Union City

Hawaii County, California, United States

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Current Weather

13°

Clear

Feels Like: 15°

Min: 12°

Max: 19°

The next few hours will be clear, with today reaching 19°C and dropping to 15°C. The coming days will be clear from afternoon until night.

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Hourly Forecast

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Daylight Hours

06:56

Sunrise

19:07

Sunset

12 hours 11 minutes of sunlight today

Moon

Waxing Crescent

12:45

Moonrise

21:27

Moonset

Daily Forecast

Today

12°
19°

Thursday

15°
21°

Friday

15°
23°

Saturday

15°
24°

Sunday

15°
22°

Monday

15°
23°

Tuesday

15°
26°

Wednesday

16°
26°

Thursday

13°
22°

Friday

14°
20°

Air Quality Data Available

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UV Index

No protection needed
0 Low
Low Extreme

Humidity

96% Very Humid
Low High

Weather in Union City today, September 16, 2026

Conditions in Union City on September 16, 2026 favour clear skies, so the day opens with a fine, sunny outlook. Any interruptions to the blue should be brief rather than lasting. Morning skies stay relatively clear, holding cloud close to 35% near 03:00. The early part of the day favours being outside.

The temperature range runs from about 12°C up to 19°C. Relative humidity sits between 71% and 98%, reaching its peak around 03:00. A lighter breeze peaks around 13:00 near 6.5 km/h.

The afternoon keeps an overcast feel, as cloud reaches about 69% around 22:00. Outdoor plans may still want a flexible backup. Expect visibility near 14.3 km, with poorer spells close to 11.1 km. The sun rises at 06:56 and sets at 19:07, for a total of 12 hours 11 minutes of sunlight today.

Taken together, settled sunshine in Union City on September 16, 2026 makes outdoor timing easier, with highs near 19°C.

Frequently asked questions about weather in Union City

How warm does it get in Union City?

The warmest month in Union City is August, with average high temperatures of 28°C. The average temperature during this period is around 21°C.

How cold does it get in Union City?

The coldest month in Union City is February, with average low temperatures of 7°C. The average temperature during this period is around 11°C.

What is the wettest time of year in Union City?

The wettest month in Union City is January, with an average of 106mm of precipitation.

What is the driest time of year in Union City?

The driest month in Union City is July, with an average of 0mm of precipitation.

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Metric (°C, km/h)