Average Monthly Sunshine in O'Fallon (MO)
The graphs on this page shows the average number of hours per month and per day that O'Fallon receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.
Monthly hours of sunshine
Those who love seasonal contrasts will appreciate O'Fallon. Expect long, bright days with 311 hours in July and darker periods with just 128 hours in December. The total annual amount of sun is 2612 hours.
Daily hours of sunshine
Summer days are longer and more sunny, with daily sunshine hours peaking at 10.4 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 4.3 hours.
O'Fallon’s total hours of sunshine compared to other major cities
O'Fallon enjoys an average of 2612 hours of sunshine annually. Let’s compare this with some popular tourist destinations:
Athens, Greece, enjoys 2769 hours of sunshine each year, making it one of the sunniest destinations in the Mediterranean region.
In contrast, Dublin, Ireland, receives only about 1440 hours of sunshine per year, known for its frequently overcast and rainy skies.
In Shanghai, China, the annual average sunshine is 1780 hours, with cloudier weather in summer.
Perth, Australia, enjoys 3180 hours of sunshine annually, the highest among major Australian cities.
Other climate information
June, O'Fallon’s wettest month, receives 105 mm of rainfall and has a maximum daytime temperature of 30°C. During the driest month January you can expect a temperature of 5°C.
For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Precipitation page.
Forecast: is it sunny in O'Fallon (MO)?
clear and no rain
overcast and no rain
broken clouds and rain