Sun City weather in September

In September, Sun City sees average daytime highs of 99°F and overnight lows near 76°F, with 0.9 in of rain across 2.9 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 102°F in the first days to 96°F by the end. The sky is clear or mostly clear about 80% of the time in September, and the air most often feels dry.

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 Sun City's 3rd-clearest and 6th-windiest month. For the whole year in context, see Sun City's year-round climate.

Daytime high
99°
4th warmest
Overnight low
76°
9th coldest
Rainfall
0.9 in
2.9 wet days
Daylight
12 h 12 min
6:17 AM – 6:30 PM
Cloud cover
22%
3rd clearest
Wind
5 mph
6th windiest
Solar energy
6.1 kWh/m²
Travel score
1.9
out of 10

Sun City is census designated place in Maricopa County, Arizona, United States.

Density
996/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 102°F in the first days to 96°F by the end.

A typical September day in Sun City reaches about 99°F in the afternoon and slips back to 76°F overnight — a 23°F spread between the day's warmth and the night's chill. On most days the high lands between 91°F and 106°F. Set against its neighbours, September runs about 5°F cooler than August and about 11°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
110280
210280
310280
410180
510179
610179
710179
810078
910078
1010078
1110077
1210077
139977
149976
159976
169976
179975
189875
199874
209874
219874
229873
239773
249773
259772
269672
279671
289671
299571
309570

How September really feels in Sun City

Once humidity and wind are folded in, September averages 30 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
30
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.

Sun City weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan66° / 43°1.13.4107.5
Feb70° / 46°1.33.910.87.7
Mar77° / 52°0.92.711.78.4
Apr85° / 58°0.31.212.87.0
May94° / 68°0.10.813.73.8
Jun103° / 76°0.10.314.20.6
Jul105° / 83°0.73.2140.0
Aug104° / 83°1.1413.20.2
Sep99° / 76°0.92.912.21.9
Oct88° / 63°0.71.911.25.8
Nov75° / 51°0.6210.38.6
Dec65° / 43°1.03.29.87.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 80% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 10%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18713
28713
38713
48713
58812
68812
78911
88911
99010
109010
119010
129010
139010
14919
15919
16928
17928
18928
19928
20928
21928
22928
23919
24919
25919
26919
27919
28919
299010
309010

Chance of precipitation in September

Any precipitation

Sun City gets around 0.9 in of rain over 2.9 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 10% and peaks near 14% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
114
214
314
414
514
614
713
813
913
1013
1112
1212
1311
1411
1510
1610
179
189
198
208
217
227
237
246
256
266
276
286
296
306

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 62% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1372123145
2382122145
3392122134
4412122134
5422121133
6442120123
7462020123
8472019112
9492018112
10511917112
11521916112
12561815101
13581714101
14591713101
15611612101
1664151191
1766141091
186813991
197012981
207211881
217311781
227610671
23779671
24798571
25808561
26817561
27827551
28837451
29847441
30856441

Wind in September

Winds average 5 mph in September.

Across September, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
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 6:07 AM to 6:27 AM, and sunset from 6:51 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:076:51
212.76:086:49
312.76:086:48
412.66:096:47
512.66:106:45
612.66:106:44
712.56:116:42
812.56:126:41
912.56:126:40
1012.46:136:38
1112.46:146:37
1212.36:146:35
1312.36:156:34
1412.36:166:32
1512.26:176:31
1612.26:176:30
1712.26:186:28
1812.16:196:27
1912.16:196:25
2012.16:206:24
2112.06:216:22
2212.06:216:21
2312.06:226:19
2411.96:236:18
2511.96:246:17
2611.86:246:15
2711.86:256:14
2811.86:266:12
2911.76:266:11
3011.76:276:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.1 kWh/m².

For context, solar energy here swings from a low near 3.17 kWh/m² to a high of 8.47 kWh/m² in June across the year — September's 6.1 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.4Intense
36.4Intense
46.4Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.0Intense
196.0Intense
206.0Bright
216.0Bright
225.9Bright
235.9Bright
245.9Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.7Bright
305.7Bright
Planning a trip in September

Is September a good time to visit Sun City?

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

1.9
Sightseeing
9th-best month of the year
5.3
Beach & pool
6th-best month of the year

September is a weaker month for outdoor sightseeing in Sun City.

What to pack for Sun City in September

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

In September, Sun City sees daytime highs around 99°F and nights near 76°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Sun City 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 Sun City peaks around June 23 at about 11 (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 — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 11Dec 20UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar4Moderate
Apr7High
May9Very high
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Sun City 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 Sun City is worst in June — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodGoodJun 1917 µg/m³Dec 149 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar11Good
Apr12Moderate
May12Moderate
Jun17Moderate
Jul15Moderate
Aug12Good
Sep11Good
Oct13Moderate
Nov10Good
Dec9Good
Location & terrain

Where is Sun City?

Sun City sits at 33.6°N, 112.3°W, 1,142 ft above sea level, in United States. The nearest listed city is Peoria, 2.5 mi away.

Topography around Sun City

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

Within 2 miles, the terrain around Sun City has only modest variations in elevation — a maximum elevation change of 105 ft around an average of 1,142 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,220 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,988 ft.

The land around Sun City is covered by artificial surfaces (77%) within 2 miles, artificial surfaces (60%) within 10 miles, and shrubs (55%) within 50 miles.

2 miles
105 ft
10 miles
1,220 ft
50 miles
6,988 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Peoria 2.5 mi · El Mirage 3.1 mi · Surprise 4.3 mi · Sun City West 6.2 mi · Glendale 6.2 mi · Maryvale 8.7 mi · Deer Valley 9.9 mi · Alhambra 11 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 Sun City (33.5975°, -112.2718°, elevation 1,142 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).