Merrill (WI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Merrill.
Climate overview of Merrill
Temperatures in Merrill, Wisconsin, United States of America, vary greatly throughout the year. July is the hottest month at 27°C (81°F), while January is the coldest at -6°C (21°F).
With around 851 mm (34 in) of annual rain/snowfall, the city has moderate precipitation levels. June is the wettest month and February the driest. It also has a distinct dry season from January to February, with warm summers and very cold winters.
Merrill Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Merrill - and find the best time to visit.
Monthly Temperature in Merrill
The climate in Merrill is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 27°C (81°F) in July to a very cold -6°C (21°F) in the coolest month, January.
Nights vary from 14°C (57°F) in July to around -16°C (3°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Merrill
Generally, Merrill receives mid-range precipitation levels, with 851 mm (34 in) annually. The climate in Merrill shows significant variation throughout the year. Expect high rainfall in June, the wettest month, with an average of 122 mm (4.8 in) of precipitation over 15 rainy days.
In contrast, the driest month February offers drier and sunnier days, with around 20 mm (0.8 in) of snowfall over 7 snowy days. For more details, please visit our Merrill 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 Merrill
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: September
- Warmest weather: July and August
- Fewest rainy days: 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 -16°C (3°F).
Frequently asked questions about the climate in Merrill
What is the best time to visit Merrill?
September typically offers the most optimal weather in Merrill. In contrast, January, February, March, November and December tend to have less optimal conditions. Merrill has a distinct dry season from January to February, with warm summers and very cold winters.
What temperatures can I expect in Merrill?
Daytime highs range from -6°C (21°F) in January to 27°C (81°F) in July. Nighttime lows range from -16°C (3°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Merrill get?
Annual rainfall is around 851 mm (34 in). June is the wettest month with 122 mm (4.8 in), while February is the driest with 20 mm (0.8 in).
Merrill 3-Day Forecast
Merrill on the map
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