Apache Junction weather in September

In September, Apache Junction sees average daytime highs of 95°F and overnight lows near 71°F, with 1.1 in of rain across 3.6 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 97°F in the first days to 92°F by the end. The sky is clear or mostly clear about 79% 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 Apache Junction's 4th-clearest and 7th-windiest month. For the whole year in context, see Apache Junction's year-round climate.

Daytime high
95°
4th warmest
Overnight low
71°
9th coldest
Rainfall
1.1 in
3.6 wet days
Daylight
12 h 12 min
6:14 AM – 6:27 PM
Cloud cover
24%
4th clearest
Wind
4 mph
7th windiest
Solar energy
6.05 kWh/m²
Travel score
3.3
out of 10

Apache Junction is city in Pinal and Maricopa counties in Arizona, United States.

Density
422/km²
people per km²
Founded
1978

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 97°F in the first days to 92°F by the end.

A typical September day in Apache Junction reaches about 95°F in the afternoon and slips back to 71°F overnight — a 24°F spread between the day's warmth and the night's chill. On most days the high lands between 87°F and 101°F. Set against its neighbours, September runs about 5°F cooler than August and about 10°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19875
29875
39775
49774
59774
69774
79674
89673
99673
109673
119672
129572
139572
149571
159571
169471
179470
189470
199470
209469
219469
229369
239368
249368
259367
269267
279267
289266
299166
309165

How September really feels in Apache Junction

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.

Apache Junction weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan63° / 39°1.94.4106.8
Feb66° / 42°2.14.810.87.1
Mar73° / 47°1.43.411.78.2
Apr80° / 53°0.51.612.88.2
May89° / 62°0.20.913.75.3
Jun99° / 71°0.10.714.21.9
Jul101° / 78°0.84.3141.0
Aug99° / 78°1.04.913.21.5
Sep95° / 71°1.13.612.23.3
Oct84° / 58°0.92.911.27.0
Nov72° / 47°1.02.810.38.3
Dec63° / 40°1.74.89.86.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 79% 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 11%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18515
28515
38515
48515
58614
68713
78713
88812
98812
108812
118812
128911
138911
148911
159010
169010
179010
189010
19919
20919
21919
229010
239010
249010
259010
269010
279010
288911
298911
308911

Chance of precipitation in September

Any precipitation

Apache Junction gets around 1.1 in of rain over 3.6 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 13% and peaks near 18% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
118
218
318
418
518
618
717
817
916
1016
1115
1215
1314
1414
1513
1612
1712
1811
1910
209
219
228
238
248
257
268
278
288
298
308

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 64% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
140282011
241281911
342281910
44328199
54528189
64628188
74828177
85027177
95226166
105425156
115524156
125823145
136022135
146121135
156420124
166519124
176718114
186917104
197116103
20741493
21751393
22771283
23781183
24801172
25811072
2683962
2783962
2884952
2985852
3086851

Wind in September

Winds average 4 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
134calm
144calm
154calm
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 6:04 AM to 6:24 AM, and sunset from 6:48 PM to 6:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:046:48
212.76:056:46
312.76:056:45
412.66:066:44
512.66:076:42
612.66:086:41
712.56:086:39
812.56:096:38
912.56:106:37
1012.46:106:35
1112.46:116:34
1212.36:126:32
1312.36:126:31
1412.36:136:30
1512.26:146:28
1612.26:146:27
1712.26:156:25
1812.16:166:24
1912.16:166:22
2012.16:176:21
2112.06:186:19
2212.06:196:18
2312.06:196:17
2411.96:206:15
2511.96:216:14
2611.86:216:12
2711.86:226:11
2811.86:236:10
2911.76:246:08
3011.76:246:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.05 kWh/m².

For context, solar energy here swings from a low near 3.14 kWh/m² to a high of 8.44 kWh/m² in June across the year — September's 6.05 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.0Intense
166.0Intense
176.0Intense
186.0Bright
196.0Bright
206.0Bright
215.9Bright
225.9Bright
235.9Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Is September a good time to visit Apache Junction?

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

3.3
Sightseeing
9th-best month of the year
6.8
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Apache Junction. The water and warmth also suit a beach or pool day.

What to pack for Apache Junction in September

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

In September, Apache Junction sees daytime highs around 95°F and nights near 71°F. Pack light clothes and sun protection. About 4 days see rain.

light clothessun protection

UV index in Apache Junction 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 Apache Junction 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
Jan4Moderate
Feb5Moderate
Mar5Moderate
Apr7High
May9Very high
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Apache Junction 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 Apache Junction is worst in June — around 32 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 11 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodJun 1730 µg/m³Dec 1211 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Good
Mar12Good
Apr12Good
May13Moderate
Jun32Moderate
Jul15Moderate
Aug13Moderate
Sep13Moderate
Oct13Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Apache Junction?

Apache Junction sits at 33.4°N, 111.5°W, 1,722 ft above sea level, in United States. The nearest listed city is Queen Creek, 12 mi away.

Topography around Apache Junction

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

Within 2 miles, the terrain around Apache Junction has only modest variations in elevation — a maximum elevation change of 243 ft around an average of 1,716 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,655 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,270 ft.

The land around Apache Junction is covered by artificial surfaces (57%) and shrubs (20%) within 2 miles, shrubs (51%) and artificial surfaces (22%) within 10 miles, and shrubs (54%) within 50 miles.

2 miles
243 ft
10 miles
3,655 ft
50 miles
7,270 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Queen Creek 12 mi · Gilbert 14 mi · San Tan Valley 16 mi · Mesa 16 mi · Fountain Hills 17 mi · Chandler 19 mi · Tempe 21 mi · Scottsdale 21 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 Apache Junction (33.4151°, -111.5496°, elevation 1,722 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).