Johannesburg, California is a small and historic town located in Kern County. Situated in the southern part of the state, it experiences a semi-arid climate with hot summers and mild winters. Summers are typically dry, with average temperatures reaching the high 90s°F (around 37°C), while winters are cooler, with temperatures averaging in the 50s°F (around 10-15°C). The area receives minimal rainfall throughout the year.

Hydrologically, Johannesburg is surrounded by the Mojave Desert, making it a part of the arid Mojave River watershed. The region is characterized by limited water resources, with the majority of water supply coming from groundwater sources. The historical Randsburg Water Company provides water to the town.

Despite its arid environment, Johannesburg offers various outdoor recreational opportunities. The nearby Rand Mountains offer excellent hiking and off-roading trails, including the popular Last Chance Canyon. The area is also known for gold prospecting, with several mines and historic sites to explore. Outdoor enthusiasts can also visit Red Rock Canyon State Park, located just a short drive away, which features stunning rock formations, hiking trails, and camping opportunities. Overall, Johannesburg provides a unique blend of history, desert landscapes, and outdoor adventure for visitors and residents alike.