warmest September 15th was in 1992 (79°F average), while the coldest was 2011 (52°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 25% of September 15th dates historically, with the wettest September 15th recording 5.08" of rain. The last decade has been 6.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.6°F warmer on this date compared to 20-30 years ago.
Planning for September 15th in Olathe, KS? Great weather for outdoor activities.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 68° | 79° | 0.08" | — |
| 2024 | 89° | 65° | 77° | — | — |
| 2023 | 84° | 57° | 71° | 0.23" | — |
| 2022 | 83° | 61° | 72° | — | — |
| 2021 | 82° | 64° | 73° | — | — |
| 2020 | 78° | 58° | 68° | — | — |
| 2019 | 90° | 69° | 79° | — | — |
| 2018 | 89° | 68° | 79° | — | — |
| 2017 | 85° | 64° | 74° | — | — |
| 2016 | 84° | 65° | 74° | — | — |
| 2015 | 81° | 63° | 72° | — | — |
| 2014 | 71° | 53° | 62° | — | — |
| 2013 | 86° | 63° | 74° | 0.33" | — |
| 2012 | 71° | 55° | 63° | — | — |
| 2011coldest | 57° | 46° | 52° | — | — |
| 2010 | 69° | 63° | 66° | — | — |
| 2009 | 78° | 63° | 70° | — | — |
| 2008 | 62° | 47° | 54° | — | — |
| 2007 | 67° | 44° | 55° | — | — |
| 2006 | 86° | 59° | 73° | — | — |
| 2005 | 85° | 56° | 70° | 2.84" | — |
| 2004 | 87° | 70° | 78° | — | — |
| 2003 | 75° | 56° | 65° | — | — |
| 2002 | 71° | 58° | 64° | 1.57" | — |
| 2001 | 68° | 59° | 64° | — | — |
| 2000 | 79° | 54° | 66° | — | — |
| 1999 | 72° | 56° | 64° | — | — |
| 1998 | 82° | 66° | 74° | — | — |
| 1997 | 86° | 65° | 75° | — | — |
| 1996 | 63° | 58° | 60° | — | — |
| 1995 | 83° | 63° | 73° | — | — |
| 1994 | 88° | 70° | 79° | — | — |
| 1993 | 64° | 41° | 53° | 0.08" | — |
| 1992warmest | 88° | 70° | 79° | — | — |
| 1991 | 84° | 71° | 78° | 1.09" | — |
| 1990 | 86° | 51° | 69° | — | — |
| 1989 | 72° | 46° | 59° | — | — |
| 1988 | 76° | 65° | 70° | 5.08" | — |
| 1987 | 79° | 67° | 73° | 0.36" | — |
| 1986 | 81° | 62° | 71° | 0.41" | — |
| 1985 | 73° | 48° | 61° | — | — |
| 1984 | 64° | 44° | 54° | 1.37" | — |
| 1983 | 72° | 57° | 64° | — | — |
| 1982 | 68° | 57° | 63° | 0.94" | — |
| 1981 | 75° | 60° | 68° | — | — |
| 1980 | 78° | 58° | 68° | — | — |
| 1979 | 70° | 42° | 56° | — | — |
| 1978 | 86° | 65° | 75° | — | — |
| 1977 | 63° | 56° | 59° | — | — |
| 1976 | 85° | 61° | 73° | — | — |
| 1975 | 61° | 53° | 57° | 0.33" | — |
| 1974 | 72° | 55° | 63° | — | — |
| 1973 | 76° | 54° | 65° | — | — |
| 1972 | 82° | 58° | 70° | — | — |
| 1971 | 81° | 56° | 68° | 0.08" | — |
55 years of data from OLATHE 3E