Clinton (IA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Clinton.
Climate overview of Clinton
Clinton, Iowa, United States of America, sees big temperature differences between seasons, with July peaking at 29°C (84°F) and January dropping to -1°C (30°F).
With around 975 mm (38 in) of annual rain/snowfall, the city has moderate precipitation levels. June is the wettest month and January the driest. The sunniest month is July, with 10.1 hours of sunshine per day on average.
Clinton Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Clinton — and find the best time to visit.
Monthly Temperature in Clinton
Visitors to Clinton can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in July to a very cold -1°C (30°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 Clinton
Generally, Clinton experiences moderate precipitation patterns, averaging 975 mm (38 in) yearly. The climate in Clinton shows significant variation throughout the year. Expect high rainfall in June, the wettest month, with an average of 140 mm (5.5 in) of precipitation over 13 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 33 mm (1.3 in) of snowfall over 9 snowy days. For more details, please visit our Clinton 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 Clinton
For those who appreciate different seasons, Clinton serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.1 hours of sunshine daily, and embrace the darker days in December, offering only 3.8 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 Clinton by Month
The relative humidity is high throughout the year in Clinton.
The city experiences its highest humidity in December, reaching 73%. In April, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Clinton
The weather does bring rainfall during this period, between 75 mm (3 in) and 140 mm (5.5 in). Ready to plan your travels but need destination ideas? Our smart tool recommends places based on the climate conditions you prefer. Start planning with our destination weather tool.
Frequently asked questions about the climate in Clinton
What is the best time to visit Clinton?
September typically offers the most optimal weather in Clinton. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Clinton?
Daytime highs range from -1°C (30°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 Clinton get?
Annual rainfall is around 975 mm (38 in). June is the wettest month with 140 mm (5.5 in), while January is the driest with 33 mm (1.3 in).
How sunny is Clinton?
Clinton receives around 2,466 hours of sunshine per year. July is the sunniest month with 303 hours, while December is the cloudiest with just 115 hours. Overall, Clinton enjoys abundant sunshine.
Clinton 3-Day Forecast
Clinton (IA) 3-Day Forecast
Clinton on the map
Clinton is highlighted — select any city to see its climate.
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