New Iberia weather in September

In September, New Iberia sees average daytime highs of 87°F and overnight lows near 71°F, with 4.2 in of rain across 12.2 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 88°F in the first days to 84°F by the end. The sky is clear or mostly clear about 42% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is New Iberia's 5th-clearest and 9th-windiest month. For the whole year in context, see New Iberia's year-round climate.

Daytime high
87°
4th warmest
Overnight low
71°
9th coldest
Rainfall
4.2 in
12.2 wet days
Daylight
12 h 12 min
5:56 AM – 6:07 PM
Cloud cover
51%
5th clearest
Wind
6 mph
9th windiest
Solar energy
4.92 kWh/m²
Travel score
4.7
out of 10

New Iberia is seat of Iberia Parish, Louisiana, United States.

Density
1,055/km²
people per km²
Founded
1779

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 88°F in the first days to 84°F by the end.

A typical September day in New Iberia reaches about 87°F in the afternoon and slips back to 71°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 81°F and 92°F. Set against its neighbours, September runs about 3°F cooler than August and about 7°F warmer than October.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18974
28974
38874
48874
58874
68874
78873
88873
98873
108873
118873
128773
138772
148772
158772
168772
178772
188771
198671
208671
218671
228670
238670
248569
258569
268569
278568
288568
298468
308467

How September really feels in New Iberia

Once humidity and wind are folded in, September averages 21 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
21
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.

New Iberia weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan62° / 45°4.79.410.35.4
Feb65° / 49°4.18.610.96.1
Mar71° / 54°4.29.111.86.8
Apr77° / 61°4.18.612.77.1
May84° / 68°3.49.713.55.9
Jun88° / 74°4.614.513.93.9
Jul89° / 76°5.01813.73.3
Aug89° / 76°4.817.513.13.3
Sep87° / 71°4.212.212.24.7
Oct80° / 62°3.67.811.37.1
Nov71° / 52°3.47.710.57.1
Dec64° / 47°4.19.110.15.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
25149
35149
45149
55248
65248
75347
85446
95545
105545
115743
125743
135842
145842
155941
165941
176139
186139
196238
206238
216436
226436
236535
246634
256733
266832
276832
286832
296931
306931

Chance of precipitation in September

Any precipitation

New Iberia gets around 4.2 in of rain over 12.2 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 41% and peaks near 52% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
152
252
351
451
550
649
749
848
947
1046
1145
1244
1343
1443
1542
1641
1740
1839
1938
2037
2136
2235
2334
2433
2531
2630
2729
2828
2928
3027

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 47% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1016105429
2016115527
3017115526
4127115425
5127125424
6128125423
7128135422
8128135521
9128145520
10228155419
11238165219
12238165318
13238175317
14338185117
15338195116
16338205016
17438214915
18439214814
19549224614
20649234513
21759234412
228510234211
239610244110
2410611244010
251171224389
261271224378
271381324367
281481324356
291591423346
301691423335

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 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 54 minutes over September. Sunrise moves from 5:48 AM to 6:04 AM, and sunset from 6:26 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:486:26
212.65:486:25
312.65:496:24
412.55:506:22
512.55:506:21
612.55:516:20
712.55:516:19
812.45:526:17
912.45:526:16
1012.45:536:15
1112.35:536:13
1212.35:546:12
1312.35:556:11
1412.25:556:10
1512.25:566:08
1612.25:566:07
1712.15:576:06
1812.15:576:04
1912.15:586:03
2012.15:586:02
2112.05:596:00
2212.06:005:59
2312.06:005:58
2411.96:015:57
2511.96:015:55
2611.96:025:54
2711.86:025:53
2811.86:035:51
2911.86:045:50
3011.76:045:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.92 kWh/m².

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 6.23 kWh/m² in May across the year — September's 4.92 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.7Bright
Planning a trip in September

Hazard calendar for New Iberia

In seasonPeak

In September, New Iberia sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

New Iberia sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit New Iberia?

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

4.7
Sightseeing
9th-best month of the year
6.5
Beach & pool
3rd-best month of the year

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

What to pack for New Iberia in September

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

In September, New Iberia sees daytime highs around 87°F and nights near 71°F. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near New Iberia in September

The nearest coast averages about 83°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 26 mi away) is warmest in August at about 86°F and coldest in January near 58°F.

It's comfortable for a long swim from Mar 29 to Nov 15 — about 7.6 months when the water holds above 68°F.

60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan58Bracing
Feb60Cool
Mar65Cool
Apr72Refreshing
May78Warm
Jun84Tropical
Jul86Tropical
Aug86Tropical
Sep83Tropical
Oct76Warm
Nov68Cool
Dec62Cool

UV index in New Iberia 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 New Iberia peaks around July 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 13UV 11Dec 20UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr10Extreme
May10Extreme
Jun10Extreme
Jul11Extreme
Aug9Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in New Iberia 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 New Iberia is worst in July — around 22 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (February, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1521 µg/m³Feb 128 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb8Good
Mar10Good
Apr10Good
May14Moderate
Jun18Moderate
Jul22Moderate
Aug16Moderate
Sep12Good
Oct11Good
Nov10Good
Dec8Good
Location & terrain

Where is New Iberia?

New Iberia sits at 30.0°N, 91.8°W, 16 ft above sea level, in United States. The nearest listed city is Lafayette, 19 mi away.

Topography around New Iberia

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

Within 2 miles, the terrain around New Iberia has only modest variations in elevation — a maximum elevation change of 75 ft around an average of 23 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 187 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 187 ft.

The land around New Iberia is covered by trees (35%), artificial surfaces (28%) and grassland (24%) within 2 miles, cropland (39%), trees (25%) and grassland (20%) within 10 miles, and trees (35%) and water (22%) within 50 miles.

2 miles
75 ft
10 miles
187 ft
50 miles
187 ft
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Lafayette 19 mi · Opelousas 40 mi · Baton Rouge 48 mi · Prairieville 55 mi · Shenandoah 56 mi · Zachary 60 mi · Central 60 mi · Bayou Cane 69 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 New Iberia (30.0035°, -91.8187°, elevation 16 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).