Stockton weather in August

In August, Stockton sees average daytime highs of 89°F and overnight lows near 61°F, with 0.1 in of rain across 0.1 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 89°F through the month. The sky is clear or mostly clear about 90% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 hours at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Stockton's 1st-clearest and 5th-windiest month. For the whole year in context, see Stockton's year-round climate.

Daytime high
89°
2nd warmest
Overnight low
61°
11th coldest
Rainfall
0.1 in
0.1 wet days
Daylight
13 h 30 min
5:25 AM – 6:54 PM
Cloud cover
10%
1st clearest
Wind
5 mph
5th windiest
Solar energy
7.45 kWh/m²
Travel score
5.8
out of 10

Stockton is county seat of San Joaquin County, California, United States.

Density
1,823/km²
people per km²
Founded
1849

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 89°F through the month.

A typical August day in Stockton reaches about 89°F in the afternoon and slips back to 61°F overnight — a 28°F spread between the day's warmth and the night's chill. On most days the high lands between 82°F and 96°F. Set against its neighbours, August runs on par with July and about 3°F warmer than September.

60°80°100°151015202531
Avg high (°F)Avg low (°F)
18961
28961
38961
48961
58961
68961
78961
88961
98961
108961
118961
128961
138961
148961
158961
168961
178960
188960
198960
208960
218960
228960
238960
248960
258960
268960
278960
288960
298860
308860
318860

How August really feels in Stockton

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.

Stockton weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan58° / 42°4.08.99.74.4
Feb62° / 44°3.88.910.55.4
Mar67° / 47°3.18.711.76.5
Apr73° / 50°1.65.2137.7
May80° / 55°0.93.4147.9
Jun87° / 59°0.20.814.66.4
Jul90° / 61°0.00.114.45.5
Aug89° / 61°0.10.113.55.8
Sep85° / 58°0.10.612.37.0
Oct77° / 53°1.02.8118.5
Nov65° / 46°1.95.89.96.6
Dec57° / 41°3.78.99.44.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 90% of the time in August, the clearest month of the year.

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

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1946
2955
3955
4955
5955
6955
7955
8955
9955
10955
11955
12955
13955
14955
15955
16955
17955
18955
19964
20964
21964
22964
23955
24955
25964
26973
27973
28973
29973
30973
31973

Chance of precipitation in August

Any precipitation

Stockton gets around 0.1 in of rain over 0.1 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 0% and peaks near 1% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
191
201
211
221
231
241
251
261
271
281
291
301
311

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 57% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1544240
2554140
3554140
4554140
5554140
6564040
7564040
8564040
9564040
10564040
11564040
12564040
13574030
14564130
15564130
16564130
17564130
18574030
19574030
20574030
21574030
22574030
23574030
24583930
25583930
26593830
27603730
28613630
29633430
30643330
31653131

Wind in August

Winds average 5 mph in August.

Across August, 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.

0246810151015202531
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
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 hours at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over August. Sunrise moves from 5:12 AM to 5:38 AM, and sunset from 7:11 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:127:11
214.05:137:10
313.95:137:09
413.95:147:08
513.95:157:07
613.85:167:06
713.85:177:05
813.85:187:03
913.75:197:02
1013.75:207:01
1113.75:207:00
1213.65:216:59
1313.65:226:57
1413.65:236:56
1513.55:246:55
1613.55:256:54
1713.45:266:52
1813.45:276:51
1913.45:286:50
2013.35:286:48
2113.35:296:47
2213.35:306:45
2313.25:316:44
2413.25:326:43
2513.15:336:41
2613.15:346:40
2713.15:356:38
2813.05:366:37
2913.05:366:35
3012.95:376:34
3112.95:386:32

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 7.45 kWh/m².

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 8.23 kWh/m² in July across the year — August's 7.45 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.9Intense
27.9Intense
37.9Intense
47.8Intense
57.8Intense
67.8Intense
77.8Intense
87.7Intense
97.7Intense
107.7Intense
117.6Intense
127.6Intense
137.6Intense
147.5Intense
157.5Intense
167.5Intense
177.4Intense
187.4Intense
197.4Intense
207.3Intense
217.3Intense
227.2Intense
237.2Intense
247.2Intense
257.1Intense
267.1Intense
277.0Intense
287.0Intense
296.9Intense
306.9Intense
316.9Intense
Planning a trip in August

Hazard calendar for Stockton

In seasonPeak

None of Stockton's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Stockton's rainy season runs November–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Stockton?

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

5.8
Sightseeing
8th-best month of the year
8.8
Beach & pool
3rd-best month of the year

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

What to pack for Stockton in August

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

In August, Stockton sees daytime highs around 89°F and nights near 61°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Stockton in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Stockton peaks around June 20 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 highVery highHighModerateJun 20UV 10Dec 14UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun10Extreme
Jul10Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Stockton 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 Stockton 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 Stockton?

Stockton sits at 38.0°N, 121.3°W, 13 ft above sea level, in United States. The nearest listed city is Lathrop, 9.3 mi away.

Topography around Stockton

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

Within 2 miles, the terrain around Stockton has only modest variations in elevation — a maximum elevation change of 69 ft around an average of 16 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 210 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,259 ft.

The land around Stockton is covered by artificial surfaces (76%) within 2 miles, cropland (39%), trees (24%) and artificial surfaces (20%) within 10 miles, and grassland (42%) and trees (25%) within 50 miles.

2 miles
69 ft
10 miles
210 ft
50 miles
4,259 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Lathrop 9.3 mi · Manteca 12 mi · Lodi 12 mi · Tracy 17 mi · Ripon 17 mi · Galt 21 mi · Brentwood 22 mi · Oakley 23 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 Stockton (37.9577°, -121.2908°, elevation 13 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).