Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
O'Fallon Weather in March
During March, O'Fallon experiences moderate daytime temperatures of 14°C (57°F) and cooler nights around 2°C (36°F). Expect quite a bit of rainfall. Around 81 mm (3.2 in) is typical.
Rainfall in O'Fallon in March
Expect around 12 days of rain based on historical data, with 81 mm (3.2 in) average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in O'Fallon in March
Temperatures in O'Fallon in March top out at 14°C (57°F) and drop to 2°C (36°F) overnight. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 2°C (36°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in O'Fallon in March
With approximately 199 hours of sunshine, the days are filled with clear skies. Despite it being a cool month, it makes for pleasant days outside.If your ideal day consists of dry skies and pleasant temperatures, October typically offers the best circumstances for O'Fallon.
O'Fallon Temperature in March
Min Temperature
2°C (36°F)
Max Temperature
14°C (57°F)
Chance of Rain
38%
Precipitation
81 mm (3.2 in)
Rainy days
12 days
Humidity
68% *
Sunshine
199 hours *
Percentage Sunshine
53% *
* Data from: St. Louis, the United States of America (48 KM, 29 Miles).
O'Fallon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in O'Fallon - and find the best time to visit.
Best Places in the United States of America in March
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 March →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in O'Fallon in March
Pack for changing conditions in O'Fallon in March. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. 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 March
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming5/10 -
Cycling6/10 -
Walking6/10 -
Camping4/10 -
Outdoor sports9/10
O'Fallon 3-Day Forecast
More climate data for O'Fallon
Temperature Rainfall Sunshine Humidity
See the full O'Fallon climate overview or explore weather in the United States of America.
Popular in March
Where to go in March - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.