Douglas weather in September

In September, Douglas sees average daytime highs of 88°F and overnight lows near 64°F, with 1.2 in of rain across 5.1 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 90°F in the first days to 86°F by the end. The sky is clear or mostly clear about 69% 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 Douglas's 6th-clearest and 10th-windiest month. For the whole year in context, see Douglas's year-round climate.

Daytime high
88°
4th warmest
Overnight low
64°
9th coldest
Rainfall
1.2 in
5.1 wet days
Daylight
12 h 12 min
6:07 AM – 6:18 PM
Cloud cover
32%
6th clearest
Wind
5 mph
10th windiest
Solar energy
6.03 kWh/m²
Travel score
5.3
out of 10

Douglas is city in Cochise County, Arizona, United States.

Density
642/km²
people per km²
Founded
1905

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 86°F by the end.

A typical September day in Douglas reaches about 88°F in the afternoon and slips back to 64°F overnight — a 24°F spread between the day's warmth and the night's chill. On most days the high lands between 82°F and 93°F. Set against its neighbours, September runs about 3°F cooler than August and about 7°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19067
29067
39067
48967
58966
68966
78966
88966
98966
108965
118865
128865
138865
148865
158865
168864
178864
188764
198764
208763
218763
228763
238763
248762
258762
268762
278662
288661
298661
308660

How September really feels in Douglas

Once humidity and wind are folded in, September averages 3 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
3
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.

Douglas weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan62° / 36°1.13.510.26.4
Feb65° / 39°0.93.710.97.2
Mar72° / 44°0.6311.88.3
Apr79° / 49°0.21.312.78.5
May88° / 58°0.21.213.66.0
Jun95° / 67°0.42.1143.1
Jul93° / 70°2.010.413.83.0
Aug91° / 68°1.81113.13.8
Sep88° / 64°1.25.112.25.3
Oct80° / 54°0.73.211.28.0
Nov70° / 44°0.82.410.48.1
Dec61° / 36°1.14.5106.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 15%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
28020
38020
48020
58119
68119
78218
88317
98416
108416
118515
128515
138515
148515
158515
168713
178713
188713
198713
208713
218713
228713
238713
248713
258713
268713
278812
288812
298812
308812

Chance of precipitation in September

Any precipitation

Douglas gets around 1.2 in of rain over 5.1 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 18% and peaks near 27% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
326
426
526
625
724
824
923
1022
1121
1221
1320
1419
1518
1617
1716
1815
1914
2013
2112
2212
2311
2411
2510
2610
2710
2810
2910
3010

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 (%)
14527281
24627271
34727251
44827241
55027231
65027221
75127211
85227201
95427181
105427181
115527171
125726161
135826151
145925142
156025132
166224122
176423112
186621112
196820102
20701992
21731782
22741682
23761572
24771472
25791362
26811252
27821251
28841141
29841141
30861031

Wind in September

Winds average 5 mph in September.

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

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
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 5:58 AM to 6:16 AM, and sunset from 6:38 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:586:38
212.65:586:37
312.65:596:35
412.66:006:34
512.56:006:33
612.56:016:32
712.56:016:30
812.46:026:29
912.46:036:28
1012.46:036:26
1112.46:046:25
1212.36:046:24
1312.36:056:22
1412.36:066:21
1512.26:066:20
1612.26:076:18
1712.26:076:17
1812.16:086:15
1912.16:096:14
2012.16:096:13
2112.06:106:11
2212.06:116:10
2312.06:116:09
2411.96:126:07
2511.96:126:06
2611.96:136:05
2711.86:146:03
2811.86:146:02
2911.86:156:01
3011.76:165:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.03 kWh/m².

For context, solar energy here swings from a low near 3.5 kWh/m² to a high of 8.26 kWh/m² in May across the year — September's 6.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.0Intense
146.0Intense
156.0Intense
166.0Intense
176.0Bright
186.0Bright
196.0Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Is September a good time to visit Douglas?

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

5.3
Sightseeing
9th-best month of the year
7.8
Beach & pool
4th-best month of the year

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

What to pack for Douglas in September

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

In September, Douglas sees daytime highs around 88°F and nights near 64°F. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Douglas in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Douglas peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 highHighModerateJun 20UV 12Dec 19UV 4
UV index (midday)Level
Jan5Moderate
Feb5High
Mar8Very high
Apr10Very high
May10Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep10Very high
Oct7Very high
Nov5High
Dec4Moderate
Location & terrain

Where is Douglas?

Douglas sits at 31.3°N, 109.5°W, 4,009 ft above sea level, in United States. The nearest listed city is Agua Prieta, 1.2 mi away.

Topography around Douglas

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

Within 2 miles, the terrain around Douglas has only modest variations in elevation — a maximum elevation change of 246 ft around an average of 4,009 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,142 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,218 ft.

The land around Douglas is covered by artificial surfaces (50%) and shrubs (36%) within 2 miles, shrubs (72%) within 10 miles, and shrubs (64%) and grassland (26%) within 50 miles.

2 miles
246 ft
10 miles
2,142 ft
50 miles
7,218 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Agua Prieta 1.2 mi · Sierra Vista 47 mi · Cananea 51 mi · Nogales 82 mi · Nogales 83 mi · Vail 84 mi · Rio Rico 85 mi · Green Valley 92 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 Douglas (31.3446°, -109.5453°, elevation 4,009 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).