Click on a day for an hourly weather forecast
The temperatures in Olathe in September are comfortable with low of 16°C and and high up to 27°C.
You can expect about 3 to 8 days of rain in Olathe during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Olathe in September 2025.
If you’re planning to visit Olathe in the near future, we highly recommend that you review the 14 day weather forecast for Olathe before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -4° | 4 | 20 | 7 | 45 mm | Awful | Olathe in January |
| February | 5° / -3° | 4 | 16 | 9 | 55 mm | Awful | Olathe in February |
| March | 13° / 4° | 6 | 21 | 4 | 130 mm | Bad | Olathe in March |
| April | 18° / 8° | 7 | 22 | 1 | 131 mm | Ok | Olathe in April |
| May | 23° / 14° | 10 | 21 | 0 | 205 mm | Good | Olathe in May |
| June | 29° / 20° | 8 | 22 | 0 | 147 mm | Ok | Olathe in June |
| July | 31° / 21° | 9 | 22 | 0 | 173 mm | Ok | Olathe in July |
| August | 30° / 20° | 8 | 23 | 0 | 159 mm | Ok | Olathe in August |
| September | 27° / 16° | 6 | 24 | 0 | 132 mm | Perfect | Olathe in September |
| October | 19° / 10° | 5 | 25 | 1 | 114 mm | Good | Olathe in October |
| November | 12° / 4° | 3 | 25 | 1 | 70 mm | Ok | Olathe in November |
| December | 6° / -1° | 3 | 23 | 4 | 63 mm | Awful | Olathe in December |