Lake Charles weather in September: Lake Charles, Louisiana: normal highs, lows, rain and records for September
Lake Charles in September has a normal high of 89°F and a normal low of 71°F, a daily mean of 80°F, falling from 92°F on the 1st to 87°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 5.18 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 32°C and low of 22°C, 132 mm of precipitation in September.
- NOAA stationLake Charles Regional Airport
- Station IDUSW00003937
- Location30.13°N 93.22°W
- Elevation13 ft (4 m)
- From the center5 miles
- Population81,157
- Jan 63° 43°
- Feb 67° 47°
- Mar 73° 53°
- Apr 79° 59°
- May 85° 67°
- Jun 91° 74°
- Jul 92° 76°
- Aug 93° 75°
- Sep 89° 71°
- Oct 82° 60°
- Nov 72° 51°
- Dec 65° 45°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lake Charles in September?
The normal high is 89°F and the normal low 71°F, for a daily mean of 80.1°F. September is 3.9°F cooler than August and 8.8°F warmer than October. September is the 4th warmest month of the year in Lake Charles and the 6th wettest. Across the month the normal high falls 5°F, from 92°F on September 1 to 87°F on September 30. From one year to the next September's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 78°F and 82°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 92°F | 74°F | 36% | 25% |
| September 8 | 91°F | 73°F | 33% | 23% |
| September 15 | 90°F | 71°F | 30% | 21% |
| September 22 | 88°F | 69°F | 28% | 19% |
| September 30 | 87°F | 67°F | 25% | 17% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 92°F | 74°F | 36% | 25% | 12 h 50 min |
| September 2 | 92°F | 74°F | 36% | 24% | 12 h 50 min |
| September 3 | 91°F | 74°F | 35% | 24% | 12 h 40 min |
| September 4 | 91°F | 73°F | 35% | 24% | 12 h 40 min |
| September 5 | 91°F | 73°F | 34% | 24% | 12 h 40 min |
| September 6 | 91°F | 73°F | 34% | 23% | 12 h 40 min |
| September 7 | 91°F | 73°F | 34% | 23% | 12 h 40 min |
| September 8 | 91°F | 73°F | 33% | 23% | 12 h 40 min |
| September 9 | 91°F | 73°F | 33% | 23% | 12 h 30 min |
| September 10 | 90°F | 72°F | 32% | 22% | 12 h 30 min |
| September 11 | 90°F | 72°F | 32% | 22% | 12 h 30 min |
| September 12 | 90°F | 72°F | 32% | 22% | 12 h 30 min |
| September 13 | 90°F | 72°F | 31% | 22% | 12 h 30 min |
| September 14 | 90°F | 71°F | 31% | 21% | 12 h 30 min |
| September 15 | 90°F | 71°F | 30% | 21% | 12 h 20 min |
| September 16 | 89°F | 71°F | 30% | 21% | 12 h 20 min |
| September 17 | 89°F | 71°F | 30% | 21% | 12 h 20 min |
| September 18 | 89°F | 70°F | 29% | 20% | 12 h 20 min |
| September 19 | 89°F | 70°F | 29% | 20% | 12 h 20 min |
| September 20 | 89°F | 70°F | 28% | 20% | 12 h 10 min |
| September 21 | 89°F | 70°F | 28% | 20% | 12 h 10 min |
| September 22 | 88°F | 69°F | 28% | 19% | 12 h 10 min |
| September 23 | 88°F | 69°F | 27% | 19% | 12 h 10 min |
| September 24 | 88°F | 69°F | 27% | 19% | 12 h 10 min |
| September 25 | 88°F | 68°F | 27% | 19% | 12 h 10 min |
| September 26 | 88°F | 68°F | 26% | 18% | 12 h |
| September 27 | 87°F | 68°F | 26% | 18% | 12 h |
| September 28 | 87°F | 67°F | 26% | 18% | 12 h |
| September 29 | 87°F | 67°F | 25% | 18% | 12 h |
| September 30 | 87°F | 67°F | 25% | 17% | 12 h |
- Normal high
- 89°FSeptember average
- Normal low
- 71°FSeptember average
- Precipitation
- 5.18 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 16
- Daylight
- 12 h 50 min to 12 hSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 28
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003937; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lake Charles in September?
On a given September day the chance of 0.01 inch or more is 30% on average, highest around September 1 (36%). In all, 5.18 in falls on 9 days of a normal September, 2 of them with an inch or more.
In a normal September in Lake Charles, 16 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003937.
How humid and windy is Lake Charles in September?
At 3 p.m. the normal temperature is 84°F with 51% relative humidity and a dew point of 64°F; at 6 a.m. it is 67°F with 90% humidity. The wind averages 6.7 mph, most often from the east-northeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 67°F | 64°F | 90% | 5.3 mph | 74% |
| 9 a.m. | 76°F | 66°F | 72% | 8.7 mph | 67% |
| noon | 83°F | 65°F | 54% | 9.5 mph | 60% |
| 3 p.m. | 84°F | 64°F | 51% | 9.3 mph | 64% |
| 6 p.m. | 78°F | 66°F | 66% | 6.3 mph | 80% |
| 9 p.m. | 72°F | 66°F | 83% | 5.0 mph | 81% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00003937. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Lake Charles?
The warmest September temperature on Lake Charles's official record (since 1895) is 105°F, on September 4, 2000; the coldest is 45°F, on September 30, 1909. The wettest September brought 19.96 in (1973).
The September mean against the 1991-2020 normal of 80.1°F: 2021 78.4°F (−1.7), 2022 78.5°F (−1.5), 2023 83.0°F (+2.9), 2024 80.9°F (+0.8), 2025 80.3°F (+0.2), 2026 83.3°F (+3.2). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 78.4°F | −1.7°F | 8.56 in |
| 2022 | 78.5°F | −1.5°F | 1.66 in |
| 2023 | 83.0°F | +2.9°F | 2.82 in |
| 2024 | 80.9°F | +0.8°F | 1.09 in |
| 2025 | 80.3°F | +0.2°F | 2.30 in |
| 2026 | 83.3°F | +3.2°F | 3.33 in |
Source: records: ACIS, NWS threaded record LCHthr; recent months: ACIS, station USW00003937. Records and recent months use complete months only.
How does September in Lake Charles compare across Louisiana?
Across the 65 places PlainClimate covers in Louisiana, September normal highs run from 85°F in Boyce to 90°F in Natchitoches; Lake Charles's is 89°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Lake Charles in August93°F by day, 75°F at night
- Lake Charles in October82°F by day, 60°F at night
- Lake Charles through the yearEvery month, frost dates, records and recent years
- Louisiana in SeptemberThe statewide normal and the warmest and coolest places
- Natchitoches: Louisiana's warmest Septembernormal high 90°F