Jacksonville weather in September

In September, Jacksonville sees average daytime highs of 84°F and overnight lows near 66°F, with 3.4 in of rain across 6.7 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 88°F in the first days to 80°F by the end. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Jacksonville's 1st-clearest and 10th-windiest month. For the whole year in context, see Jacksonville's year-round climate.

Daytime high
84°
4th warmest
Overnight low
66°
9th coldest
Rainfall
3.4 in
6.7 wet days
Daylight
12 h 12 min
5:56 AM – 6:09 PM
Cloud cover
42%
1st clearest
Wind
6 mph
10th windiest
Solar energy
5.02 kWh/m²
Travel score
6.2
out of 10

Jacksonville is city in Pulaski County, Arkansas, United States.

Density
380/km²
people per km²
Founded
1870

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 80°F by the end.

A typical September day in Jacksonville reaches about 84°F in the afternoon and slips back to 66°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 76°F and 92°F. Set against its neighbours, September runs about 6°F cooler than August and about 10°F warmer than October.

40°60°80°100°151015202530
Avg high (°F)Avg low (°F)
18871
28871
38870
48870
58770
68769
78769
88669
98668
108668
118667
128567
138567
148567
158466
168466
178465
188365
198365
208364
218364
228264
238263
248263
258162
268162
278161
288061
298061
308060

How September really feels in Jacksonville

Once humidity and wind are folded in, September averages 4 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
4
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.

Jacksonville weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan51° / 34°3.68.90.89.92.5
Feb55° / 37°3.99.30.810.73.5
Mar64° / 45°4.911.20.311.75.5
Apr73° / 54°5.310012.96.7
May80° / 63°5.412013.86.2
Jun88° / 71°3.19.4014.34.6
Jul91° / 74°3.49.8014.13.8
Aug90° / 73°2.88.4013.34.1
Sep84° / 66°3.46.7012.26.2
Oct74° / 54°3.97.6011.17.4
Nov62° / 44°4.28.4010.25.6
Dec53° / 37°4.99.20.39.73.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16733
26634
36634
46733
56634
66634
76634
86634
96634
106634
116634
126634
136634
146634
156634
166634
176634
186634
196634
206733
216832
226832
236931
246931
257030
267030
277129
287129
297129
307129

Chance of precipitation in September

Any precipitation

Jacksonville gets around 3.4 in of rain over 6.7 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 23% and peaks near 24% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
124
224
324
424
523
623
723
823
923
1023
1123
1223
1323
1423
1524
1624
1724
1824
1924
2024
2123
2223
2322
2422
2521
2621
2720
2820
2919
3019

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 24% of days. Sticky, muggy-or-worse air turns up on roughly 46% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1471928411
2572027401
3582026391
4692126371
57102125361
68112225341
79122225321
89122225310
910132225290
1011132225280
1112142226260
1213142226250
1314152226230
1415152126220
1516162126210
1617162126190
1718162126180
1820162126170
1921162126160
2023162125150
2125162125140
2227162124130
2329162123120
2430162122110
2532162021100
263416202090
273616201990
283716201980
293917191870
304017191770

Wind in September

Winds average 6 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
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 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 66 minutes over September. Sunrise moves from 5:45 AM to 6:07 AM, and sunset from 6:31 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:456:31
212.75:466:30
312.75:476:28
412.75:476:27
512.65:486:25
612.65:496:24
712.55:506:23
812.55:506:21
912.55:516:20
1012.45:526:18
1112.45:536:17
1212.45:536:15
1312.35:546:14
1412.35:556:12
1512.35:566:11
1612.25:566:09
1712.25:576:08
1812.15:586:06
1912.15:596:05
2012.15:596:03
2112.06:006:02
2212.06:016:00
2312.06:025:59
2411.96:025:57
2511.96:035:56
2611.86:045:54
2711.86:055:53
2811.86:055:51
2911.76:065:50
3011.76:075:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.02 kWh/m².

For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 6.49 kWh/m² in June across the year — September's 5.02 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.4Bright
45.4Bright
55.3Bright
65.3Bright
75.3Bright
85.2Bright
95.2Bright
105.2Bright
115.1Bright
125.1Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in September

Is September a good time to visit Jacksonville?

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

6.2
Sightseeing
3rd-best month of the year
7.5
Beach & pool
1st-best month of the year

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

What to pack for Jacksonville in September

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

In September, Jacksonville sees daytime highs around 84°F and nights near 66°F. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Jacksonville in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jacksonville peaks around June 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 20UV 10Dec 21UV 2
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Jacksonville 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 Jacksonville is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1621 µg/m³Jan 17 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar11Good
Apr11Good
May15Moderate
Jun19Moderate
Jul21Moderate
Aug18Moderate
Sep16Moderate
Oct11Good
Nov8Good
Dec7Good
Location & terrain

Where is Jacksonville?

Jacksonville sits at 34.9°N, 92.1°W, 285 ft above sea level, in United States. The nearest listed city is Sherwood, 7.5 mi away.

Topography around Jacksonville

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

Within 2 miles, the terrain around Jacksonville has only modest variations in elevation — a maximum elevation change of 174 ft around an average of 285 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 413 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,585 ft.

The land around Jacksonville is covered by trees (60%) and artificial surfaces (20%) within 2 miles, trees (59%) and grassland (22%) within 10 miles, and trees (58%) and cropland (20%) within 50 miles.

2 miles
174 ft
10 miles
413 ft
50 miles
1,585 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sherwood 7.5 mi · Cabot 9.3 mi · North Little Rock 11 mi · Little Rock 13 mi · Maumelle 17 mi · Conway 24 mi · Bryant 29 mi · Searcy 34 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 Jacksonville (34.8662°, -92.1102°, elevation 285 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).