Climate averages 1991–2020
Metairie weather
in September.
A hot, wet month: the 4th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Metairie: daytime highs average 29.1°C and nights cool to about 23.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 118 mm of rain on roughly 12 days, which makes September a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 22 min on an average September day.
The nearest other city in this atlas is New Orleans (8 km away). In September its highs average 28.9°C, about as warm as Metairie, with 123 mm of rain.
Among the 498 cities listed in the United States, Metairie ranks joint 169th of 498 for the warmest September highs and joint 442nd of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Metairie is 2.2°C warmer than that mean.
From September to October, average highs fall by 3.8°C to 25.3°C, and monthly rainfall falls from 118 mm to 89 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Metairie climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 16.0°C9.1°C | 9.1°C | 119 | 9.8 | 10.410 h |
| February | 17.9°C10.7°C | 10.7°C | 112 | 9.4 | 11.111 h |
| March | 20.8°C13.6°C | 13.6°C | 115 | 9.6 | 12.012 h |
| April | 24.2°C17.2°C | 17.2°C | 100 | 8.8 | 12.913 h |
| May | 28.0°C21.2°C | 21.2°C | 93 | 9.1 | 13.614 h |
| June | 30.4°C24.3°C | 24.3°C | 124 | 14.6 | 14.014 h |
| July | 31.0°C25.3°C | 25.3°C | 136 | 18.0 | 13.914 h |
| August | 30.9°C25.3°C | 25.3°C | 148 | 17.1 | 13.213 h |
| September, selected | 29.1°C23.5°C | 23.5°C | 118 | 12.4 | 12.412 h |
| October | 25.3°C18.9°C | 18.9°C | 89 | 8.1 | 11.511 h |
| November | 20.5°C13.6°C | 13.6°C | 87 | 7.6 | 10.711 h |
| December | 17.2°C10.4°C | 10.4°C | 98 | 9.6 | 10.310 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- New Orleans in SeptemberUnited States · 8 kmHigh 28.9°C · Low 23.5°C · 123 mm rain
- Gulfport in SeptemberUnited States · 110 kmHigh 28.8°C · Low 22.9°C · 144 mm rain
- Baton Rouge in SeptemberUnited States · 112 kmHigh 30.1°C · Low 21.8°C · 100 mm rain
- Lafayette (Louisiana), United States in SeptemberUnited States · 182 kmHigh 30.3°C · Low 22.0°C · 96 mm rain
- Mobile in SeptemberUnited States · 217 kmHigh 29.4°C · Low 22.2°C · 117 mm rain
- Jackson in SeptemberUnited States · 257 kmHigh 30.4°C · Low 19.9°C · 83 mm rain
- Lake Charles in SeptemberUnited States · 295 kmHigh 30.3°C · Low 21.9°C · 121 mm rain
- Beaumont in SeptemberUnited States · 380 kmHigh 30.2°C · Low 22.0°C · 136 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Metairie) is explained once on the Metairie year overview and on the Sources, method and limits page.