Oakley weather in July

In July, Oakley sees average daytime highs of 84°F and overnight lows near 59°F, with 0.0 in of rain across 0.2 wet days and about 14.4 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 84°F through the month. The sky is clear or mostly clear about 91% of the time in July, and the air most often feels dry.

Daylight stretches from about 14 h 36 min at the start of July to 14 hours by month's end. Set against the rest of the year, July is Oakley's 1st-clearest and 2nd-windiest month. For the whole year in context, see Oakley's year-round climate.

Daytime high
84°
1st warmest
Overnight low
59°
11th coldest
Rainfall
0.0 in
0.2 wet days
Daylight
14 h 24 min
5:01 AM – 7:24 PM
Cloud cover
10%
1st clearest
Wind
8 mph
2nd windiest
Solar energy
8.13 kWh/m²
Travel score
7.7
out of 10

Oakley is city in Contra Costa County, California, United States.

Density
950/km²
people per km²
Founded
1999

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 84°F through the month.

A typical July day in Oakley reaches about 84°F in the afternoon and slips back to 59°F overnight — a 25°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 92°F. Set against its neighbours, July runs about 2°F warmer than June and on par with August.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18458
28459
38459
48459
58459
68459
78459
88459
98459
108459
118459
128459
138459
148459
158459
168459
178459
188459
198459
208459
218459
228459
238459
248459
258459
268459
278459
288459
298459
308459
318459

Oakley weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan57° / 43°3.799.74.2
Feb61° / 45°3.58.810.55.2
Mar66° / 48°2.78.311.76.4
Apr70° / 50°1.24.7137.6
May76° / 54°0.63148.5
Jun82° / 57°0.10.714.68.3
Jul84° / 59°0.00.214.47.7
Aug84° / 59°0.10.213.57.7
Sep82° / 58°0.00.312.38.3
Oct76° / 54°0.92.8118.6
Nov65° / 47°1.85.49.96.6
Dec57° / 43°3.48.49.44.3

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 91% of the time in July, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 4% of July, with mostly cloudy or overcast conditions the remaining 5%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1937
2937
3946
4946
5946
6955
7964
8964
9964
10964
11964
12964
13964
14955
15955
16955
17955
18946
19946
20946
21946
22946
23946
24946
25946
26946
27946
28946
29946
30946
31946

Chance of precipitation in July

Any precipitation

Oakley gets around 0.0 in of rain over 0.2 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 1% and peaks near 1% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
11
21
31
41
51
61
71
80
90
100
110
121
131
141
151
161
171
181
191
201
211
221
231
241
251
261
271
281
291
301
311

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the dry band about 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
165341
264351
363361
462371
561381
660391
759401
858411
957421
1056431
1155441
1254451
1353461
1450482
1549492
1648502
1747512
1846522
1945523
2044533
2144533
2244533
2344533
2444533
2544533
2644533
2745523
2845523
2945523
3046513
3146513

Wind in July

Winds average 8 mph in July.

Across July, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 36 min at the start of July to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over July. Sunrise moves from 4:52 AM to 5:12 AM, and sunset from 7:28 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.64:527:28
214.64:527:28
314.64:537:28
414.64:537:28
514.64:547:28
614.64:547:28
714.54:557:28
814.54:557:27
914.54:567:27
1014.54:577:27
1114.54:577:26
1214.54:587:26
1314.54:597:26
1414.44:597:25
1514.45:007:25
1614.45:017:24
1714.45:017:24
1814.45:027:23
1914.35:037:23
2014.35:047:22
2114.35:047:21
2214.35:057:21
2314.25:067:20
2414.25:077:19
2514.25:077:19
2614.25:087:18
2714.15:097:17
2814.15:107:16
2914.15:117:15
3014.05:127:14
3114.05:127:13

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 8.13 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.16 kWh/m² to a high of 8.13 kWh/m² in June across the year — July's 8.13 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.3Intense
28.3Intense
38.3Intense
48.3Intense
58.3Intense
68.3Intense
78.3Intense
88.2Intense
98.2Intense
108.2Intense
118.2Intense
128.2Intense
138.2Intense
148.2Intense
158.1Intense
168.1Intense
178.1Intense
188.1Intense
198.1Intense
208.1Intense
218.0Intense
228.0Intense
238.0Intense
248.0Intense
258.0Intense
267.9Intense
277.9Intense
287.9Intense
297.9Intense
307.8Intense
317.8Intense
Planning a trip in July

Is July a good time to visit Oakley?

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

7.7
Sightseeing
5th-best month of the year
9.5
Beach & pool
2nd-best month of the year

July is one of the better times to visit Oakley for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Oakley in July

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

In July, Oakley sees daytime highs around 84°F and nights near 59°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Oakley in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 Oakley peaks around June 22 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 22UV 10Dec 15UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun10Very high
Jul10Very high
Aug10Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Low

Air quality in Oakley in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Oakley is worst in August — around 27 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (June, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 2126 µg/m³Jun 138 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar15Moderate
Apr12Good
May9Good
Jun8Good
Jul11Good
Aug27Moderate
Sep23Moderate
Oct17Moderate
Nov19Moderate
Dec14Moderate
Location & terrain

Where is Oakley?

Oakley sits at 38.0°N, 121.7°W, 20 ft above sea level, in United States. The nearest listed city is Brentwood, 4.3 mi away.

Topography around Oakley

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

Within 2 miles, the terrain around Oakley has only modest variations in elevation — a maximum elevation change of 125 ft around an average of 30 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,857 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,452 ft.

The land around Oakley is covered by artificial surfaces (38%) within 2 miles, grassland (35%) and cropland (26%) within 10 miles, and grassland (35%) and trees (21%) within 50 miles.

2 miles
125 ft
10 miles
1,857 ft
50 miles
4,452 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: Brentwood 4.3 mi · Antioch 5.0 mi · Pittsburg 9.3 mi · Bay Point 14 mi · Concord 17 mi · Pleasant Hill 19 mi · Danville 20 mi · Walnut Creek 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 Oakley (37.9974°, -121.7125°, elevation 20 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).