Union City (CA) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Union City

Union City average temperature chart (Celsius) Union City average temperature chart (Fahrenheit)
Average monthly temperatures in Union City (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 13.6 16 17.1 19.2 21.6 24.1 25.4 25.5 25.4 22.8 17.6 13.7
°F 56.5 60.8 62.8 66.6 70.8 75.4 77.8 78 77.7 73 63.7 56.6

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Union City monthly rainfall chart (mm) Union City monthly rainfall chart (inches)
Average monthly rainfall in Union City (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 80 60 59 29 7 2 1 1 4 22 53 60
inches 3.1 2.4 2.3 1.1 0.3 0.1 0 0.1 0.2 0.9 2.1 2.4
Rainy days 10 9 10 6 2 1 0 1 1 4 8 9

Average annual rainfall in Union City: 293.7mm (115.6 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Union City

Union City average daily sunshine chart
Average daily sunshine Union City
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.2 8 9.4 11.2 11.9 12 11.9 10.9 10.4 9.1 6.6 5.6

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Union City average minimum / maximum temperatures (Celsius) Union City average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Union City (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 4.8 6.8 7.5 8.3 10.2 12 12.9 13.2 12.9 10.8 7.8 5.1
Max °C 13.8 16.3 17.4 19.5 21.9 24.4 25.8 25.9 25.7 23.1 17.9 13.9
Min °F 40.6 44.2 45.4 46.9 50.3 53.6 55.1 55.7 55.2 51.4 46 41.2
Max °F 48.7 52.7 54.3 57 60.8 64.8 66.7 67.1 66.7 62.4 55 49.1

Sea temperature

The graph below shows the average sea temperature.

Union City average sea temperature chart (Celsius) Union City average sea temperature chart (Fahrenheit)
Average sea temperature around Union City in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.4 12.2 12.2 11.8 11.8 12.2 13.1 14 14.4 14.2 13.6 12.7
°F 54.2 54 53.9 53.3 53.2 53.9 55.5 57.2 57.9 57.6 56.4 54.9

Wind speed

The graph below shows the average wind speed.

Union City average winspeed by month (km/h) Union City average winspeed by month (mph)
Average wind speed in Union City (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 12 14 17 18 20 20 19 18 16 14 13 12
mph 8 9 10 11 12 13 12 11 10 9 8 8

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Union City relative humidity averages
Average relative humidity in Union City
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
80% 77% 73% 69% 67% 66% 66% 68% 67% 69% 76% 80%

Other monthly averages

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
Warmest sea: September 14.4°C 57.9°F
Map showing location of Union City (37.59583, -122.01917) Union City map pin © Google

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