Terrell weather in September

In September, Terrell sees average daytime highs of 88°F and overnight lows near 69°F, with 2.6 in of rain across 6.3 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 91°F in the first days to 85°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 Terrell's 1st-clearest and 11th-windiest month. For the whole year in context, see Terrell's year-round climate.

Daytime high
88°
4th warmest
Overnight low
69°
9th coldest
Rainfall
2.6 in
6.3 wet days
Daylight
12 h 12 min
6:13 AM – 6:25 PM
Cloud cover
41%
1st clearest
Wind
7 mph
11th windiest
Solar energy
5.13 kWh/m²
Travel score
5.1
out of 10

Terrell is city in Kaufman County, Texas, United States.

Density
328/km²
people per km²
Founded
1874

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 Terrell reaches about 88°F in the afternoon and slips back to 69°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 79°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)
19273
29173
39173
49172
59172
69072
79071
89071
98971
108971
118970
128970
138870
148869
158869
168869
178769
188768
198768
208767
218767
228667
238666
248666
258565
268565
278565
288564
298464
308464

How September really feels in Terrell

Once humidity and wind are folded in, September averages 14 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
14
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.

Terrell 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 daysSnow daysDaylight (hours)Travel score
Jan56° / 38°3.07.40.310.14.2
Feb60° / 42°3.48.20.510.85.1
Mar67° / 49°4.3100.111.86.3
Apr75° / 56°4.49.2012.87.0
May82° / 65°5.111.2013.76.0
Jun89° / 72°3.48.8014.14.2
Jul94° / 76°1.86.7013.93.2
Aug94° / 75°2.15.7013.23.2
Sep88° / 69°2.66.3012.25.1
Oct78° / 58°4.27.7011.27.3
Nov66° / 47°3.57.5010.36.6
Dec58° / 40°4.07.70.29.94.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% 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 30%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17030
27030
37030
46931
56931
66931
76832
86733
96733
106733
116733
126733
136733
146634
156634
166634
176733
186832
196832
207030
217030
227228
237327
247426
257525
267525
277525
287624
297624
307525

Chance of precipitation in September

Any precipitation

Terrell gets around 2.6 in of rain over 6.3 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 25% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
123
223
324
424
524
625
725
825
925
1025
1124
1224
1324
1423
1523
1623
1722
1821
1921
2020
2119
2218
2317
2417
2516
2616
2716
2816
2917
3017

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 30% of days. Sticky, muggy-or-worse air turns up on roughly 53% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1481839310
2491838310
3591837300
4691837300
5791836290
6791836290
7891836290
8991736280
9991736280
101091735280
111191735270
1212101735270
1312101734260
1413101734251
1514101733251
1615101832241
1716111832231
1818111831221
1919121830211
2021121829201
2123131827191
2224131826171
2326141825161
2428141923151
2530151922141
2631151921131
2732161920121
2834161919110
2935161918110
3036171918100

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
117calm
127calm
137calm
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 6:04 AM to 6:23 AM, and sunset from 6:46 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:046:46
212.76:046:45
312.66:056:43
412.66:066:42
512.66:066:41
612.56:076:39
712.56:086:38
812.56:086:37
912.46:096:35
1012.46:106:34
1112.46:106:32
1212.36:116:31
1312.36:116:30
1412.36:126:28
1512.26:136:27
1612.26:136:25
1712.26:146:24
1812.16:156:23
1912.16:156:21
2012.16:166:20
2112.06:176:18
2212.06:176:17
2312.06:186:16
2411.96:196:14
2511.96:196:13
2611.96:206:11
2711.86:216:10
2811.86:226:09
2911.76:226:07
3011.76:236:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.13 kWh/m².

For context, solar energy here swings from a low near 2.52 kWh/m² to a high of 6.73 kWh/m² in July across the year — September's 5.13 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.3Bright
105.2Bright
115.2Bright
125.2Bright
135.1Bright
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 Terrell?

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

5.1
Sightseeing
6th-best month of the year
7.4
Beach & pool
1st-best month of the year

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

What to pack for Terrell in September

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

In September, Terrell sees daytime highs around 88°F and nights near 69°F. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in Terrell 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 Terrell peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highHighModerateJun 23UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr10Very high
May10Very high
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Terrell 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 Terrell is worst in July — around 20 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1519 µg/m³Jan 17 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar10Good
Apr10Good
May14Moderate
Jun16Moderate
Jul20Moderate
Aug15Moderate
Sep11Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is Terrell?

Terrell sits at 32.7°N, 96.3°W, 509 ft above sea level, in United States. The nearest listed city is Forney, 11 mi away.

Topography around Terrell

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

Within 2 miles, the terrain around Terrell has only modest variations in elevation — a maximum elevation change of 128 ft around an average of 499 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 236 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 640 ft.

The land around Terrell is covered by grassland (41%) and trees (36%) within 2 miles, grassland (60%) and trees (26%) within 10 miles, and grassland (48%) and trees (30%) within 50 miles.

2 miles
128 ft
10 miles
236 ft
50 miles
640 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Forney 11 mi · Seagoville 17 mi · Rockwall 17 mi · Mesquite 19 mi · Balch Springs 21 mi · Rowlett 21 mi · Garland 24 mi · Wylie 25 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 Terrell (32.736°, -96.2753°, elevation 509 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).