Union (WI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Union.
Climate overview of Union
Union, Wisconsin, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 28°C (82°F) in July, while winters cool to -5°C (23°F) in January.
The city receives around 855 mm (34 in) of rain/snowfall per year. It experiences a distinct dry season from January to February. June is the wettest month and January the driest.
Union Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Union — and find the best time to visit.
Monthly Temperature in Union
Depending on the time of the year, temperatures range from comfortable to very cold in Union. On average, daytime temperatures range from a comfortable 28°C (82°F) in July to a very cold -5°C (23°F) in January.
Nighttime temperatures range from 16°C (61°F) in July to -15°C (5°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Union
Generally, Union has a moderate amount of precipitation, averaging 855 mm (34 in) of rain/snowfall annually. The seasons in Union bring significant changes in precipitation. The wettest month, June, receives high rainfall, with an average of 125 mm (4.9 in) of precipitation. This rainfall is distributed across 13 rainy days.
In contrast, the driest month, January, experiences much less snowfall, totaling 21 mm (0.8 in) over 8 snowy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Union Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Union
Rainfall during this time ranges from 92 mm (3.6 in) in September to 125 mm (4.9 in) in June. This means you can expect a mix of sunny days and occasional showers. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
Frequently asked questions about the climate in Union
What is the best time to visit Union?
July and September typically offer the most optimal weather in Union. In contrast, January, February, March, November and December tend to have less optimal conditions. Union has a distinct dry season from January to February.
What temperatures can I expect in Union?
Daytime highs range from -5°C (23°F) in January to 28°C (82°F) in July. Nighttime lows range from -15°C (5°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Union get?
Annual rainfall is around 855 mm (34 in). June is the wettest month with 125 mm (4.9 in), while January is the driest with 21 mm (0.8 in).
Union 3-Day Forecast
Union (WI) 3-Day Forecast
Union on the map
Union is highlighted — select any city to see its climate.
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