Denton weather in September

In September, Denton sees average daytime highs of 87°F and overnight lows near 68°F, with 3.0 in of rain across 6.2 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 90°F in the first days to 83°F by the end. The sky is clear or mostly clear about 55% of the time in September, and the air most often feels muggy.

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 Denton's 2nd-clearest and 11th-windiest month. For the whole year in context, see Denton's year-round climate.

Daytime high
87°
4th warmest
Overnight low
68°
9th coldest
Rainfall
3.0 in
6.2 wet days
Daylight
12 h 12 min
6:17 AM – 6:29 PM
Cloud cover
40%
2nd clearest
Wind
7 mph
11th windiest
Solar energy
5.14 kWh/m²
Travel score
5.4
out of 10

Denton is city in Denton County, Texas, United States.

Density
566/km²
people per km²
Founded
1866

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 90°F in the first days to 83°F by the end.

A typical September day in Denton reaches about 87°F in the afternoon and slips back to 68°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 95°F. Set against its neighbours, September runs about 7°F cooler than August and about 10°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19172
29172
39172
49071
59071
68971
78971
88970
98970
108870
118869
128769
138769
148768
158768
168668
178667
188667
198667
208566
218566
228565
238565
248465
258464
268464
278363
288363
298363
308362

How September really feels in Denton

Once humidity and wind are folded in, September averages 9 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
9
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.

Denton weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan55° / 36°2.46.50.610.14.0
Feb59° / 40°2.670.710.85.0
Mar67° / 47°3.78.50.311.76.5
Apr74° / 55°3.88012.87.3
May82° / 64°5.211.2013.76.0
Jun89° / 72°3.38.3014.24.3
Jul94° / 75°1.85.40143.2
Aug94° / 75°1.95.3013.23.3
Sep87° / 68°3.06.2012.25.4
Oct77° / 56°3.77.5011.27.5
Nov65° / 46°3.16.40.110.36.6
Dec56° / 38°3.06.30.49.84.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 29%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27327
37228
47228
57030
67030
77030
86931
96931
106931
116832
126832
136832
146733
156733
166733
176832
186832
197030
207030
217129
227228
237426
247426
257525
267525
277624
287624
297624
307525

Chance of precipitation in September

Any precipitation

Denton gets around 3.0 in of rain over 6.2 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 21% and peaks near 24% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
121
221
322
422
523
623
723
823
924
1024
1124
1224
1324
1424
1524
1623
1723
1822
1922
2021
2120
2219
2318
2417
2517
2616
2716
2816
2916
3016

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 47% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1510243922
2510243822
3611243722
4711243622
5811243521
6911243421
7911243421
81011233421
91111233421
101211223420
111211223520
121311213520
131311213519
141412213519
151512203518
161612203517
171713203416
181813193416
191914193315
202114193214
212215193113
222415192912
232616192811
242816192610
25301720259
26321720238
27341721218
28351721207
29371621197
30391621186

Wind in September

Winds average 7 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
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:07 AM to 6:27 AM, and sunset from 6:50 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:076:50
212.76:076:49
312.76:086:47
412.66:096:46
512.66:096:44
612.66:106:43
712.56:116:42
812.56:116:40
912.46:126:39
1012.46:136:37
1112.46:136:36
1212.36:146:35
1312.36:156:33
1412.36:156:32
1512.26:166:30
1612.26:176:29
1712.26:176:27
1812.16:186:26
1912.16:196:25
2012.16:206:23
2112.06:206:22
2212.06:216:20
2312.06:226:19
2411.96:226:18
2511.96:236:16
2611.96:246:15
2711.86:246:13
2811.86:256:12
2911.76:266:11
3011.76:276:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.14 kWh/m².

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 6.82 kWh/m² in July across the year — September's 5.14 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.4Bright
75.4Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.1Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Denton?

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

5.4
Sightseeing
6th-best month of the year
7.5
Beach & pool
1st-best month of the year

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

What to pack for Denton in September

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

In September, Denton sees daytime highs around 87°F and nights near 68°F. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in Denton in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Denton peaks around July 14 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 — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 14UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr9Very high
May9Very high
Jun10Extreme
Jul10Extreme
Aug10Very high
Sep7Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Denton 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 Denton is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1617 µg/m³Dec 136 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr10Good
May13Moderate
Jun15Moderate
Jul18Moderate
Aug14Moderate
Sep10Good
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is Denton?

Denton sits at 33.2°N, 97.1°W, 659 ft above sea level, in United States. The nearest listed city is Corinth, 5.6 mi away.

Topography around Denton

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

Within 2 miles, the terrain around Denton has only modest variations in elevation — a maximum elevation change of 164 ft around an average of 663 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 331 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,020 ft.

The land around Denton is covered by artificial surfaces (45%) and trees (38%) within 2 miles, grassland (49%) and trees (26%) within 10 miles, and grassland (47%) and trees (29%) within 50 miles.

2 miles
164 ft
10 miles
331 ft
50 miles
1,020 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Corinth 5.6 mi · Highland Village 9.9 mi · Little Elm 12 mi · Flower Mound 14 mi · Lewisville 14 mi · The Trails of Frisco 16 mi · The Colony 17 mi · Frisco 19 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 Denton (33.2148°, -97.1331°, elevation 659 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).