St. Mary, Montana, United States of America: What to pack, what to wear, and when to go [2022]
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Traveling to St. Mary, Montana, United States of America? If you're planning to go to St. Mary, I've got some important information about when to go, what to wear, and what to pack.
Contents
- When to go to St. Mary
- Important essentials for St. Mary
- Activities for St. Mary
- St. Mary in January: weather and what to pack
- St. Mary in February: weather and what to pack
- St. Mary in March: weather and what to pack
- St. Mary in April: weather and what to pack
- St. Mary in May: weather and what to pack
- St. Mary in June: weather and what to pack
- St. Mary in July: weather and what to pack
- St. Mary in August: weather and what to pack
- St. Mary in September: weather and what to pack
- St. Mary in October: weather and what to pack
- St. Mary in November: weather and what to pack
- St. Mary in December: weather and what to pack

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 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.
Important essentials 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.
COVID-19 ESSENTIALS FOR 2022
Travel insurance that includes COVID-19 coverage
Cases are climbing again, and areas are returning to lockdown. If you or a companion get COVID-19, you may be stuck with no way home -- but travel insurance can protect you. Learn more about COVID-19 and travel insurance
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Hand sanitizer
This hand sanitizer is an easy-to-carry plane-friendly choice.
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Travel disinfecting wipes
Use these to sanitize plane and hotel surfaces.
-
Kids' KN95 masks
N95 masks don't exist for kids. These are a good alternative (and can also be used by adults if N95 masks are not available).
-
Touchless thermometer
A touchless thermometer is important to have.
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(U.S. Residents) Telehealth COVID-19 test for entry to U.S.
U.S. residents still need a certified COVID-19 test to return home, but it can now be via Zoom. Learn more
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A vaccine card protector
Vaccine cards frequently become worn. An unreadable vaccine card can have severe consequences. This vaccine card protector helps avoid that.
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N95 masks
These N95 masks provide the best level of protection you can have.
General health necessities
Don't forget these
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Voice and data SIM card
A SIM card that works in St. Mary. A good global SIM card works in most countries, but check the country list before buying.
-
Airplane or car necessities
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Plug adapter
A plug adapter that supports outlet types A and B. This one is sufficent for most places, but you should check with your hotel.
-
Power bank for devices
A portable power bank, like this one
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For families with young children
-
Money/passport pouch
A money pouch is vital for protecting your passport and credit cards.
What to wear/what to pack for St. Mary, Montana, United States of America by month
Already know when you're traveling?
January
If you go to St. Mary in January, you will notice that it can be extremely cold. Expect it to snow about a third of the time. Daytime temperatures are in the low 30s F (single digits C).
What to wear/what to pack:
-
Scarf/neck warmer
-
Insulated ice boots
We use:
-
Pajamas
-
Thermal undergarments
We suggest:
-
Lip balm
The best choice: here
-
Fleece inner layer
-
Coveralls/snow pants
Here are some of the best choices:
-
Extreme weather jacket shell
These are a great value:
-
Heavy sweaters
-
Extreme cold weather gloves
-
Very heavy heated socks
Like these
-
Waterproof snow boots
In addition to day-to-day shoes, you should bring snow boots. For travel to St. Mary, we suggest these boots:
-
Waterproof jacket that can be used in snow
-
A umbrella
This is essential in this type of weather. This one is a perfect choice.
February
February for St. Mary is very cold. Temperatures average in the 30s F (single digits C) during the day. It snows 5-10 days this month.
What to wear/what to pack:
-
Thermal undergarments
We chose:
-
Insulated ice boots
We use:
-
Extreme weather jacket shell
These are a great value:
-
Scarf/neck warmer
-
Lip balm
The best is: this
-
Fleece inner layer
-
Heavy sweaters
-
Pajamas
-
Very heavy heated socks
Like these
-
Coveralls/snow pants
Here are some of the best choices:
-
Extreme cold weather gloves
-
Waterproof snow boots
In addition to regular footwear, it's important to bring snow boots. For travel to St. Mary, we suggest these boots:
-
Waterproof jacket that can be used in snow
-
A windproof umbrella
This is essential here. This one is a great choice.
March
If you go to St. Mary in March, you will notice that it is pretty cool. Expect it to snow about a third of the time. Daytime temperatures are in the low 40s F (single digits C).
What to wear/what to pack:
-
Gloves
-
Heavy jacket
-
Insulated water bottle
Our first choice:
-
Warm pants or jeans
-
Lip balm
Our choice: this one
-
Heavy socks
Such as:
-
Sweaters
-
Cold weather footwear
-
Waterproof snow boots
In addition to day-to-day shoes, you should bring snow boots. For traveling to St. Mary, a great option is these boots:
-
Waterproof jacket that can be used in snow
-
A umbrella
This is worth investing in for this weather. This one is a great choice.
April
April in St. Mary can be brisk. The rain/snow can amount to several inches/centimeters. During this time, temperatures average in the low 30s F (single digits C) to low 50s F (low 10s C), although night temperatures can dip into the low 20s F (single digits below 0 C).
What to wear/what to pack:
-
Heavy socks
Such as:
-
Gloves
-
Lip balm
Our choice: here
-
Heavy jacket
-
Warm pants or jeans
-
Sweaters
-
Insulated water bottle
Our pick:
-
Cold weather footwear
-
Waterproof snow boots
In addition to regular shoes, you should bring snow boots. For travel to St. Mary, a great option is these boots:
-
Waterproof jacket that can be used in snow
-
A windproof umbrella
This is vital here. This one is a perfect choice.
