Martinez weather in July

In July, Martinez sees average daytime highs of 80°F and overnight lows near 56°F, with 0.0 in of rain across 0.1 wet days and about 14.4 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 80°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 Martinez's 1st-clearest and 2nd-windiest month. For the whole year in context, see Martinez's year-round climate.

Daytime high
80°
3rd warmest
Overnight low
56°
11th coldest
Rainfall
0.0 in
0.1 wet days
Daylight
14 h 24 min
5:02 AM – 7:26 PM
Cloud cover
11%
1st clearest
Wind
8 mph
2nd windiest
Solar energy
7.91 kWh/m²
Travel score
9.0
out of 10

Martinez is city in and seat of Contra Costa County, California, United States.

Density
1,121/km²
people per km²
Founded
1849

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 80°F through the month.

A typical July day in Martinez reaches about 80°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 73°F and 89°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)
18055
28055
38155
48155
58155
68156
78156
88156
98156
108156
118156
128156
138056
148056
158056
168056
178056
188056
198056
208056
218056
228056
238056
248056
258056
268056
278056
288056
298056
308056
318056

Martinez weather by month

How July compares with the rest of the year at a glance. July is the 3rd-warmest and 12th-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 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 3% of July, with mostly cloudy or overcast conditions the remaining 6%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1928
2928
3937
4946
5946
6955
7955
8955
9955
10955
11955
12955
13955
14955
15955
16955
17955
18955
19955
20946
21946
22946
23946
24946
25946
26946
27946
28946
29946
30946
31946

Chance of precipitation in July

Any precipitation

Martinez gets around 0.0 in of rain over 0.1 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
50
60
70
80
90
100
110
120
130
140
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 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
184151
285150
385150
484160
584160
684160
783170
883170
982180
1082180
1181190
1280200
1380200
1479210
1578220
1677230
1777230
1876240
1976240
2076240
2176240
2276240
2376240
2476240
2576240
2676240
2776240
2876240
2975250
3075250
3175250

Wind in July

Winds average 8 mph in July.

Across July, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
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
207light breeze
217light breeze
227light breeze
237light breeze
247light breeze
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 4:54 AM to 5:14 AM, and sunset from 7:30 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.64:547:30
214.64:547:30
314.64:547:30
414.64:557:30
514.64:557:30
614.64:567:30
714.54:577:29
814.54:577:29
914.54:587:29
1014.54:587:29
1114.54:597:28
1214.55:007:28
1314.55:007:27
1414.45:017:27
1514.45:027:27
1614.45:027:26
1714.45:037:26
1814.45:047:25
1914.35:047:24
2014.35:057:24
2114.35:067:23
2214.35:077:23
2314.25:077:22
2414.25:087:21
2514.25:097:20
2614.25:107:20
2714.15:117:19
2814.15:127:18
2914.15:127:17
3014.05:137:16
3114.05:147:15

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 7.91 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 — July's 7.91 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.1Intense
28.1Intense
38.1Intense
48.1Intense
58.1Intense
68.1Intense
78.0Intense
88.0Intense
98.0Intense
108.0Intense
118.0Intense
128.0Intense
138.0Intense
147.9Intense
157.9Intense
167.9Intense
177.9Intense
187.8Intense
197.8Intense
207.8Intense
217.8Intense
227.8Intense
237.8Intense
247.7Intense
257.7Intense
267.7Intense
277.7Intense
287.7Intense
297.6Intense
307.6Intense
317.6Intense
Planning a trip in July

Hazard calendar for Martinez

In seasonPeak

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

Martinez'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 July a good time to visit Martinez?

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

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

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

What to pack for Martinez in July

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

In July, Martinez sees daytime highs around 80°F and nights near 56°F. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

Sea temperature near Martinez in July

The nearest coast averages about 56°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 29 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 Martinez 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 Martinez 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 Martinez 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 Martinez 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 Martinez?

Martinez sits at 38.0°N, 122.1°W, 23 ft above sea level, in United States. The nearest listed city is Benicia, 2.5 mi away.

Topography around Martinez

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

Within 2 miles, the terrain around Martinez has only modest variations in elevation — a maximum elevation change of 764 ft around an average of 144 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,470 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,262 ft.

The land around Martinez is covered by artificial surfaces (28%), water (27%) and grassland (21%) within 2 miles, grassland (31%), trees (23%) and artificial surfaces (21%) within 10 miles, and grassland (29%), trees (23%) and water (21%) within 50 miles.

2 miles
764 ft
10 miles
1,470 ft
50 miles
4,262 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: Benicia 2.5 mi · Concord 6.2 mi · Pleasant Hill 6.2 mi · Hercules 8.7 mi · Walnut Creek 8.7 mi · Vallejo 8.7 mi · Pinole 9.3 mi · Lafayette 9.3 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 Martinez (38.0194°, -122.1341°, elevation 23 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).