Portage (WI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Portage.
Climate overview of Portage
Temperatures in Portage, Wisconsin, United States of America, vary greatly throughout the year. July is the hottest month at 28°C (82°F), while January is the coldest at -3°C (27°F).
With around 997 mm (39 in) of annual rain/snowfall, the city has moderate precipitation levels. June is the wettest month and January the driest. It also has a distinct dry season from January to February, with warm summers and very cold winters. July is the sunniest month, averaging 10.3 hours of sunshine per day.
Portage Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Portage - and find the best time to visit.
Monthly Temperature in Portage
The climate in Portage is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 28°C (82°F) in July to a very cold -3°C (27°F) in the coolest month, January.
Nights vary from 16°C (61°F) in July to around -13°C (9°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Portage
Generally, Portage receives mid-range precipitation levels, with 997 mm (39 in) annually. The climate in Portage shows significant variation throughout the year. Expect high rainfall in June, the wettest month, with an average of 158 mm (6.2 in) of precipitation over 12 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 30 mm (1.2 in) of snowfall over 8 snowy days. For more details, please visit our Portage Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Portage
For those who appreciate different seasons, Portage serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.3 hours of sunshine daily, and embrace the darker days in December, offering only 3.6 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Portage by Month
The relative humidity is high throughout the year in Portage.
The city experiences its highest humidity in December, reaching 77%. In May, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Portage
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July and September
- Warmest weather: July and August
- Most sunshine: June and July
- Fewer rainy days: January, February, March, October and November
- Wettest months: April, May, June, July, August and September, when rainfall is highest.
- Seasonal pattern: A distinct dry season from January to February, with warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -13°C (9°F).
Frequently asked questions about the climate in Portage
What is the best time to visit Portage?
July and September typically offer the most optimal weather in Portage. In contrast, January, February, March, November and December tend to have less optimal conditions. Portage has a distinct dry season from January to February, with warm summers and very cold winters.
What temperatures can I expect in Portage?
Daytime highs range from -3°C (27°F) in January to 28°C (82°F) in July. Nighttime lows range from -13°C (9°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Portage get?
Annual rainfall is around 997 mm (39 in). June is the wettest month with 158 mm (6.2 in), while January is the driest with 30 mm (1.2 in).
How sunny is Portage?
Portage receives around 2,454 hours of sunshine per year. July is the sunniest month with 308 hours, while December is the cloudiest with just 107 hours. Overall, Portage enjoys abundant sunshine.
Portage 3-Day Forecast
Portage on the map
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