Temperatures in May
It's pleasantly warm in May in Decorah with an average temperature of 20°C. Temperatures this month range from a low of 14°C to a high of 26°C. At night, you can expect temperatures between 7°C and 15°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Decorah in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in Decorah with mild temperatures, averaging around 19°C during the day and nights close to 9°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-May
By mid-May, the average daytime temperature rises to around 20°C, with nights close to 10°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of May
By the end of May, the average daytime temperature in Decorah will be around 24°C, with nights close to 14°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Precipitation in May
In May, there is an average of 133 mm of precipitation, spread over 10 days. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 31% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for Decorah. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Decorah in May |
London | ||
|---|---|---|---|
 Average Temperature |
20°C | 18°C | |
 High Temp |
26°C | 21°C | |
| Low Temp |
14°C | 15°C | |
 Total Precipitation |
133 mm | 46 mm | |
| Rainy Days |
10 days | 8 days | |
April
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is May a good time to visit Decorah?
After some sun? Then May isn’t the best time to be in Decorah. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Decorah in May
With 34°C, Decorah hit the highest temperature in the last 10 years in May 2018. The lowest daytime temperature in this month was 6°C in 2017. The extreme night temperatures ranged from a low of -1°C to a high of 23°C.
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Daily Temperature in May in Decorah
This chart shows the average daily temperatures, both day and night, for each day in May in Decorah, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in Decorah
The chart below shows the average daily precipitation in May for Decorah, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 10 days of rain in Decorah.
Daily UV Index in May in Decorah
This chart shows the average daily UV index in May in Decorah, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Decorah Over the Years
This chart shows the average temperature in May in Decorah, measured in degrees Celsius, over the past years.
Total Precipitation in May in Decorah Over the Years
This chart shows the average precipitation in May in Decorah, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for Decorah
Click on a specific day in May for detailed info on the typical weather on that day in Decorah. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Decorah
Have you been to Decorah in May?
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Average Weather in Decorah by Month
Click on a month below to see detailed weather info for Decorah. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
