Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Union (WI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Union.
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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, with warm summers and very cold winters. 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
The most comfortable overall weather for exploring Union is usually found in July and September. Conditions are generally least comfortable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
very cold
Mar
cold
Apr
mixed
May
very good
Jun
very good
Jul
excellent
Aug
very good
Sep
excellent
Oct
good
Nov
cold
Dec
very cold
- Best overall: July and September
- Warmest weather: July and August
- Fewest rainy days: January, February, March and November
- Seasonal pattern: A distinct dry season from January to February, with warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -15°C (5°F).
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, with warm summers and very cold winters.
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 on the map
Union is highlighted - select any city to see its climate.
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