Alton weather in May (Illinois, United States of America)

Is May a good time to explore Alton weather-wise? Curious if the timing is right for your trip? Our page offers an in-depth look at the monthly weather conditions.

Temperatures

The typical weather for May in Alton includes high temperatures and high rainfall. Anticipate daytime temperatures around 24°C, while night temperatures can drop to 14°C.

Precipitation

Alton in May usually receives high rainfall, averaging around 107 mm for the month. Climate data suggests that about 13 days will experience rainfall.

Average sunshine

There are approximately 269 hours of sunshine this month, meaning plenty of sunny days and a vibrant atmosphere.

Should you favor a climate that's both dry and comfortably warm September and October typically offer the most agreeable circumstances. On the other hand, January, February and December tend to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized Alton climate page with graphs.

 

Alton, monthly averages in May

Min Temperature 14°C  

Max Temperature 24°C  

Chance of Rain 43%  

Precipitation 107 mm  

Rainy days 13 days  

Humidity 65% *  

Sunshine 269 hours *  

Percentage Sunshine 60% *  

* Data from: St. Louis, the United States of America (29 KM, 18 Miles).

Where to go in the United States of America in May

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Alton, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Alton.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.