Alexandria weather in September

In September, Alexandria sees average daytime highs of 89°F and overnight lows near 69°F, with 3.7 in of rain across 9.2 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 91°F in the first days to 85°F by the end. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Alexandria's 2nd-clearest and 9th-windiest month. For the whole year in context, see Alexandria's year-round climate.

Daytime high
89°
4th warmest
Overnight low
69°
9th coldest
Rainfall
3.7 in
9.2 wet days
Daylight
12 h 12 min
5:58 AM – 6:10 PM
Cloud cover
47%
2nd clearest
Wind
5 mph
9th windiest
Solar energy
5.03 kWh/m²
Travel score
4.5
out of 10

Alexandria is largest city and parish seat of Rapides Parish, Louisiana, United States.

Density
635/km²
people per km²
Founded
1818

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 91°F in the first days to 85°F by the end.

A typical September day in Alexandria reaches about 89°F in the afternoon and slips back to 69°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 95°F. Set against its neighbours, September runs about 4°F cooler than August and about 9°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19172
29172
39172
49172
59171
69171
79071
89071
99071
109070
119070
128970
138970
148970
158969
168969
178869
188869
198868
208868
218767
228767
238767
248766
258666
268666
278665
288565
298564
308564

How September really feels in Alexandria

Once humidity and wind are folded in, September averages 19 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
19
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Alexandria weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 41°4.79.810.24.7
Feb63° / 44°4.09.510.95.6
Mar71° / 51°4.410.411.86.5
Apr77° / 57°4.8912.77.0
May85° / 65°4.010.313.65.4
Jun90° / 72°4.112.6143.7
Jul92° / 74°3.813.113.83.1
Aug93° / 74°3.512.513.12.9
Sep89° / 69°3.79.212.24.5
Oct79° / 58°3.87.311.27.2
Nov69° / 48°3.8810.46.8
Dec61° / 43°4.59.2105.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15941
25941
35941
46139
56139
66139
76238
86238
96436
106436
116436
126436
136436
146535
156535
166535
176436
186436
196436
206535
216535
226634
236733
246832
256931
266931
276931
286931
296931
306931

Chance of precipitation in September

Any precipitation

Alexandria gets around 3.7 in of rain over 9.2 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 31% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
238
338
438
537
637
736
835
934
1033
1133
1232
1332
1432
1532
1631
1731
1830
1929
2029
2128
2227
2326
2425
2525
2624
2723
2822
2921
3021

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 66% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1261025516
2271025506
3281025495
4381025485
5391125485
63101125474
73101126464
84101126454
94111126443
105111126443
115111127433
125121127423
136121227422
146121227412
156121227402
167121328382
178121328372
189121427353
1910121428343
2011121428323
2112121428303
2214121528293
2315121528273
2417121627253
2518131627242
2619131727222
2720131726212
2821141826202
2923141825182
3024141824172

Wind in September

Winds average 5 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 5:49 AM to 6:07 AM, and sunset from 6:30 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:496:30
212.65:506:28
312.65:516:27
412.65:516:26
512.55:526:24
612.55:526:23
712.55:536:22
812.45:546:20
912.45:546:19
1012.45:556:18
1112.45:556:16
1212.35:566:15
1312.35:576:14
1412.35:576:12
1512.25:586:11
1612.25:586:10
1712.25:596:08
1812.16:006:07
1912.16:006:06
2012.16:016:04
2112.06:026:03
2212.06:026:02
2312.06:036:00
2411.96:035:59
2511.96:045:58
2611.96:055:56
2711.86:055:55
2811.86:065:54
2911.86:075:52
3011.76:075:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.03 kWh/m².

For context, solar energy here swings from a low near 2.51 kWh/m² to a high of 6.15 kWh/m² in July across the year — September's 5.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Alexandria?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.5
Sightseeing
9th-best month of the year
6.8
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Alexandria for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Alexandria in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Alexandria sees daytime highs around 89°F and nights near 69°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Alexandria in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Alexandria peaks around July 11 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highHighModerateJul 11UV 10Dec 21UV 3
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr10Very high
May10Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Alexandria in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Alexandria is worst in July — around 24 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (January, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1624 µg/m³Jan 129 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar13Moderate
Apr12Good
May16Moderate
Jun19Moderate
Jul24Moderate
Aug19Moderate
Sep14Moderate
Oct11Good
Nov9Good
Dec9Good
Location & terrain

Where is Alexandria?

Alexandria sits at 31.3°N, 92.4°W, 75 ft above sea level, in United States. The nearest listed city is Natchitoches, 49 mi away.

Topography around Alexandria

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Alexandria.

Within 2 miles, the terrain around Alexandria has only modest variations in elevation — a maximum elevation change of 138 ft around an average of 92 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 249 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 476 ft.

The land around Alexandria is covered by trees (42%), grassland (28%) and artificial surfaces (23%) within 2 miles, trees (60%) and grassland (22%) within 10 miles, and trees (74%) within 50 miles.

2 miles
138 ft
10 miles
249 ft
50 miles
476 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Natchitoches 49 mi · Opelousas 58 mi · Natchez 64 mi · Lafayette 80 mi · Ruston 85 mi · Monroe 85 mi · Lake Charles 88 mi · Zachary 89 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Alexandria (31.3113°, -92.4451°, elevation 75 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).