Watertown (WI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Watertown.
Climate overview of Watertown
The climate in Watertown, Wisconsin, United States of America, is marked by large temperature swings across the seasons, ranging from 28°C (82°F) in July to -3°C (27°F) in January.
With around 983 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. Sunshine peaks in July, when the city sees around 10.3 hours of sunshine per day.
Watertown Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Watertown - and find the best time to visit.
Monthly Temperature in Watertown
In Watertown, temperatures differ significantly between summer and winter months. 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 -12°C (10°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Watertown
On average, Watertown receives a reasonable amount of rain/snowfall, with an annual precipitation of 983 mm (39 in). The climate in Watertown shows significant variation throughout the year. Expect high rainfall in June, the wettest month, with an average of 150 mm (5.9 in) of precipitation over 13 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 35 mm (1.4 in) of snowfall over 9 snowy days. For more details, please visit our Watertown 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 Watertown
For those who appreciate different seasons, Watertown 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 Watertown by Month
The relative humidity is high throughout the year in Watertown.
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 Watertown
Each month is rated for comfortable sightseeing weather — mild temperatures and low rainfall. Tap a month for its full averages; your ideal time may differ for a beach or winter trip (see below).
- Best overall: May, August and September
- Warmest weather: July and August
- Most sunshine: June and July
- Fewest rainy days: January, February, March and November
- Wettest period: April, May, June, July, August and September, when rainfall peaks.
- Climate seasons: a distinct dry season from January to February, with warm summers and very cold winters
- Best for winter weather: January, with freezing nights around -12°C (10°F).
Frequently asked questions about the climate in Watertown
What is the best time to visit Watertown?
May, August and September typically offer the most optimal weather in Watertown. In contrast, January, February, March, November and December tend to have less optimal conditions. Watertown has a distinct dry season from January to February, with warm summers and very cold winters.
What temperatures can I expect in Watertown?
Daytime highs range from -3°C (27°F) in January to 28°C (82°F) in July. Nighttime lows range from -12°C (10°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Watertown get?
Annual rainfall is around 983 mm (39 in). June is the wettest month with 150 mm (5.9 in), while January is the driest with 35 mm (1.4 in).
How sunny is Watertown?
Watertown 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, Watertown enjoys abundant sunshine.
Watertown 3-Day Forecast
Watertown (WI) 3-Day Forecast
Watertown on the map
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