O'Fallon Weather in June
With daytime temperatures of 30°C (86°F) and nighttime lows of 19°C (66°F), June in O'Fallon brings very high temperatures during the day. It is also the wettest month of the year, so pack an umbrella.
Rainfall in O'Fallon in June
Being the wettest month, having an umbrella on standby can help you avoid getting caught in the rain. Historically, approximately 12 days this month are expected to have rain, averaging 142 mm (5.6 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in O'Fallon in June
June in O'Fallon brings typical temperatures with highs around 30°C (86°F) and lows of 19°C (66°F). It's usually most comfortable outside during the morning and later in the day. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in O'Fallon in June
Expect a lot of sunshine this month, with about 293 hours of sun. These sunny conditions add to the overall experience.If your ideal day consists of dry skies and pleasant temperatures, October typically offers the best circumstances for O'Fallon.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our O'Fallon's climate page.
O'Fallon Temperature in June
Min Temperature
19°C (66°F)
Max Temperature
30°C (86°F)
Chance of Rain
40%
Precipitation
142 mm (5.6 in)
Rainy days
12 days
Humidity
67% *
Sunshine
293 hours *
Percentage Sunshine
66% *
Best Places in the United States of America in June
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in June →
perfect weather
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unpleasant
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What to Wear in O'Fallon in June
Warm weather calls for comfortable, breathable clothing in June. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in O'Fallon in June
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our O'Fallon's climate page.
Temperature Rainfall Sunshine Humidity
See the full O'Fallon climate overview or explore weather in the United States of America.
