Decorah (IA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Decorah.
Climate overview of Decorah
Decorah, Iowa, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 28°C (82°F) in July, while winters cool to -3°C (27°F) in January.
The city receives around 984 mm (39 in) of rain/snowfall per year. It experiences a distinct dry season from January to February. June is the wettest month and January the driest.
Decorah Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Decorah — and find the best time to visit.
Monthly Temperature in Decorah
Depending on the time of the year, temperatures range from comfortable to very cold in Decorah. On average, daytime temperatures range from a comfortable 28°C (82°F) in July to a very cold -3°C (27°F) in January.
Nighttime temperatures range from 16°C (61°F) in July to -13°C (9°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Decorah
Generally, Decorah has a moderate amount of precipitation, averaging 984 mm (39 in) of rain/snowfall annually. The seasons in Decorah bring significant changes in precipitation. The wettest month, June, receives heavy rainfall, with an average of 167 mm (6.6 in) of precipitation. This rainfall is distributed across 12 rainy days.
In contrast, the driest month, January, experiences much less snowfall, totaling 20 mm (0.8 in) over 6 snowy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Decorah Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Humidity in Decorah by Month
The relative humidity is high throughout the year in Decorah.
The city experiences its highest humidity in September, reaching 76%. In April, the humidity drops to its lowest level at 63%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Decorah
Rainfall during this time ranges from 91 mm (3.6 in) in September to 136 mm (5.4 in) in August. This means you can expect a mix of sunny days and occasional showers.
The rainy season falls during June, bringing heavy precipitation. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
Frequently asked questions about the climate in Decorah
What is the best time to visit Decorah?
July and September typically offer the most optimal weather in Decorah. In contrast, January, February, March, November and December tend to have less optimal conditions. Decorah has a distinct dry season from January to February.
What temperatures can I expect in Decorah?
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 Decorah get?
Annual rainfall is around 984 mm (39 in). June is the wettest month with 167 mm (6.6 in), while January is the driest with 20 mm (0.8 in).
Decorah 3-Day Forecast
Decorah (IA) 3-Day Forecast
Decorah on the map
Decorah is highlighted — select any city to see its climate.
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