Rock City, CA
Unincorporated community in Contra Costa County, California
Rock City is a small unincorporated community in Contra Costa County, California. It is 1.4 miles SW of Diablo, the nearest town. Its ZIP code is 94528.
Rock City at a glance
- State
- California
- County
- Contra Costa County
- ZIP code
- 94528
- Nearest town
- Diablo (1.4 mi)
- Time zone
- America/Los Angeles
- Coordinates
- 37.8497, -121.9344
Weather in Rock City now
Loading the National Weather Service forecast…
Rock City weather by the hour
Rock City weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Rock City.
This week in Rock City
Sunrise, sunset and moon in Rock City
What is the weather usually like in Rock City?
Köppen climate classification, calculated from the 1991–2020 normals
- Augustwarmest month · 83°F average high
- Decembercoldest month · 41°F average low
- 26.1 inprecipitation per year · 662 mm
- 0.7 insnowfall per year · 2 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Rock City: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station MT DIABLO JUNCTION, CA US (USC00045915), adjusted for the elevation of Rock City.
Rock City weather month by month
Sunrise and sunset in Rock City through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:20 AM | 5:14 PM | 9 h 53 min |
| February | 6:55 AM | 5:48 PM | 10 h 52 min |
| March | 7:16 AM | 7:16 PM | 11 h 59 min |
| April | 6:30 AM | 7:44 PM | 13 h 14 min |
| May | 5:55 AM | 8:12 PM | 14 h 16 min |
| June | 5:43 AM | 8:33 PM | 14 h 49 min |
| July | 5:56 AM | 8:31 PM | 14 h 34 min |
| August | 6:22 AM | 8:02 PM | 13 h 40 min |
| September | 6:48 AM | 7:17 PM | 12 h 28 min |
| October | 7:15 AM | 6:31 PM | 11 h 16 min |
| November | 6:47 AM | 4:57 PM | 10 h 10 min |
| December | 7:14 AM | 4:51 PM | 9 h 36 min |
Times for the 15th of each month, local time (America/Los Angeles).
What is the weather like in Rock City?
Rock City has a hot-summer mediterranean climate. The warmest month is August, with an average high of 83°F (28°C), and the coldest is December, with average lows of 41°F (5°C).
It gets about 26.1 inches (662 mm) of precipitation a year. The wettest month is December and the driest is July.
The best time to visit Rock City is June to September. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
Webcams near Rock City
The closest live webcam is Clayton › North-east: Mount Diablo State Park - Mount Diablo - Mount Diablo Summit Museum and Trailhead, 2.4 miles NE of Rock City.
Webcams: Windy.com · Traffic cameras: Caltrans. Distances in a straight line from Rock City.
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Map of Rock City, CA
Tap any road on the map to see it in Street View below. Map: © OpenStreetMap contributors.
Rock City Street View
Drag the image to look around and tap the arrows on the ground to move. If it says there is no imagery, tap a nearby street on the map above.
Open in Google Maps ›Towns near Rock City
Other communities near Rock City
Questions about Rock City
Where is Rock City, CA?
Rock City is an unincorporated community in Contra Costa County, California, 1.4 miles SW of Diablo.
What county is Rock City in?
Rock City is in Contra Costa County, California.
What is the ZIP code of Rock City, CA?
The ZIP code for Rock City is 94528.
What is the nearest town to Rock City?
Diablo, 1.4 miles away.
Are there webcams near Rock City?
Yes. The closest is Clayton › North-east: Mount Diablo State Park - Mount Diablo - Mount Diablo Summit Museum and Trailhead, 2.4 miles away.
What is the hottest month in Rock City?
August, with an average high of 83°F (28°C).
What is the coldest month in Rock City?
December, with an average low of 41°F (5°C).
How much does it rain in Rock City?
About 26.1 inches (662 mm) a year; the wettest month is December.
Does it snow in Rock City?
Rarely: less than an inch in an average year.
When is the best time to visit Rock City?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Rock City have?
Hot-summer mediterranean (Köppen Csa).
Last updated: