Click on a day for an hourly weather forecast
The weather in Lafayette in September is hot. The average temperatures are between 22°C and 30°C.
You can expect rain for roughly half of the month of September in Lafayette. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Lafayette in September 2025.
If you’re planning to visit Lafayette in the near future, we highly recommend that you review the 14 day weather forecast for Lafayette before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 7° | 4 | 27 | 0 | 82 mm | Good | Lafayette in January |
| February | 18° / 10° | 5 | 24 | 0 | 67 mm | Good | Lafayette in February |
| March | 22° / 13° | 4 | 27 | 0 | 63 mm | Good | Lafayette in March |
| April | 25° / 16° | 4 | 26 | 0 | 64 mm | Perfect | Lafayette in April |
| May | 29° / 20° | 5 | 26 | 0 | 70 mm | Good | Lafayette in May |
| June | 32° / 23° | 9 | 21 | 0 | 122 mm | Ok | Lafayette in June |
| July | 32° / 24° | 12 | 19 | 0 | 149 mm | Ok | Lafayette in July |
| August | 32° / 24° | 13 | 18 | 0 | 170 mm | Ok | Lafayette in August |
| September | 30° / 22° | 8 | 22 | 0 | 121 mm | Ok | Lafayette in September |
| October | 27° / 17° | 4 | 27 | 0 | 70 mm | Perfect | Lafayette in October |
| November | 21° / 12° | 3 | 27 | 0 | 56 mm | Good | Lafayette in November |
| December | 17° / 10° | 5 | 26 | 0 | 74 mm | Good | Lafayette in December |