Cornwall, Ontario, Canada: What to pack, what to wear, and when to go [2018]

Traveling to Cornwall, Ontario, Canada? If you're planning to go to Cornwall, here is some important information about when to go, what to wear, and what to pack:

When to go to Cornwall, Ontario, Canada

Based on the climate and weather in Cornwall, the best time to go is July. See below for details.

What to wear/what to pack for Cornwall, Ontario, Canada by month

January

If you go to Cornwall in January, you will notice that it is unbearably cold and somewhat snowy. Expect it to rain once in a while and snow a bit less than half of the time.

Daytime temperatures are in the low 20s F (single digits below 0 C).

What to wear/what to pack:

  • Extreme cold weather gear
  • Waterproof boots
  • High performance gloves
  • Insulated boots
  • Thermal undergarments
  • Waterproof coat
  • Umbrella
  • Thick pajamas
  • Fleece for under jacket
  • Goggles for eye protection
  • Neck gaiter
  • Multiple layer jacket shell
  • Coveralls

February

In February, Cornwall can be dangerously cold. Temperatures routinely are in the high 20s F (single digits below 0 C) and about a third of the time jump into the low 30s F (single digits C) range.

At night, lows are in the single digits F (10+ below zero C). This is also a rainy time for Cornwall, with a few of the days of the month having rain.

What to wear/what to pack:

  • Neck gaiter
  • Insulated boots
  • Thick pajamas
  • High performance gloves
  • Coveralls
  • Waterproof coat
  • Goggles for eye protection
  • Waterproof boots
  • Umbrella
  • Fleece for under jacket
  • Thermal undergarments
  • Multiple layer jacket shell
  • Extreme cold weather gear

March

March in Cornwall can be very chilly. The average overnight temperatures in the area are in the low 10s F (single digits below 0 C), with a few days below -4 F (20+ below zero C).

It tends to rain regularly. It also snows occasionally.

What to wear/what to pack:

  • Insulated boots
  • Waterproof coat
  • Very heavy socks
  • Thermal undergarments
  • Multiple layer jacket shell
  • Gloves
  • Sweaters
  • Scarf
  • Fleeces
  • Umbrella
  • Pajamas, such as sweats
  • Waterproof boots

April

If you go to Cornwall in April, you will notice that it is cold and somewhat rainy. Expect it to rain about half of the time. Daytime temperatures are in the 50s F (low 10s C).

What to wear/what to pack:

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

May

If you visit Cornwall during May, you are likely to find that it is mild and somewhat rainy. Temperatures tend to hover around the high 60s F (high 10s C) during the day, while at night they can dip into the 40s F (single digits C).

In terms of precipitation, you can expect it to rain about half of the time.

What to wear/what to pack:

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

June

In June, Cornwall is a perfect temperature and somewhat rainy. Temperatures routinely are in the 70s F (mid 20s C) range.

At night, lows are in the 50s F (low 10s C). This is also a rainy time for Cornwall, with several of the days of the month having rain.

What to wear/what to pack:

  • Sunscreen lotion
  • If you're going to the beach, bathing suits, swimwear
  • Skirts
  • Waterproof luggage
  • Rain coat
  • Light footwear
  • Sandals
  • Waterproof footwear
  • Umbrella
  • Shorts or short pants
  • Long and short sleeve shirts
  • Dresses

July

July in Cornwall is extremely warm and somewhat rainy. The rain can amount to several inches/centimeters. During this time, temperatures average in the low 70s F (low 20s C) to low 80s F (high 20s C).

What to wear/what to pack:

  • Waterproof luggage
  • Rain coat
  • If you're going to the beach, bathing suits, swimwear
  • Dresses
  • Umbrella
  • Sunscreen lotion
  • Sandals
  • Long and short sleeve shirts
  • Shorts or short pants
  • Waterproof footwear
  • Light footwear
  • Skirts

August

In August, Cornwall is warm and somewhat rainy. Temperatures routinely are in the high 70s F (mid 20s C) range.

At night, lows are in the high 50s F (mid 10s C). This is also a rainy time for Cornwall, with several of the days of the month having rain.

What to wear/what to pack:

  • Sunscreen lotion
  • Dresses
  • Umbrella
  • Long and short sleeve shirts
  • Waterproof luggage
  • Light footwear
  • Shorts or short pants
  • If you're going to the beach, bathing suits, swimwear
  • Skirts
  • Rain coat
  • Waterproof footwear
  • Sandals

September

September in Cornwall is mild and somewhat rainy. The rain can amount to several inches/centimeters.

During this time, temperatures average in the low 50s F (mid 10s C) to high 60s F (low 20s C), although night temperatures can dip into the 30s F (single digits C).

What to wear/what to pack:

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

October

October in Cornwall is crisp and somewhat rainy. The average overnight temperatures in the area are in the low 30s F (single digits C), with a few days below 28 F (single digits below 0 C).

It tends to rain about half of the time.

What to wear/what to pack:

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

November

If you are traveling to Cornwall in November, you will notice that it can be very chilly and somewhat rainy. Expect it to rain about half of the time and snow sometimes.

Daytime temperatures are in the low 40s F (single digits C).

What to wear/what to pack:

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

December

If you go to Cornwall in December, you will notice that it is very cold. Expect it to rain occasionally and snow about a third of the time. Daytime temperatures are in the high 20s F (single digits below 0 C).

What to wear/what to pack:

  • Insulated boots
  • Sweaters
  • Gloves
  • Thermal undergarments
  • Scarf
  • Fleeces
  • Multiple layer jacket shell
  • Waterproof coat
  • Waterproof boots
  • Umbrella
  • Pajamas, such as sweats
  • Very heavy socks

Year-round what to wear/what to pack for Cornwall, Ontario, Canada

Here are some general tips on what to wear in Cornwall, 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 Cornwall
  • Appropriate museum wear

Check out our guides for these other locations: Atlantic Coast, Uruguay, Simsbury, Connecticut, United States of America, Juticalpa, Honduras, Tokyo Disney Resort, Japan, Lipetsk, Russia, Newcastle, South Africa, Khao Yai National Park, Thailand, Newton, Massachusetts, United States of America, Frankfort, Michigan, United States of America, Hamm, Germany, and Johnson, Vermont, United States of America.