Union City Weather in April

What's the weather like in Union City (California) in April 2026?

The climate in Union City during April can be summarized as mild and dry.

April is in the spring in Union City and is typically the 6th coldest month of the year. Daytime maximum temperatures average around 20°C (67°F), whilst at night 8°C (47°F) is normal.

Union City weather averages (imperial / metric)
Daytime temperature 19.5°C 67.1°F
Nightly temperature 8.3°C 46.9°F
Average temperature 13.9°C 57°F
Daily sunshine 11.2 hrs
Avg rainfall 29 mm 1.1 ins
Rainy days 6 days
Sea temperature 11.8°C 53.3°F
Humidity 69%
Windspeed 18kph 11 mph

On average April is the 6th wettest month of the year in Union City with around 29mm 1.1 inches of rain making it a dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 11.2 hours of sunshine per day.

April temperatures in Union City

Union City average temperature in April

April rainfall

Union City average rain in April

April hourly sunshine

Union City average rain in April

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 April 2025.

Other monthly averages

Best places to visit in April

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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