Manteca weather in August

In August, Manteca sees average daytime highs of 90°F and overnight lows near 61°F, with 0.0 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 90°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 Manteca's 1st-clearest and 7th-windiest month. For the whole year in context, see Manteca's year-round climate.

Daytime high
90°
2nd warmest
Overnight low
61°
11th coldest
Rainfall
0.0 in
0.1 wet days
Daylight
13 h 30 min
5:25 AM – 6:53 PM
Cloud cover
10%
1st clearest
Wind
5 mph
7th windiest
Solar energy
7.5 kWh/m²
Travel score
5.3
out of 10

Manteca is city in San Joaquin County, California, United States.

Density
1,640/km²
people per km²
Founded
1861

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 90°F through the month.

A typical August day in Manteca reaches about 90°F in the afternoon and slips back to 61°F overnight — a 29°F spread between the day's warmth and the night's chill. On most days the high lands between 84°F and 97°F. Set against its neighbours, August runs on par with July and about 4°F warmer than September.

60°80°100°151015202531
Avg high (°F)Avg low (°F)
19162
29162
39162
49162
59162
69162
79162
89162
99162
109162
119162
129162
139162
149162
159162
169061
179061
189061
199061
209061
219061
229061
239061
249061
259061
269061
279061
288961
298961
308961
318961

How August really feels in Manteca

Once humidity and wind are folded in, August averages 27 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
27
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.

Manteca 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°3.38.69.74.5
Feb62° / 44°3.08.510.55.5
Mar67° / 47°2.68.211.76.6
Apr73° / 50°1.34.812.97.8
May81° / 55°0.73147.8
Jun88° / 60°0.10.814.65.8
Jul92° / 62°0.0014.34.8
Aug90° / 61°0.00.113.55.3
Sep86° / 58°0.10.612.36.7
Oct78° / 53°0.82.4118.6
Nov66° / 46°1.65.2106.8
Dec58° / 41°2.97.99.44.6

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 6% of August, with mostly cloudy or overcast conditions the remaining 5%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1946
2946
3946
4946
5955
6955
7955
8955
9955
10955
11955
12955
13964
14964
15964
16964
17964
18964
19964
20964
21964
22964
23964
24964
25964
26964
27964
28964
29964
30964
31964

Chance of precipitation in August

Any precipitation

Manteca gets around 0.0 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 56% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1534160
2534160
3544060
4544060
5544060
6553960
7553960
8553960
9553960
10563950
11563950
12563950
13563950
14563950
15554050
16554050
17554050
18554050
19554050
20554050
21554050
22563950
23563950
24583840
25583840
26593740
27603640
28603541
29613441
30633241
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 7:10 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:127:10
213.95:137:09
313.95:137:08
413.95:147:07
513.85:157:06
613.85:167:05
713.85:177:04
813.85:187:03
913.75:197:02
1013.75:207:01
1113.65:206:59
1213.65:216:58
1313.65:226:57
1413.55:236:56
1513.55:246:54
1613.55:256:53
1713.45:266:52
1813.45:276:50
1913.45:276:49
2013.35:286:48
2113.35:296:46
2213.25:306:45
2313.25:316:44
2413.25:326:42
2513.15:336:41
2613.15:346:39
2713.15:356:38
2813.05:356:36
2913.05:366:35
3012.95:376:33
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 7.5 kWh/m².

For context, solar energy here swings from a low near 2.27 kWh/m² to a high of 8.27 kWh/m² in July across the year — August's 7.5 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.0Intense
27.9Intense
37.9Intense
47.9Intense
57.8Intense
67.8Intense
77.8Intense
87.8Intense
97.7Intense
107.7Intense
117.7Intense
127.7Intense
137.6Intense
147.6Intense
157.5Intense
167.5Intense
177.5Intense
187.4Intense
197.4Intense
207.4Intense
217.3Intense
227.3Intense
237.2Intense
247.2Intense
257.2Intense
267.1Intense
277.1Intense
287.0Intense
297.0Intense
307.0Intense
316.9Intense
Planning a trip in August

Is August a good time to visit Manteca?

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

5.3
Sightseeing
9th-best month of the year
8.6
Beach & pool
3rd-best month of the year

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

What to pack for Manteca in August

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

In August, Manteca sees daytime highs around 90°F and nights near 61°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Manteca in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Manteca peaks around June 21 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 21UV 10Dec 17UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun10Extreme
Jul10Very high
Aug10Very high
Sep6High
Oct5High
Nov2Moderate
Dec2Moderate

Air quality in Manteca 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 Manteca is worst in August — around 34 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (June, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 1832 µg/m³Jun 157 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun7Good
Jul9Good
Aug34Moderate
Sep16Moderate
Oct14Moderate
Nov15Moderate
Dec12Good
Location & terrain

Where is Manteca?

Manteca sits at 37.8°N, 121.2°W, 36 ft above sea level, in United States. The nearest listed city is Lathrop, 3.7 mi away.

Topography around Manteca

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

Within 2 miles, the terrain around Manteca has only modest variations in elevation — a maximum elevation change of 59 ft around an average of 36 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 197 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,259 ft.

The land around Manteca is covered by artificial surfaces (67%) within 2 miles, cropland (35%) and trees (29%) within 10 miles, and grassland (44%) and trees (25%) within 50 miles.

2 miles
59 ft
10 miles
197 ft
50 miles
4,259 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Lathrop 3.7 mi · Ripon 6.2 mi · Stockton 12 mi · Tracy 12 mi · Riverbank 16 mi · Modesto 16 mi · Ceres 20 mi · Oakdale 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 Manteca (37.7974°, -121.216°, elevation 36 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).