Angleton weather in September

In September, Angleton sees average daytime highs of 87°F and overnight lows near 72°F, with 4.7 in of rain across 12.7 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 89°F in the first days to 85°F by the end. The sky is clear or mostly clear about 46% 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 48 min by month's end. Set against the rest of the year, September is Angleton's 2nd-clearest and 11th-windiest month. For the whole year in context, see Angleton's year-round climate.

Daytime high
87°
4th warmest
Overnight low
72°
9th coldest
Rainfall
4.7 in
12.7 wet days
Daylight
12 h 12 min
6:11 AM – 6:21 PM
Cloud cover
50%
2nd clearest
Wind
6 mph
11th windiest
Solar energy
4.97 kWh/m²
Travel score
4.5
out of 10

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

Density
649/km²
people per km²
Founded
1912

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 89°F in the first days to 85°F by the end.

A typical September day in Angleton reaches about 87°F in the afternoon and slips back to 72°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 82°F and 92°F. Set against its neighbours, September runs about 4°F cooler than August and about 7°F warmer than October.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18975
28975
38975
48975
58974
68974
78974
88974
98874
108874
118874
128874
138873
148773
158773
168773
178773
188772
198772
208772
218671
228671
238671
248670
258670
268570
278569
288569
298569
308569

How September really feels in Angleton

Once humidity and wind are folded in, September averages 23 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
23
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.

Angleton weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan64° / 47°3.79.710.35.8
Feb67° / 51°2.98.2116.3
Mar72° / 56°3.38.811.86.9
Apr78° / 62°3.58.412.77.1
May84° / 70°3.29.913.45.7
Jun89° / 75°4.012.613.84.0
Jul91° / 77°3.512.813.73.5
Aug91° / 76°3.613.1133.4
Sep87° / 72°4.712.712.24.5
Oct81° / 64°4.18.911.36.8
Nov72° / 55°3.98.610.57.0
Dec65° / 49°3.88.810.26.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25644
35644
45644
55644
65644
75644
85644
95644
105644
115644
125644
135644
145644
155743
165842
175842
186040
196139
206337
216337
226535
236733
246832
256931
267030
277129
287228
297228
307228

Chance of precipitation in September

Any precipitation

Angleton gets around 4.7 in of rain over 12.7 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 42% and peaks near 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
150
250
350
450
550
650
750
849
949
1048
1148
1247
1346
1445
1545
1643
1742
1841
1940
2039
2138
2236
2335
2434
2533
2633
2732
2831
2931
3030

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 46% of days. Sticky, muggy-or-worse air turns up on roughly 85% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1013105234
2114105232
3114105331
4114105430
5114115429
6114115528
7124115527
8124115527
9125115427
10125125426
11135125326
12135125326
13136135126
14136135225
15146145025
16147144925
17247154724
18258164624
19358174423
20469174222
21469184122
225710193921
236710193720
247811203619
258811203518
269812213416
279912213315
2810912223314
2911913223213
3012913223212

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
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 36 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over September. Sunrise moves from 6:03 AM to 6:18 AM, and sunset from 6:40 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:036:40
212.66:046:39
312.66:046:37
412.56:056:36
512.56:056:35
612.56:066:34
712.46:066:33
812.46:076:31
912.46:076:30
1012.46:086:29
1112.36:086:28
1212.36:096:26
1312.36:096:25
1412.26:106:24
1512.26:106:22
1612.26:116:21
1712.16:116:20
1812.16:126:19
1912.16:126:17
2012.16:136:16
2112.06:146:15
2212.06:146:14
2312.06:156:12
2411.96:156:11
2511.96:166:10
2611.96:166:09
2711.86:176:07
2811.86:176:06
2911.86:186:05
3011.86:186:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.97 kWh/m².

For context, solar energy here swings from a low near 2.66 kWh/m² to a high of 6.2 kWh/m² in July across the year — September's 4.97 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.1Bright
75.1Bright
85.1Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
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

Hazard calendar for Angleton

In seasonPeak

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

Angleton 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 Angleton?

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

4.5
Sightseeing
9th-best month of the year
6.4
Beach & pool
4th-best month of the year

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

What to pack for Angleton in September

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

In September, Angleton sees daytime highs around 87°F and nights near 72°F. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Angleton in September

The nearest coast averages about 84°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 19 mi away) is warmest in August at about 86°F and coldest in January near 59°F.

It's comfortable for a long swim from Apr 3 to Nov 25 — about 7.8 months when the water holds above 68°F.

60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan59Cool
Feb60Cool
Mar64Cool
Apr71Refreshing
May78Warm
Jun83Tropical
Jul85Tropical
Aug86Tropical
Sep84Tropical
Oct78Warm
Nov70Refreshing
Dec63Cool

UV index in Angleton in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Angleton peaks around August 10 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highHighModerateAug 10UV 11Dec 21UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar6High
Apr10Extreme
May10Extreme
Jun10Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct6High
Nov5High
Dec4Moderate

Air quality in Angleton 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 Angleton is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (November, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1521 µg/m³Nov 218 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar10Good
Apr10Good
May13Moderate
Jun17Moderate
Jul21Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Angleton?

Angleton sits at 29.2°N, 95.4°W, 30 ft above sea level, in United States. The nearest listed city is Lake Jackson, 9.3 mi away.

Topography around Angleton

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

Within 2 miles, the terrain around Angleton has only modest variations in elevation — a maximum elevation change of 59 ft around an average of 30 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 135 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 236 ft.

The land around Angleton is covered by grassland (40%) and trees (39%) within 2 miles, grassland (40%) and trees (37%) within 10 miles, and water (33%), trees (23%) and grassland (22%) within 50 miles.

2 miles
59 ft
10 miles
135 ft
50 miles
236 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Lake Jackson 9.3 mi · Alvin 21 mi · Fresno 25 mi · Friendswood 29 mi · Pearland 29 mi · Dickinson 30 mi · League City 31 mi · La Marque 31 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 Angleton (29.1694°, -95.4319°, elevation 30 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).