Newton (IA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Newton.
Climate overview of Newton
Temperatures in Newton, Iowa, United States of America, vary greatly throughout the year. July is the hottest month at 29°C (84°F), while January is the coldest at -2°C (28°F).
With around 967 mm (38 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. July is the sunniest month, averaging 11.2 hours of sunshine per day.
Newton Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Newton — and find the best time to visit.
Monthly Temperature in Newton
The climate in Newton is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in July to a very cold -2°C (28°F) in the coolest month, January.
Nights vary from 18°C (64°F) in July to around -11°C (12°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Newton
Generally, Newton receives mid-range precipitation levels, with 967 mm (38 in) annually. The climate in Newton shows significant variation throughout the year. Expect high rainfall in June, the wettest month, with an average of 147 mm (5.8 in) of precipitation over 12 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 18 mm (0.7 in) of snowfall over 6 snowy days. For more details, please visit our Newton 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 Newton
For those who appreciate different seasons, Newton serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.2 hours of sunshine daily, and embrace the darker days in December, offering only 4.3 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 Newton by Month
The relative humidity is high throughout the year in Newton.
The city experiences its highest humidity in January, reaching 72%. In May, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Newton
Frequently asked questions about the climate in Newton
What is the best time to visit Newton?
September typically offers the most optimal weather in Newton. In contrast, January, February, March, November and December tend to have less optimal conditions. Newton has a distinct dry season from January to February.
What temperatures can I expect in Newton?
Daytime highs range from -2°C (28°F) in January to 29°C (84°F) in July. Nighttime lows range from -11°C (12°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Newton get?
Annual rainfall is around 967 mm (38 in). June is the wettest month with 147 mm (5.8 in), while January is the driest with 18 mm (0.7 in).
How sunny is Newton?
Newton receives around 2,700 hours of sunshine per year. July is the sunniest month with 335 hours, while December is the cloudiest with just 129 hours. Overall, Newton enjoys abundant sunshine.
Newton 3-Day Forecast
Newton (IA) 3-Day Forecast
Newton on the map
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