Benicia weather in August

In August, Benicia sees average daytime highs of 81°F and overnight lows near 56°F, with 0.0 in of rain across 0.2 wet days and about 13.5 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 81°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 Benicia's 2nd-clearest and 4th-windiest month. For the whole year in context, see Benicia's year-round climate.

Daytime high
81°
1st warmest
Overnight low
56°
12th coldest
Rainfall
0.0 in
0.2 wet days
Daylight
13 h 30 min
5:28 AM – 6:57 PM
Cloud cover
12%
2nd clearest
Wind
7 mph
4th windiest
Solar energy
7.12 kWh/m²
Travel score
8.9
out of 10

Benicia is city in Solano County, California, United States.

Density
692/km²
people per km²
Founded
1850

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 81°F through the month.

A typical August day in Benicia reaches about 81°F in the afternoon and slips back to 56°F overnight — a 25°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 91°F. Set against its neighbours, August runs on par with July and on par with September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18056
28056
38056
48156
58156
68156
78156
88156
98156
108156
118156
128156
138156
148156
158156
168156
178156
188156
198156
208156
218156
228156
238156
248156
258156
268156
278256
288256
298256
308256
318256

Benicia weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan57° / 42°4.09.39.74.2
Feb61° / 44°4.28.810.55.0
Mar64° / 46°3.18.711.76.1
Apr68° / 48°1.44.9137.3
May74° / 52°0.73148.4
Jun79° / 55°0.20.814.68.9
Jul80° / 56°0.00.114.49.0
Aug81° / 56°0.00.213.58.9
Sep81° / 55°0.10.412.38.8
Oct75° / 52°0.93118.5
Nov65° / 46°1.95.69.96.5
Dec57° / 42°3.79.39.44.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 90% of the time in August.

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

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1946
2946
3946
4946
5946
6946
7946
8946
9946
10946
11946
12946
13946
14946
15946
16946
17946
18955
19955
20955
21955
22955
23955
24955
25955
26964
27964
28964
29964
30964
31964

Chance of precipitation in August

Any precipitation

Benicia gets around 0.0 in of rain over 0.2 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 1% 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
141
151
161
171
181
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 71% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
174260
274260
373270
473270
572280
671290
771290
870300
970300
1070300
1170300
1270300
1370300
1469301
1569301
1669301
1770291
1870291
1970291
2071281
2171281
2271281
2371281
2472271
2572271
2672271
2773261
2873261
2974251
3075241
3176231

Wind in August

Winds average 7 mph in August.

Across August, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
296calm
306calm
316calm

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 5:15 AM to 5:42 AM, and sunset from 7:14 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:157:14
214.05:167:13
313.95:177:12
413.95:187:11
513.95:187:10
613.85:197:09
713.85:207:08
813.85:217:07
913.75:227:06
1013.75:237:05
1113.75:247:04
1213.65:257:02
1313.65:267:01
1413.65:267:00
1513.55:276:59
1613.55:286:57
1713.45:296:56
1813.45:306:55
1913.45:316:53
2013.35:326:52
2113.35:336:50
2213.35:346:49
2313.25:346:48
2413.25:356:46
2513.15:366:45
2613.15:376:43
2713.15:386:42
2813.05:396:40
2913.05:406:39
3012.95:416:37
3112.95:426:36

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 7.12 kWh/m².

For context, solar energy here swings from a low near 2.13 kWh/m² to a high of 7.96 kWh/m² in June across the year — August's 7.12 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.6Intense
27.5Intense
37.5Intense
47.5Intense
57.5Intense
67.4Intense
77.4Intense
87.4Intense
97.3Intense
107.3Intense
117.3Intense
127.3Intense
137.2Intense
147.2Intense
157.2Intense
167.1Intense
177.1Intense
187.1Intense
197.0Intense
207.0Intense
217.0Intense
226.9Intense
236.9Intense
246.9Intense
256.8Intense
266.8Intense
276.8Intense
286.7Intense
296.7Intense
306.7Intense
316.6Intense
Planning a trip in August

Hazard calendar for Benicia

In seasonPeak

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

Benicia'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 Benicia?

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

8.9
Sightseeing
2nd-best month of the year
9.0
Beach & pool
1st-best month of the year

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

What to pack for Benicia in August

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

In August, Benicia sees daytime highs around 81°F and nights near 56°F. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Benicia in August

The nearest coast averages about 58°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 28 mi away) is warmest in September at about 58°F and coldest in April near 53°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

52°54°56°58°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan53Bracing
Feb53Bracing
Mar54Bracing
Apr53Bracing
May53Bracing
Jun54Bracing
Jul56Bracing
Aug58Bracing
Sep58Bracing
Oct57Bracing
Nov55Bracing
Dec54Bracing

UV index in Benicia 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 Benicia peaks around June 23 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 23UV 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 Benicia 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 Benicia is worst in September — around 29 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (June, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateSep 1829 µg/m³Jun 127 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun7Good
Jul10Good
Aug25Moderate
Sep29Moderate
Oct27Moderate
Nov16Moderate
Dec12Good
Location & terrain

Where is Benicia?

Benicia sits at 38.0°N, 122.2°W, 26 ft above sea level, in United States. The nearest listed city is Martinez, 2.5 mi away.

Topography around Benicia

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

Within 2 miles, the terrain around Benicia has only modest variations in elevation — a maximum elevation change of 692 ft around an average of 115 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,473 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,459 ft.

The land around Benicia is covered by water (40%) and artificial surfaces (26%) within 2 miles, grassland (32%) and water (23%) within 10 miles, and grassland (29%), trees (23%) and water (21%) within 50 miles.

2 miles
692 ft
10 miles
1,473 ft
50 miles
4,459 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Martinez 2.5 mi · Vallejo 6.8 mi · Hercules 7.5 mi · Pinole 8.1 mi · Concord 8.7 mi · Pleasant Hill 8.7 mi · American Canyon 11 mi · Bay Point 11 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 Benicia (38.0494°, -122.1586°, elevation 26 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).