Jefferson Weather in May

What's the weather like in Jefferson (Iowa) in May 2025?

The climate in Jefferson during May can be summarized as mild and damp.

May is in the spring in Jefferson and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 23°C (73°F), whilst at night 10°C (49°F) is normal.

Jefferson weather averages (imperial / metric)
Daytime temperature 23°C 73.3°F
Nightly temperature 9.7°C 49.4°F
Average temperature 16.3°C 61.3°F
Daily sunshine 9.5 hrs
Avg rainfall 104 mm 4.1 ins
Rainy days 12 days
Sea temperature 11.6°C 52.9°F
Humidity 63%
Windspeed 19.1kph 12 mph

On average May is the 4th wettest month of the year in Jefferson with around 104mm 4.1 inches of rain making it a damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.5 hours of sunshine per day.

May temperatures in Jefferson

Jefferson average temperature in May

May rainfall

Jefferson average rain in May

May hourly sunshine

Jefferson average rain in May

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Jefferson in May 2025.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Jefferson weather stats

Jefferson weather statistics
Hottest month: July 29.8°C 85.6°F
Driest month: January 20mm 0.8ins
Sunniest month: July 11.6hrs
Coldest month: January -2.9°C 26.8°F
Wettest month: June 120mm 4.7ins
Map showing location of Jefferson (42.01526, -94.37747) Jefferson map pin © Google

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