Weather in Saint Louis in september
Climate normals based on 10 years of historical data for Saint Louis, Seiiellid.
Average high
27°C
Average low
26°C
Rainfall
171 mm
20 rainy days
Sunshine
1.2h/day
Niiskus
81%
How Hot Is Saint Louis in september?
Saint Louis's September sits at about 26°C overall, climbing to 27°C by mid-afternoon and dropping to 26°C before dawn.
Sunshine Hours in september
Saint Louis is gloomy through September: 1.2h of direct sun on a typical day.
Does It Rain In Saint Louis In september?
Persistent wet conditions: Saint Louis sees 171mm in 20 of September's days.
Is Saint Louis Humid In september?
Expect heavy, oppressive air in Saint Louis — humidity peaks at 81% on average.
Wind In Saint Louis In september
Expect a breezy September in Saint Louis — winds average 30 kph.
Cloud Cover In Saint Louis In september
Grey, overcast skies dominate: 77% average cloud cover in Saint Louis.
Cities With Similar Weather In september
Weather in Saint Louis, month by month
| Month | High / Low | Vihm | |
|---|---|---|---|
| Jaanuari ilm | 28°C / 26°C | 290mm | Details → |
| Veebruari ilm | 28°C / 27°C | 185mm | Details → |
| Märtsi ilm | 29°C / 27°C | 135mm | Details → |
| Aprilli ilm | 29°C / 27°C | 200mm | Details → |
| Mai ilm | 29°C / 27°C | 230mm | Details → |
| Juuni ilm | 27°C / 26°C | 123mm | Details → |
| Juuli ilm | 26°C / 25°C | 104mm | Details → |
| Augusti ilm | 26°C / 25°C | 104mm | Details → |
| Septembri ilm | 27°C / 26°C | 171mm | |
| Oktoobri ilm | 28°C / 26°C | 164mm | Details → |
| Novembri ilm | 28°C / 27°C | 235mm | Details → |
| Detsembri ilm | 28°C / 26°C | 350mm | Details → |