Oro Valley weather in August

In August, Oro Valley sees average daytime highs of 93°F and overnight lows near 74°F, with 2.1 in of rain across 11.6 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 93°F through the month. The sky is clear or mostly clear about 50% 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 Oro Valley's 11th-clearest and 12th-windiest month. For the whole year in context, see Oro Valley's year-round climate.

Daytime high
93°
3rd warmest
Overnight low
74°
11th coldest
Rainfall
2.1 in
11.6 wet days
Daylight
13 h 12 min
5:52 AM – 7:04 PM
Cloud cover
43%
11th clearest
Wind
4 mph
12th windiest
Solar energy
6.67 kWh/m²
Travel score
3.0
out of 10

Oro Valley is town in Pima County, Arizona, United States.

Density
491/km²
people per km²
Founded
1974

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 93°F through the month.

A typical August day in Oro Valley reaches about 93°F in the afternoon and slips back to 74°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 86°F and 100°F. Set against its neighbours, August runs about 2°F cooler than July and about 3°F warmer than September.

70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
19475
29475
39475
49475
59475
69475
79475
89475
99475
109474
119474
129474
139474
149474
159474
169474
179474
189374
199374
209374
219374
229374
239374
249373
259373
269373
279373
289373
299373
309273
319273

How August really feels in Oro Valley

Once humidity and wind are folded in, August averages 31 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
31
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Oro Valley 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
Jan61° / 41°1.54.50.510.16.2
Feb64° / 43°1.54.70.410.86.9
Mar71° / 48°0.93.50.211.88.0
Apr78° / 54°0.41.60.112.88.7
May87° / 62°0.21.2013.66.2
Jun96° / 71°0.21.4014.13.1
Jul95° / 76°2.310.4013.92.5
Aug93° / 74°2.111.6013.23.0
Sep90° / 69°1.34.9012.24.6
Oct82° / 59°0.73011.27.8
Nov70° / 48°0.930.110.38.1
Dec61° / 41°1.54.40.29.96.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 26% of August, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26733
36832
46931
56931
67129
77228
87228
97327
107525
117525
127525
137624
147624
157624
167723
177723
187822
197822
207822
217822
227921
237822
247921
257921
267921
278020
288020
298020
308119
318218

Chance of precipitation in August

Any precipitation

Oro Valley gets around 2.1 in of rain over 11.6 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 37% and peaks near 41% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
240
340
440
540
639
739
839
938
1038
1138
1237
1337
1437
1537
1637
1737
1837
1937
2037
2136
2236
2336
2435
2535
2634
2733
2833
2932
3031
3130

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. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1242227261
2232228251
3232229251
4232229251
5232230241
6232230241
7232331231
8232331221
9232332211
10232432211
11232433201
12232433191
13232433191
14232434181
15232534181
16232534171
17232534171
18232534171
19232535161
20232535161
21242535161
22242435161
23242435161
24252435161
25262334161
26262334161
27272334160
28282333160
29292233160
30302232150
31312232150

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 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
265calm
275calm
285calm
295calm
305calm
315calm

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 5:42 AM to 6:02 AM, and sunset from 7:18 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:427:18
213.65:427:17
313.65:437:17
413.55:447:16
513.55:447:15
613.55:457:14
713.55:467:13
813.45:467:12
913.45:477:11
1013.45:487:10
1113.35:497:09
1213.35:497:08
1313.35:507:07
1413.35:517:06
1513.25:517:05
1613.25:527:04
1713.25:537:03
1813.15:537:02
1913.15:547:01
2013.15:556:59
2113.05:556:58
2213.05:566:57
2313.05:576:56
2413.05:576:55
2512.95:586:53
2612.95:596:52
2712.95:596:51
2812.86:006:50
2912.86:016:48
3012.86:016:47
3112.76:026:46

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.67 kWh/m².

For context, solar energy here swings from a low near 3.32 kWh/m² to a high of 8.36 kWh/m² in June across the year — August's 6.67 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.9Intense
56.8Intense
66.8Intense
76.8Intense
86.8Intense
96.8Intense
106.8Intense
116.8Intense
126.8Intense
136.8Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.6Intense
206.6Intense
216.6Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.4Intense
286.4Intense
296.4Intense
306.3Intense
316.3Intense
Planning a trip in August

Is August a good time to visit Oro Valley?

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

3.0
Sightseeing
11th-best month of the year
6.0
Beach & pool
6th-best month of the year

August is a weaker month for outdoor sightseeing in Oro Valley.

What to pack for Oro Valley in August

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

In August, Oro Valley sees daytime highs around 93°F and nights near 74°F. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

UV index in Oro Valley in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Oro Valley peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 23UV 11Dec 20UV 4
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar6High
Apr9Very high
May9Very high
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct7High
Nov5Moderate
Dec3Moderate

Air quality in Oro Valley in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Oro Valley 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 Oro Valley?

Oro Valley sits at 32.4°N, 111.0°W, 2,618 ft above sea level, in United States. The nearest listed city is Casas Adobes, 5.0 mi away.

Topography around Oro Valley

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

Within 2 miles, the terrain around Oro Valley has large variations in elevation — a maximum elevation change of 2,694 ft around an average of 2,730 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 6,654 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,854 ft.

The land around Oro Valley is covered by shrubs (60%) and artificial surfaces (32%) within 2 miles, shrubs (66%) and artificial surfaces (24%) within 10 miles, and shrubs (79%) within 50 miles.

2 miles
2,694 ft
10 miles
6,654 ft
50 miles
7,854 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrain
August weather nearby: Casas Adobes 5.0 mi · Catalina Foothills 6.8 mi · Flowing Wells 7.5 mi · Tucson 12 mi · Marana 16 mi · Tanque Verde 17 mi · Drexel Heights 17 mi · Vail 28 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 Oro Valley (32.3909°, -110.9665°, elevation 2,618 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).