Union City Weather in September

Union City in September averages 25°C (77°F) during the day and 14°C (57°F) at night. This is part of the summer season. Minimal rainfall is to be expected.

Rainfall in Union City in September

The climate data from previous years indicates about a single day of rain, averaging 3.4 mm (0.1 in) for the month. On the rare occasion it rains this month, it usually amounts to very little.

Temperature in Union City in September

September in Union City is generally excellent, with days reaching 25°C (77°F) and nights settling around 14°C (57°F). September is part of the summer season. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 14°C (57°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep. This month tends to be the warmest of the year. Light, comfortable clothing will serve you well.

Sunshine in Union City in September

The month enjoys around 270 hours of sunshine, creating mostly sunny days with good weather conditions.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Union City.

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• January
• February
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• May
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• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Union City's climate page.

Union City Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 3%  

Precipitation 3.4 mm (0.1 in)  

Rainy days a single day  

Humidity 73% *  

Sunshine 270 hours *  

Percentage Sunshine 73% *  

* Data from: San Francisco, the United States of America (26 KM, 16 Miles).

What to Wear in Union City in September

Warm but pleasant conditions in Union City in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Dry conditions mean you won't need to worry about rain protection. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Union City in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Union City's climate page.

More climate data for Union City

Temperature Rainfall Sunshine Humidity

See the full Union City climate overview or explore weather in the United States of America.