Nacogdoches weather in September

In September, Nacogdoches sees average daytime highs of 89°F and overnight lows near 69°F, with 3.5 in of rain across 7.9 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 92°F in the first days to 85°F by the end. The sky is clear or mostly clear about 48% 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 Nacogdoches's 2nd-clearest and 10th-windiest month. For the whole year in context, see Nacogdoches's year-round climate.

Daytime high
89°
4th warmest
Overnight low
69°
9th coldest
Rainfall
3.5 in
7.9 wet days
Daylight
12 h 12 min
6:07 AM – 6:19 PM
Cloud cover
45%
2nd clearest
Wind
5 mph
10th windiest
Solar energy
5.05 kWh/m²
Travel score
4.6
out of 10

Nacogdoches is city in and county seat of Nacogdoches County, Texas, United States.

Density
483/km²
people per km²
Founded
1837

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 92°F in the first days to 85°F by the end.

A typical September day in Nacogdoches 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 81°F and 96°F. Set against its neighbours, September runs about 6°F cooler than August and about 10°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19272
29272
39272
49172
59172
69171
79171
89171
99071
109071
119070
129070
138970
148970
158969
168969
178869
188869
198868
208868
218767
228767
238767
248666
258666
268665
278565
288565
298564
308564

How September really feels in Nacogdoches

Once humidity and wind are folded in, September averages 18 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
18
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.

Nacogdoches weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan59° / 41°4.09.410.24.6
Feb63° / 44°3.99.110.85.5
Mar70° / 51°4.39.811.86.6
Apr77° / 57°4.78.912.87.0
May85° / 66°4.310.913.65.4
Jun90° / 72°3.811.4143.7
Jul94° / 75°2.69.713.92.9
Aug94° / 74°2.89.213.22.9
Sep89° / 69°3.57.912.24.6
Oct79° / 58°4.57.611.27.2
Nov68° / 49°3.88.210.46.7
Dec60° / 42°4.49.4105.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% 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 (%)
16040
26139
36139
46238
56238
66337
76337
86337
96337
106436
116436
126436
136337
146337
156337
166337
176337
186436
196436
206634
216634
226733
236832
246931
257030
267030
277129
287129
297129
307129

Chance of precipitation in September

Any precipitation

Nacogdoches gets around 3.5 in of rain over 7.9 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 27% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
131
231
331
430
530
630
729
829
929
1028
1128
1229
1329
1429
1529
1629
1728
1828
1927
2027
2126
2225
2324
2423
2523
2622
2721
2821
2920
3020

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 62% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1261429463
2261529453
3371528453
4371628443
5471627433
6481627423
7581626423
8681626413
9681726413
10781626403
11781626393
12881626393
13991626383
14991626373
151091626363
161191626353
171291626343
181391726323
191491726313
2015101726303
2117101726283
2218111725263
2320111625252
2421111625242
2523121725222
2624121724212
2725131724201
2826131724191
2927131724181
3028131723171

Wind in September

Winds average 5 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 5 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
285calm
295calm
305calm

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 5:58 AM to 6:16 AM, and sunset from 6:39 PM to 6:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:586:39
212.65:596:37
312.65:596:36
412.66:006:35
512.56:006:33
612.56:016:32
712.56:026:31
812.56:026:29
912.46:036:28
1012.46:046:27
1112.46:046:25
1212.36:056:24
1312.36:056:23
1412.36:066:21
1512.26:076:20
1612.26:076:19
1712.26:086:17
1812.16:086:16
1912.16:096:15
2012.16:106:13
2112.06:106:12
2212.06:116:10
2312.06:126:09
2411.96:126:08
2511.96:136:06
2611.96:146:05
2711.86:146:04
2811.86:156:02
2911.86:156:01
3011.76:166:00

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.05 kWh/m².

For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 6.39 kWh/m² in July across the year — September's 5.05 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.1Bright
115.1Bright
125.1Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Nacogdoches?

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

4.6
Sightseeing
8th-best month of the year
7.0
Beach & pool
1st-best month of the year

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

What to pack for Nacogdoches in September

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

In September, Nacogdoches sees daytime highs around 89°F and nights near 69°F. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Nacogdoches 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 Nacogdoches peaks around August 10 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateAug 10UV 10Dec 20UV 3
UV index (midday)Level
Jan4Moderate
Feb5High
Mar7High
Apr10Very high
May10Very high
Jun10Very high
Jul10Very high
Aug10Extreme
Sep8Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Nacogdoches 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 Nacogdoches is worst in July — around 23 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (January, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1622 µg/m³Jan 148 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar12Good
Apr11Good
May15Moderate
Jun18Moderate
Jul23Moderate
Aug18Moderate
Sep15Moderate
Oct10Good
Nov9Good
Dec8Good
Location & terrain

Where is Nacogdoches?

Nacogdoches sits at 31.6°N, 94.7°W, 302 ft above sea level, in United States. The nearest listed city is Lufkin, 19 mi away.

Topography around Nacogdoches

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

Within 2 miles, the terrain around Nacogdoches has only modest variations in elevation — a maximum elevation change of 240 ft around an average of 361 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 453 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 686 ft.

The land around Nacogdoches is covered by trees (64%) within 2 miles, trees (68%) and grassland (29%) within 10 miles, and trees (75%) and grassland (22%) within 50 miles.

2 miles
240 ft
10 miles
453 ft
50 miles
686 ft
treesgrasslandartificial surfacesbare terrainwater
September weather nearby: Lufkin 19 mi · Palestine 58 mi · Longview 62 mi · Tyler 64 mi · Marshall 67 mi · Huntsville 81 mi · Shreveport 83 mi · Bossier City 83 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 Nacogdoches (31.6035°, -94.6555°, elevation 302 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).