Antioch in Summer

In summer (June, July and August), Antioch sees average daytime highs around 83°F and overnight lows near 59°F, with 0.2 in of rain over about 1 wet days across the season. It is the warmest season of the year and the driest season of the year.

Over the season highs climb from about 79°F in early June to 84°F by late August. The sky is clear or mostly clear about 87% of the time across summer, and the air most often feels dry.

Summer is Antioch's best season of the year to visit on our travel score. For the whole year in context, see Antioch's year-round climate.

Avg daytime high: 83°F; warmest season of the year
Avg overnight low: 59°F
Rainfall: 0.2 in; 1 wet days
Avg wind: 8 mph
Travel score: 7.9; best season of the year
Months: Jun · Jul · Aug

← Spring Antioch year-round climate Fall →

Spring Summer Fall Winter

Temperature in Antioch in Summer

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 79°F in early June to 84°F by late August.

A typical summer day in Antioch reaches about 83°F and drops to 59°F overnight. The warmest of the three months is July, the coolest June.

Antioch weather by month

How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	57° / 43°	3.7	9	9.7	4.2
Feb	61° / 45°	3.5	8.8	10.5	5.2
Mar	66° / 48°	2.7	8.3	11.7	6.4
Apr	70° / 50°	1.2	4.7	13	7.6
May	76° / 54°	0.6	3	14	8.5
Jun	82° / 57°	0.1	0.7	14.6	8.3
Jul	84° / 59°	0.0	0.2	14.4	7.7
Aug	84° / 59°	0.1	0.2	13.5	7.7
Sep	82° / 58°	0.0	0.3	12.3	8.3
Oct	76° / 54°	0.9	2.8	11	8.6
Nov	65° / 47°	1.8	5.4	9.9	6.6
Dec	57° / 43°	3.4	8.4	9.4	4.3

Cloud cover in Summer

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 87% of the time across summer.

Chance of precipitation in Summer

Any precipitation

Antioch gets around 0.2 in of rain over 1 wet days across summer. The line is the day-by-day chance of measurable precipitation.

Humidity in Summer

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Summer

Winds average 8 mph across summer.

Sunrise & sunset in Summer

DaylightNight

Daylight runs from about 14 h 24 min in early June to 12 h 54 min by late August. The lit band spans sunrise to sunset each day.

Solar energy in Summer

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across summer, about 7.9 kWh/m².

Planning a trip in summer

Is summer a good time to visit Antioch?

Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

7.9

Sightseeing

1st-best month of the year

9.3

Beach & pool

1st-best month of the year

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

What to pack for Antioch in Summer

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

In summer, Antioch sees daytime highs around 83°F and nights near 59°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Antioch in Summer

LowModerateHighVery highExtreme

Clear-sky midday UV across summer averages 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 Antioch 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	4	4	6	8	10	10	10	6	5	2	2
Level	Moderate	Moderate	Moderate	High	Very high	Very high	Very high	Very high	High	High	Moderate	Low

	UV index (midday)	Level
Jan	2	Moderate
Feb	4	Moderate
Mar	4	Moderate
Apr	6	High
May	8	Very high
Jun	10	Very high
Jul	10	Very high
Aug	10	Very high
Sep	6	High
Oct	5	High
Nov	2	Moderate
Dec	2	Low

Air quality in Antioch in Summer

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Antioch 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	15	14	15	12	9	8	11	27	23	17	19	14
Level	Moderate	Moderate	Moderate	Good	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	15	Moderate
Feb	14	Moderate
Mar	15	Moderate
Apr	12	Good
May	9	Good
Jun	8	Good
Jul	11	Good
Aug	27	Moderate
Sep	23	Moderate
Oct	17	Moderate
Nov	19	Moderate
Dec	14	Moderate

Location & terrain

Where is Antioch?

Antioch sits at 38.0°N, 121.8°W, 43 ft above sea level, in United States. The nearest listed city is Pittsburg, 4.3 mi away.

Topography around Antioch

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

Within 2 miles, the terrain around Antioch has only modest variations in elevation — a maximum elevation change of 253 ft around an average of 59 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,501 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,452 ft.

The land around Antioch is covered by artificial surfaces (54%) within 2 miles, grassland (43%) within 10 miles, and grassland (33%) and trees (23%) within 50 miles.

2 miles

253 ft

artificial surfaces 54%

10 miles

3,501 ft

grassland 43%

50 miles

4,452 ft

grassland 33%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← Spring Antioch year-round climate Fall →

Summer weather nearby: Pittsburg 4.3 mi · Oakley 5.0 mi · Brentwood 8.1 mi · Bay Point 8.7 mi · Concord 12 mi · Pleasant Hill 14 mi · Walnut Creek 16 mi · Danville 17 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

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 Antioch (38.0049°, -121.8058°, elevation 43 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.