St. Mary, Montana, United States of America: What to pack, what to wear, and when to go [2018]

Traveling to St. Mary, Montana, United States of America? If you're planning to go to St. Mary, here is some important information about when to go, what to wear, and what to pack:

When to go to St. Mary, Montana, United States of America

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

What to wear/what to pack for St. Mary, Montana, United States of America by month

January

Traveling to St. Mary in January, you will notice that it is frigid. Expect it to snow 5-10 days this month. Daytime temperatures are in the low 30s F (single digits C).

What to wear/what to pack:

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

February

February in St. Mary can be extremely cold. Temperatures average in the 30s F (single digits C) during the day. It snows a bit less than half of the time.

What to wear/what to pack:

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

March

March in St. Mary is cold.

The rain/snow can amount to several inches/centimeters. During this time, temperatures average in the 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:

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

April

If you go to St. Mary in April, you will notice that it can be brisk. Expect it to snow sometimes. Daytime temperatures are in the low 50s F (low 10s C).

What to wear/what to pack:

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

May

May here can be chilly. Temperatures average in the low 60s F (mid 10s C) during the day.

What to wear/what to pack:

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

June

If you vacation in St. Mary during June, you are likely to find that it is mild.

Temperatures tend to hover around the high 60s F (low 20s C) during the day, while at night they can dip into the low 40s F (single digits C).

What to wear/what to pack:

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

July

If you are traveling to St. Mary in July, you will notice that it is warm. Daytime temperatures are in the high 70s F (mid 20s C).

What to wear/what to pack:

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

August

August in St. Mary is a perfect temperature. The average overnight temperatures in the area are in the 40s F (single digits C).

What to wear/what to pack:

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

September

September in this region is mild. Temperatures average in the 60s F (high 10s C) during the day.

What to wear/what to pack:

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

October

If you vacation in St. Mary during October, you are likely to find that it can be brisk.

Temperatures tend to hover around the low 50s F (low 10s C) during the day, while at night they can dip into the low 30s F (single digits C).

What to wear/what to pack:

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

November

In November, St. Mary is cold. Temperatures routinely are in the high 30s F (single digits C) and about half of the time jump into the low 40s F (single digits C) range.

At night, lows are in the low 20s F (single digits below 0 C). This is also a rainy time for St. Mary, with several of the days of the month having rain.

What to wear/what to pack:

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

December

December here is freezing. Temperatures average in the low 30s F (single digits below 0 C) during the day. It snows about a third of the time.

What to wear/what to pack:

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

Year-round what to wear/what to pack for St. Mary, Montana, United States of America

Here are some general tips on what to wear in St. Mary, 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 St. Mary

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