Sierra Vista weather in August

In August, Sierra Vista sees average daytime highs of 87°F and overnight lows near 65°F, with 2.5 in of rain across 12.8 wet days and about 13.2 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 87°F through the month. The sky is clear or mostly clear about 40% of the time in August, and the air most often feels humid.

Daylight stretches from about 13 h 36 min at the start of August to 12 h 42 min by month's end. Set against the rest of the year, August is Sierra Vista's 11th-clearest and 12th-windiest month. For the whole year in context, see Sierra Vista's year-round climate.

Daytime high
87°
3rd warmest
Overnight low
65°
11th coldest
Rainfall
2.5 in
12.8 wet days
Daylight
13 h 12 min
5:50 AM – 7:00 PM
Cloud cover
49%
11th clearest
Wind
4 mph
12th windiest
Solar energy
6.52 kWh/m²
Travel score
4.6
out of 10

Sierra Vista is city in Cochise County, Arizona, United States.

Density
110/km²
people per km²
Founded
1956

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 87°F through the month.

A typical August day in Sierra Vista reaches about 87°F in the afternoon and slips back to 65°F overnight — a 22°F spread between the day's warmth and the night's chill. On most days the high lands between 81°F and 93°F. Set against its neighbours, August runs about 3°F cooler than July and about 3°F warmer than September.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18766
28766
38766
48766
58766
68766
78766
88766
98766
108766
118766
128765
138765
148765
158765
168765
178765
188765
198765
208765
218765
228765
238765
248765
258765
268765
278765
288665
298665
308665
318664

How August really feels in Sierra Vista

Once humidity and wind are folded in, August averages 0 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
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Sierra Vista weather by month

How August compares with the rest of the year at a glance. August is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan59° / 35°0.93.60.610.25.6
Feb62° / 37°0.840.510.86.4
Mar68° / 41°0.52.70.411.87.9
Apr75° / 46°0.21.50.112.78.8
May84° / 53°0.21.6013.67.3
Jun92° / 62°0.42.90144.3
Jul90° / 67°2.712.8013.83.8
Aug87° / 65°2.512.8013.24.6
Sep84° / 62°1.46.1012.26.3
Oct77° / 52°0.52.9011.28.5
Nov67° / 43°0.62.30.110.47.8
Dec58° / 35°0.93.91.1105.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 27% of August, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36337
46436
56436
66535
76535
86634
96634
106733
116733
126733
136733
146733
156733
166733
176733
186733
196832
206832
216832
226832
236832
246931
257030
267030
277030
287228
297228
307228
317327

Chance of precipitation in August

Any precipitation

Sierra Vista gets around 2.5 in of rain over 12.8 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 49% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
149
249
348
448
547
646
745
845
944
1043
1143
1242
1342
1441
1541
1641
1741
1840
1940
2040
2139
2239
2338
2438
2537
2636
2735
2834
2934
3033
3133

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 33% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12434384
22433384
32533384
42533384
52633384
62633383
72733373
82833363
92932363
102932353
113033353
123033343
133133343
143133343
153133342
163133332
173233332
183233332
193233332
203333331
213333321
223433321
233433321
243533311
253633310
263733300
273832290
284032280
294131270
304331260
314431250

Wind in August

Winds average 4 mph in August, the calmest month.

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

0246810151015202531
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 36 min at the start of August to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over August. Sunrise moves from 5:41 AM to 6:00 AM, and sunset from 7:14 PM to 6:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:417:14
213.55:417:13
313.55:427:12
413.55:437:12
513.55:437:11
613.45:447:10
713.45:457:09
813.45:457:08
913.45:467:07
1013.35:477:06
1113.35:477:05
1213.35:487:04
1313.25:487:03
1413.25:497:02
1513.25:507:01
1613.25:507:00
1713.15:516:59
1813.15:526:58
1913.15:526:57
2013.05:536:56
2113.05:546:55
2213.05:546:53
2313.05:556:52
2412.95:566:51
2512.95:566:50
2612.95:576:49
2712.85:586:48
2812.85:586:46
2912.85:596:45
3012.75:596:44
3112.76:006:42

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.52 kWh/m².

For context, solar energy here swings from a low near 3.52 kWh/m² to a high of 8.28 kWh/m² in May across the year — August's 6.52 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.6Intense
56.6Intense
66.6Intense
76.6Intense
86.6Intense
96.6Intense
106.6Intense
116.6Intense
126.6Intense
136.6Intense
146.6Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in August

Is August a good time to visit Sierra Vista?

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

4.6
Sightseeing
10th-best month of the year
6.5
Beach & pool
6th-best month of the year

August is a reasonable time to visit Sierra Vista for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sierra Vista in August

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

In August, Sierra Vista sees daytime highs around 87°F and nights near 65°F. Pack light clothes and sun protection. Worth having: rain gear. About 13 days see rain.

light clothessun protectionrain gear

UV index in Sierra Vista in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sierra Vista peaks around June 22 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 22UV 12Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb5High
Mar7High
Apr10Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep10Very high
Oct7Very high
Nov5High
Dec4Moderate
Location & terrain

Where is Sierra Vista?

Sierra Vista sits at 31.6°N, 110.3°W, 4,633 ft above sea level, in United States. The nearest listed city is Cananea, 39 mi away.

Topography around Sierra Vista

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

Within 2 miles, the terrain around Sierra Vista has only modest variations in elevation — a maximum elevation change of 377 ft around an average of 4,646 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,213 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,077 ft.

The land around Sierra Vista is covered by grassland (32%), artificial surfaces (32%) and shrubs (31%) within 2 miles, shrubs (62%) within 10 miles, and shrubs (67%) and grassland (23%) within 50 miles.

2 miles
377 ft
10 miles
5,213 ft
50 miles
7,077 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrain
August weather nearby: Cananea 39 mi · Nogales 40 mi · Rio Rico 40 mi · Nogales 41 mi · Vail 42 mi · Green Valley 45 mi · Douglas 47 mi · Sahuarita 47 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 Sierra Vista (31.5545°, -110.3037°, elevation 4,633 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).