Union Weather in September

In Union, September brings high daytime temperatures around 23°C (73°F), with nights cooling to 10°C (50°F). Expect quite a bit of rainfall this month.

Rainfall in Union in September

The climate data from previous years indicates about 11 days of rain, averaging 92 mm (3.6 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Union in September

Union has perfect weather in September, with days reaching 23°C (73°F) and nights cooling to 10°C (50°F). Overall, the month follows a fairly predictable daily temperature pattern. With lows of 10°C (50°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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• January
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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's climate page.

Union Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 23°C (73°F)  

Chance of Rain 37%  

Precipitation 92 mm (3.6 in)  

Rainy days 11 days  

What to Wear in Union in September

For Union in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.

What To Do in Union in September

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

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

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's climate page.

More climate data for Union

Temperature Rainfall

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