O'Fallon, Missouri, United States of America: What to pack, what to wear, and when to go [2022]

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Traveling to O'Fallon, Missouri, United States of America? If you're planning to go to O'Fallon, the following is some important information about when to go, what to wear, and what to pack.

Contents

About your travel guide

Hi! I'm Dev. I've traveled all over the world and in my travels, I have made many packing lists. In this series, my team and I have compiled the most useful information, as well as things we couldn't live without, to help you plan your trip.


When to go to O'Fallon, Missouri, United States of America

Based on the climate and weather in O'Fallon, the best time to go is September. See below for details.

Important essentials for O'Fallon, Missouri, United States of America

Here are some general tips on what to wear in O'Fallon, as well as several items to remember to pack when traveling there.

IMPORTANT COVID-19 ESSENTIALS

Other health necessities


  • Travel first aid kit

    This one is a superb choice.


  • Emergency rapid COVID-19 test

    U.S. residents can get them free here. Otherwise, you can buy them here.


  • Emergency motion sickness relief

Don't forget these

Activities for O'Fallon, Missouri, United States of America

Here are some activity recommendations and activity-specific packing tips for O'Fallon.

We also recommend these top tours in and around O'Fallon.

What to wear/what to pack for O'Fallon, Missouri, United States of America by month

Already know when you're traveling?

January

January in O'Fallon is cold. Temperatures average in the high 30s F (single digits C) during the day.

What to wear/what to pack:

February

February in O'Fallon can be very chilly. The rain/snow can amount to several inches/centimeters. During this time, temperatures average in the 30s F (single digits C) to 40s F (single digits C), although night temperatures can dip into the low 20s F (single digits below 0 C).

What to wear/what to pack:

March

In March, O'Fallon is chilly. Temperatures routinely are in the 50s F (low 10s C) and regularly jump into the low 60s F (mid 10s C) range. At night, lows are in the low 30s F (single digits C). This is also a rainy time for O'Fallon, with several of the days of the month having rain.

What to wear/what to pack:

April

April in O'Fallon is mild. The rain can amount to several inches/centimeters. During this time, temperatures average in the high 60s F (low 10s C), although night temperatures can dip into the low 40s F (single digits C).

What to wear/what to pack:

May

May in O'Fallon is a perfect temperature. The rain can amount to several inches/centimeters. During this time, temperatures average in the 60s F (high 10s C) to 70s F (mid 20s C), although night temperatures can dip into the low 50s F (single digits C).

What to wear/what to pack:

June

If you visit O'Fallon during June, you may find that it is extremely warm. Temperatures tend to hover around the 80s F (high 20s C) during the day, while at night they can dip into the low 60s F (high 10s C).

What to wear/what to pack:

July

If you vacation in O'Fallon during July, you might notice that it can be sweltering. Temperatures tend to hover around the high 80s F (low 30s C) during the day, while at night they can dip into the high 60s F (low 10s C).

What to wear/what to pack:

August

August in O'Fallon is really hot. Temperatures average in the high 80s F (low 30s C) during the day.

What to wear/what to pack:

September

September here is extremely warm. Temperatures average in the low 80s F (high 20s C) during the day.

What to wear/what to pack:

October

October in O'Fallon is mild. The average overnight temperatures in the area are in the 40s F (single digits C), with a few days below 32 F (single digits C).

What to wear/what to pack:

November

November in O'Fallon is chilly. The average overnight temperatures in the area are in the 30s F (single digits C).

What to wear/what to pack:

December

December in O'Fallon can be brisk. The average overnight temperatures in the area are in the 20s F (single digits below 0 C).

What to wear/what to pack:

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