O'Fallon, Missouri, United States of America: What to pack, what to wear, and when to go [2018]

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

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.

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

January

January in O'Fallon is pretty cool. The average overnight temperatures in the area are in the low 20s F (single digits below 0 C).

What to wear/what to pack:

  • Cold weather footwear
  • Umbrella
  • Sweaters
  • Warm pants or jeans
  • Heavy socks
  • Waterproof boots
  • Gloves or mittens
  • Heavy jacket
  • Waterproof coat

February

If you go to O'Fallon in February, you will notice that it can be very chilly. Daytime temperatures are in the 40s F (single digits C).

What to wear/what to pack:

  • Heavy socks
  • Heavy jacket
  • Cold weather footwear
  • Umbrella
  • Gloves or mittens
  • Sweaters
  • Waterproof boots
  • Warm pants or jeans
  • Waterproof coat

March

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

What to wear/what to pack:

  • Socks
  • Waterproof coat
  • Waterproof boots
  • Standard footwear
  • Fleeces
  • Warm pants or jeans
  • Light gloves or mittens
  • Jacket or coat
  • Umbrella

April

If you are traveling to O'Fallon in April, you will notice that it is mild. Daytime temperatures are in the high 60s F (low 10s C).

What to wear/what to pack:

  • Umbrella
  • Rain coat
  • Long skirts
  • Socks
  • Waterproof footwear
  • Waterproof luggage
  • Pants or jeans
  • Dresses
  • Standard footwear
  • Long sleeve shirts or blouses
  • Light jacket or fleece

May

May in O'Fallon is warm. 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:

  • Skirts
  • Waterproof footwear
  • Waterproof luggage
  • Light footwear
  • Umbrella
  • Sunscreen lotion
  • Shorts or short pants
  • Long and short sleeve shirts
  • Dresses
  • Rain coat
  • Sandals

June

June for O'Fallon is hot. Temperatures average in the 80s F (high 20s C) during the day.

What to wear/what to pack:

  • Umbrella
  • Dresses
  • Shorts
  • Sunscreen lotion
  • Sunglasses
  • Waterproof footwear
  • Short sleeve shirts
  • Waterproof luggage
  • Skirts
  • Rain coat
  • Sandals

July

July in O'Fallon can be sweltering. The rain can amount to several inches/centimeters. During this time, temperatures average in the high 80s F (low 30s C), although night temperatures can dip into the low 60s F (mid 10s C).

What to wear/what to pack:

  • Shorts
  • Sandals
  • Sunglasses
  • Umbrella
  • Waterproof footwear
  • Short sleeve shirts
  • Skirts
  • Rain coat
  • Waterproof luggage
  • Sunscreen lotion
  • Dresses

August

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

What to wear/what to pack:

  • Shorts
  • Waterproof luggage
  • Short sleeve shirts
  • Umbrella
  • Waterproof footwear
  • Sandals
  • Sunglasses
  • Sunscreen lotion
  • Dresses
  • Skirts
  • Rain coat

September

September for O'Fallon is hot. Temperatures average in the low 80s F (high 20s C) during the day.

What to wear/what to pack:

  • Waterproof footwear
  • Long and short sleeve shirts
  • Rain coat
  • Sunscreen lotion
  • Light footwear
  • Sandals
  • Dresses
  • Umbrella
  • Skirts
  • Waterproof luggage
  • Shorts or short pants

October

October in this region is balmy. Temperatures average in the high 60s F (low 20s C) during the day.

What to wear/what to pack:

  • Rain coat
  • Umbrella
  • Waterproof luggage
  • Waterproof footwear
  • Pants or jeans
  • Dresses
  • Long sleeve shirts or blouses
  • Standard footwear
  • Long skirts
  • Socks
  • Light jacket or fleece

November

November for O'Fallon is chilly. Temperatures average in the 50s F (low 10s C) during the day.

What to wear/what to pack:

  • Waterproof coat
  • Jacket or coat
  • Umbrella
  • Standard footwear
  • Socks
  • Light gloves or mittens
  • Warm pants or jeans
  • Fleeces
  • Waterproof boots

December

December in O'Fallon can be very chilly. The rain/snow can amount to several inches/centimeters.

During this time, temperatures average in the low 30s F (single digits C) to low 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:

  • Cold weather footwear
  • Waterproof coat
  • Heavy jacket
  • Warm pants or jeans
  • Umbrella
  • Sweaters
  • Gloves or mittens
  • Waterproof boots
  • Heavy socks

Year-round what to wear/what to pack 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.

  • A plug adadpter that supports outlet types A and B
  • A SIM card that works in O'Fallon

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