San Angelo weather in September

In September, San Angelo sees average daytime highs of 87°F and overnight lows near 66°F, with 2.1 in of rain across 6 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 90°F in the first days to 85°F by the end. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels humid.

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 San Angelo's 5th-clearest and 11th-windiest month. For the whole year in context, see San Angelo's year-round climate.

Daytime high
87°
4th warmest
Overnight low
66°
9th coldest
Rainfall
2.1 in
6 wet days
Daylight
12 h 12 min
6:30 AM – 6:42 PM
Cloud cover
39%
5th clearest
Wind
8 mph
11th windiest
Solar energy
5.38 kWh/m²
Travel score
5.3
out of 10

San Angelo is city in and county seat of Tom Green County, Texas, United States.

Density
620/km²
people per km²

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 85°F by the end.

A typical September day in San Angelo reaches about 87°F in the afternoon and slips back to 66°F overnight — a 21°F spread between the day's warmth and the night's chill. On most days the high lands between 79°F and 95°F. Set against its neighbours, September runs about 6°F cooler than August and about 9°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19170
29170
39070
49070
59069
69069
78969
88969
98968
108968
118868
128868
138867
148767
158767
168766
178766
188766
198665
208665
218665
228664
238664
248564
258563
268563
278563
288562
298462
308462

How September really feels in San Angelo

Once humidity and wind are folded in, September averages 6 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
6
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.

San Angelo weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan59° / 36°1.14.10.610.25.4
Feb64° / 40°1.350.410.96.5
Mar71° / 47°1.95.8011.87.5
Apr79° / 55°2.15.9012.77.6
May86° / 63°3.410013.65.2
Jun92° / 71°2.37.60143.7
Jul95° / 73°1.35.4013.83.0
Aug94° / 73°1.66013.13.2
Sep87° / 66°2.16012.25.3
Oct78° / 56°2.36011.27.7
Nov67° / 45°1.44.30.210.47.3
Dec60° / 37°1.44.80.5105.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% 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 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17624
27624
37525
47525
57525
67426
77426
87327
97228
107228
117129
127129
137030
147030
156931
166931
177030
187030
197129
207129
217327
227327
237426
247525
257525
267723
277723
287822
297822
307822

Chance of precipitation in September

Any precipitation

San Angelo gets around 2.1 in of rain over 6 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 20% and peaks near 24% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
119
220
320
421
521
622
722
823
923
1023
1124
1224
1324
1424
1524
1623
1723
1822
1921
2020
2120
2219
2318
2417
2516
2615
2715
2815
2915
3015

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 25% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
182237321
292236320
3102236310
4112236310
5112236300
6122236300
7122236300
8122137300
9132137291
10142037281
11141937281
12151937281
13161837271
14171837271
15181837271
16201836261
17211835251
18231834251
19251733241
20271732231
21291731221
22311730211
23331829191
24351828181
25371827170
26391926160
27401925150
28422024150
29432023140
30442022130

Wind in September

Winds average 8 mph in September.

Across September, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze

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 6:21 AM to 6:39 AM, and sunset from 7:02 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:217:02
212.66:227:00
312.66:226:59
412.66:236:58
512.56:246:56
612.56:246:55
712.56:256:54
812.56:266:53
912.46:266:51
1012.46:276:50
1112.46:276:49
1212.36:286:47
1312.36:296:46
1412.36:296:44
1512.26:306:43
1612.26:306:42
1712.26:316:40
1812.16:326:39
1912.16:326:38
2012.16:336:36
2112.06:336:35
2212.06:346:34
2312.06:356:32
2411.96:356:31
2511.96:366:30
2611.96:376:28
2711.86:376:27
2811.86:386:26
2911.86:396:24
3011.76:396:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.38 kWh/m².

For context, solar energy here swings from a low near 3.04 kWh/m² to a high of 7.02 kWh/m² in July across the year — September's 5.38 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.8Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.6Bright
85.6Bright
95.5Bright
105.5Bright
115.4Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.0Bright
Planning a trip in September

Is September a good time to visit San Angelo?

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

5.3
Sightseeing
8th-best month of the year
7.6
Beach & pool
1st-best month of the year

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

What to pack for San Angelo in September

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

In September, San Angelo sees daytime highs around 87°F and nights near 66°F. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in San Angelo 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 San Angelo peaks around July 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 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 highHighModerateJul 18UV 11Dec 18UV 3
UV index (midday)Level
Jan4Moderate
Feb5High
Mar7High
Apr9Very high
May10Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct6High
Nov5Moderate
Dec3Moderate
Location & terrain

Where is San Angelo?

San Angelo sits at 31.5°N, 100.4°W, 1,844 ft above sea level, in United States. The nearest listed city is Abilene, 80 mi away.

Topography around San Angelo

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

Within 2 miles, the terrain around San Angelo has only modest variations in elevation — a maximum elevation change of 125 ft around an average of 1,857 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 604 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,332 ft.

The land around San Angelo is covered by artificial surfaces (60%) within 2 miles, cropland (31%) and grassland (26%) within 10 miles, and grassland (62%) within 50 miles.

2 miles
125 ft
10 miles
604 ft
50 miles
1,332 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Abilene 80 mi · Big Spring 82 mi · Brownwood 87 mi · Midland 103 mi · Odessa 117 mi · West Odessa 124 mi · Kerrville 124 mi · Breckenridge 127 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 San Angelo (31.4638°, -100.437°, elevation 1,844 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).