Vail weather in September

In September, Vail sees average daytime highs of 89°F and overnight lows near 66°F, with 1.3 in of rain across 5.7 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 91°F in the first days to 87°F by the end. The sky is clear or mostly clear about 72% 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 Vail's 5th-clearest and 10th-windiest month. For the whole year in context, see Vail's year-round climate.

Daytime high
89°
4th warmest
Overnight low
66°
9th coldest
Rainfall
1.3 in
5.7 wet days
Daylight
12 h 12 min
6:11 AM – 6:23 PM
Cloud cover
29%
5th clearest
Wind
5 mph
10th windiest
Solar energy
6.02 kWh/m²
Travel score
5.0
out of 10

Vail is census designated place in Pima County, Arizona, United States.

Density
174/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 91°F in the first days to 87°F by the end.

A typical September day in Vail reaches about 89°F in the afternoon and slips back to 66°F overnight — a 22°F spread between the day's warmth and the night's chill. On most days the high lands between 82°F and 95°F. Set against its neighbours, September runs about 3°F cooler than August and about 8°F warmer than October.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
19170
29169
39169
49069
59069
69069
79069
89068
99068
108968
118968
128967
138967
148967
158967
168967
178966
188966
198866
208866
218865
228865
238865
248864
258764
268764
278764
288763
298763
308662

How September really feels in Vail

Once humidity and wind are folded in, September averages 9 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
9
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.

Vail 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 daysSnow daysDaylight (hours)Travel score
Jan62° / 38°1.03.80.510.16.4
Feb65° / 41°1.14.20.310.87.0
Mar71° / 46°0.62.90.211.88.2
Apr78° / 51°0.31.7012.88.8
May87° / 59°0.10.9013.66.4
Jun95° / 69°0.31.9014.13.3
Jul94° / 73°2.111.1013.92.9
Aug92° / 71°1.810.6013.23.5
Sep89° / 66°1.35.7012.25.0
Oct81° / 56°0.62.7011.28.0
Nov70° / 46°0.72.8010.48.2
Dec61° / 38°1.24.30.39.96.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 72% 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 13%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18119
28119
38218
48317
58416
68416
78614
88614
98614
108713
118713
128812
138812
148812
158812
168812
178911
188911
198911
208911
218911
228911
238911
248812
258911
268911
278911
288911
298911
308911

Chance of precipitation in September

Any precipitation

Vail gets around 1.3 in of rain over 5.7 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 29% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
328
428
528
627
727
826
925
1024
1124
1223
1322
1421
1520
1619
1718
1817
1916
2015
2114
2214
2313
2413
2512
2612
2712
2811
2911
3011

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 60% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13724326
23825326
33825316
43926305
54026295
64227274
74327264
84428244
94628234
104828213
115027203
125227183
135426173
145626153
155725144
165924134
176322114
186521104
19672094
20701893
21721783
22751573
23761473
24771373
25791263
26811162
27821062
28831052
2985951
3086941

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
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 6:02 AM to 6:20 AM, and sunset from 6:43 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:026:43
212.76:036:42
312.66:036:41
412.66:046:39
512.66:046:38
612.56:056:37
712.56:066:35
812.56:066:34
912.46:076:33
1012.46:086:31
1112.46:086:30
1212.36:096:28
1312.36:096:27
1412.36:106:26
1512.26:116:24
1612.26:116:23
1712.26:126:22
1812.16:136:20
1912.16:136:19
2012.16:146:17
2112.06:156:16
2212.06:156:15
2312.06:166:13
2411.96:176:12
2511.96:176:11
2611.96:186:09
2711.86:186:08
2811.86:196:07
2911.86:206:05
3011.76:206:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.02 kWh/m².

For context, solar energy here swings from a low near 3.45 kWh/m² to a high of 8.29 kWh/m² in June across the year — September's 6.02 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.0Intense
156.0Intense
166.0Intense
176.0Intense
186.0Bright
196.0Bright
206.0Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.7Bright
Planning a trip in September

Is September a good time to visit Vail?

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

5.0
Sightseeing
9th-best month of the year
7.6
Beach & pool
4th-best month of the year

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

What to pack for Vail in September

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

In September, Vail sees daytime highs around 89°F and nights near 66°F. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Vail 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 Vail peaks around June 22 at about 11 (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 22UV 11Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb5High
Mar6High
Apr9Very high
May9Very high
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct7High
Nov5Moderate
Dec4Moderate

Air quality in Vail 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 Vail is worst in June — around 15 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 1715 µg/m³Dec 219 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar11Good
Apr12Good
May11Good
Jun15Moderate
Jul12Moderate
Aug11Good
Sep11Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Vail?

Vail sits at 32.0°N, 110.7°W, 0 ft above sea level, in United States. The nearest listed city is Tanque Verde, 14 mi away.

Topography around Vail

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

Within 2 miles, the terrain around Vail has only modest variations in elevation — a maximum elevation change of 374 ft around an average of 3,212 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,583 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,421 ft.

The land around Vail is covered by shrubs (77%) within 2 miles, shrubs (88%) within 10 miles, and shrubs (76%) within 50 miles.

2 miles
374 ft
10 miles
3,583 ft
50 miles
7,421 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Tanque Verde 14 mi · Sahuarita 16 mi · Tucson 17 mi · Drexel Heights 20 mi · Catalina Foothills 21 mi · Green Valley 21 mi · Flowing Wells 24 mi · Casas Adobes 25 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 Vail (32.0479°, -110.712°, elevation 0 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).