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O'Fallon weather in July (Missouri, United States of America)

What kind of weather does July bring to O'Fallon? Discover if this is the best time for your journey with our detailed monthly weather breakdown.

Temperatures

During July, O'Fallon usually has very high temperatures and high rainfall. The month of July belongs to the summer season. Throughout the daytime, temperatures often hover around 31°C. However, as the sun sets and evening approaches, there's a noticeable cool-down. Temperatures gently drop to a more temperate 20°C. This period is characterized by high temperatures, often making it the hottest month of the year. Dressing in light, airy clothing will help you stay cool and comfortable.

Precipitation

O'Fallon in July usually receives high rainfall, averaging around 105 mm for the month. Looking at the last 30 years, the data shows about 10 days with rain.

Average sunshine

With around 311 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

If your ideal day consists of dry skies and moderate temperatures October generally stands out with the best circumstances. While January, February and December tend to showcase less optimal conditions.

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

 

O'Fallon, monthly averages in July

Min TemperatureMin Temperature 20°C  
Max TemperatureMax Temperature 31°C  
Chance of RainChance of Rain 33%  
PrecipitationPrecipitation 105 mm  
Rainy daysRainy days 10 days  
HumidityHumidity 68% *  
SunshineSunshine 311 hours *  
Percentage SunshinePercentage Sunshine 68% *  
Data from: St. Louis, the United States of America (48 KM, 29 Miles).

Where to go in the United States of America in July

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

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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?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case.

What To Do

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

Swimming
9/10
Cycling
7/10
Walking
7/10
Camping
6/10
Outdoor sports
7/10

Interested in more climate information?

This site provides you with all the information you need about the climate in O'Fallon.

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.