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

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

When to go to Sarnia, Ontario, Canada

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

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

January

In January, Sarnia is freezing and somewhat snowy. Temperatures routinely are in the low 20s F (single digits below 0 C) and about half of the time jump into the low 30s F (single digits C) range. At night, lows are in the high 10s F (single digits below 0 C).

This is also a rainy time for Sarnia, with a few of the days of the month having rain. In January, humidity reaches as high as 80%.

What to wear/what to pack:

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

February

February in Sarnia is freezing and somewhat snowy. The rain/snow can amount to several inches/centimeters.

During this time, temperatures average in the low 30s F (single digits C), although night temperatures can dip into the single digits F (10+ below zero C).

What to wear/what to pack:

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

March

March in Sarnia can be very chilly. The average overnight temperatures in the area are in the 20s F (single digits below 0 C). It tends to rain regularly.

It also snows about a third of the time. But the colder weather doesn't bring low humidity, which is in the 70% to 80% range on average.

What to wear/what to pack:

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

April

If you go to Sarnia in April, you will notice that it is brisk 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:

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

May

May in Sarnia is crisp and somewhat rainy. The average overnight temperatures in the area are in the 40s F (single digits C).

It tends to rain about half of the time. But the colder weather doesn't bring low humidity, which is in the 50% to 60% range on average.

What to wear/what to pack:

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

June

Traveling to Sarnia in June, you will notice that it is a perfect temperature and somewhat rainy. Expect it to rain regularly. Daytime temperatures are in the 70s F (mid 20s C).

What to wear/what to pack:

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

July

July in Sarnia is a perfect temperature and somewhat rainy. Temperatures average in the low 70s F (mid 20s C) during the day. It rains about a third of the time.

What to wear/what to pack:

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

August

In August, Sarnia 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 Sarnia, with several of the days of the month having rain. In August, humidity reaches as high as 70%.

What to wear/what to pack:

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

September

If you vacation in Sarnia during September, you are likely to find that it is mild and somewhat rainy. Temperatures tend to hover around the low 70s F (low 20s C) during the day, while at night they can dip into the low 50s F (low 10s C).

Humidity is generally between 60 and 70% during the day. In terms of precipitation, you can expect it to rain about a third of the time.

What to wear/what to pack:

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

October

In October, Sarnia is relatively cool and somewhat rainy. Temperatures routinely are in the high 50s F (mid 10s C) and once in a while jump into the low 70s F (low 20s C) range. At night, lows are in the low 40s F (single digits C).

This is also a rainy time for Sarnia, with several of the days of the month having rain. In October, humidity reaches as high as 70%.

What to wear/what to pack:

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

November

If you are traveling to Sarnia in November, you will notice that it can be very chilly and somewhat rainy. Expect it to rain 5-10 days this month and snow occasionally.

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

What to wear/what to pack:

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

December

December here is frosty and somewhat snowy. Temperatures average in the 30s F (single digits C) during the day. It rains a bit less than half of the time and snows about a third of the time.

What to wear/what to pack:

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

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

Here are some general tips on what to wear in Sarnia, 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 Sarnia

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