Union City Weather in July

What's the weather like in Union City (California) in July 2025?

The climate in Union City during July can be summarized as warm and very dry.

July is in the summer in Union City and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 13°C (55°F) is normal.

Union City weather averages (imperial / metric)
Daytime temperature 25.8°C 78.4°F
Nightly temperature 12.9°C 55.1°F
Average temperature 19.3°C 66.7°F
Daily sunshine 11.9 hrs
Avg rainfall 1 mm 0 ins
Rainy days 0 days
Sea temperature 13.1°C 55.5°F
Humidity 66%
Windspeed 19.1kph 12 mph

On average July is the driest month of the year in Union City with around 1mm 0 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 11.9 hours of sunshine per day.

July temperatures in Union City

Union City average temperature in July

July rainfall

Union City average rain in July

July hourly sunshine

Union City average rain in July

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Union City in July 2025.

Other monthly averages

Best places to visit in July

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Union City weather stats

Union City weather statistics
Hottest month: August 25.5°C 77.9°F
Driest month: July 1mm 0ins
Sunniest month: April 11.2hrs
Coldest month: January 13.6°C 56.5°F
Wettest month: January 80mm 3.1ins
Map showing location of Union City (37.59583, -122.01917) Union City map pin © Google

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