May
May in St. Mary is relatively cool. Temperatures average in the low 60s F (mid 10s C) during the day.
What to wear/what to pack:
-
Extra socks
-
Fleece
-
Lip balm
In our opinion, the best is: this
-
Jacket or coat
-
Light gloves or mittens
-
Warm pants or jeans
-
Standard footwear
-
A rain jacket to layer with another jacket
-
100% waterproof footwear
We suggest rain boots:
-
Rain pants
Rain pants can be vital in a rainstorm.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is a perfect choice.
-
Waterproof bag/luggage cover
So your suitcases don't get wet. We suggest:
June
Traveling to St. Mary in June, you will notice that it is mild. Daytime temperatures are in the high 60s F (low 20s C).
What to wear/what to pack:
-
Extra socks
-
Light jacket or fleece
-
Pants or jeans
-
Standard footwear
-
Dresses
-
Light and heavy skirts
-
Long sleeve shirts or blouses
-
A rain jacket to layer with another jacket
-
100% waterproof footwear
We use rain boots:
-
Rain pants
These are vital in a rainstorm.
-
Waterproof phone bag
-
Umbrella
This one is a perfect one to buy.
-
Waterproof bag/luggage cover
So your things stay dry. We suggest:
July
If you visit St. Mary during July, you may notice that it is a perfect temperature. Temperatures tend to hover around the high 70s F (mid 20s C) during the day, while at night they can dip into the high 40s F (single digits C).
What to wear/what to pack:
-
Bug repellent
-
Sandals
-
Light dresses
You can find some great options here
-
Sunscreen lotion
-
Long and short sleeve shirts
-
Extra socks
-
Short pants or heavy shorts
-
Breathable footwear or sandals
-
Light skirts
-
A rain poncho to layer with a jacket
-
100% waterproof footwear
We like these rain boots:
-
Rain pants
These can be essential in a rainstorm.
-
Waterproof phone bag
-
Wind resistant umbrella
This one is an excellent option.
-
Waterproof bag/luggage cover
So your suitcases stay dry. We recommend:
August
If you are traveling to St. Mary in August, you will notice that it is a perfect temperature. Daytime temperatures are in the high 70s F (mid 20s C).
What to wear/what to pack:
-
Bug repellent
-
Extra socks
-
Long and short sleeve shirts
-
Sunscreen lotion
-
Light dresses
You can find some great options here
-
Light skirts
-
Short pants or heavy shorts
-
Sandals
-
Breathable footwear or sandals
-
A rain poncho to layer with a coat
-
100% waterproof footwear
We recommend these rain boots:
-
Rain pants
These will be a lifesaver in a rainstorm.
-
Waterproof phone bag
-
Umbrella
This one is a great one to buy.
-
Waterproof bag/luggage cover
So your suitcases don't get wet. We like:
September
September in this region is balmy. Temperatures average in the 60s F (high 10s C) during the day.
What to wear/what to pack:
-
Warm pants or jeans
-
Light gloves or mittens
-
Jacket or coat
-
Lip balm
In our opinion, the best choice: this one
-
Extra socks
-
Fleece
-
Standard footwear
-
A rain coat to layer with a jacket
-
100% waterproof footwear
We use these rain boots:
-
Rain pants
Rain pants are essential in a rainstorm.
-
Waterproof phone bag
-
Windproof umbrella
This one is a great choice.
-
Waterproof bag/luggage cover
So your belongings remain dry. We recommend:
October
If you visit St. Mary during October, you may see that it is pretty cool. 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:
-
Warm pants or jeans
-
Jacket or coat
-
Fleece
-
Light gloves or mittens
-
Extra socks
-
Lip balm
In our opinion, the best option: this
-
Standard footwear
-
Waterproof snow boots
In addition to standard footwear, you should bring snow boots. For traveling to St. Mary, we suggest these boots:
-
Waterproof jacket that can be used in snow
-
A umbrella
This is essential in this type of weather. This one is a great option.
November
November in this region can be brisk. Temperatures average in the high 30s F (single digits C) during the day. It snows about a third of the time.
What to wear/what to pack:
-
Lip balm
Our pick: this
-
Heavy jacket
-
Warm pants or jeans
-
Sweaters
-
Gloves
-
Heavy socks
Such as:
-
Insulated water bottle
Our best choice:
-
Cold weather footwear
-
Waterproof snow boots
In addition to standard footwear, you should bring snow boots. For travel to St. Mary, we suggest these boots:
-
Waterproof jacket that can be used in snow
-
A wind resistant umbrella
This is vital here. This one is a perfect option.
December
Traveling to St. Mary in December, you will notice that it is freezing. Expect it to snow about a third of the time. Daytime temperatures are in the low 30s F (single digits below 0 C).
What to wear/what to pack:
-
Lip balm
The best pick: this
-
Extreme weather jacket shell
These are a great value:
-
Heavy sweaters
-
Scarf/neck warmer
-
Very heavy heated socks
Like these
-
Insulated ice boots
We use:
-
Pajamas
-
Coveralls/snow pants
Here are some of our favorites:
-
Extreme cold weather gloves
-
Thermal undergarments
We love:
-
Fleece inner layer
-
Waterproof snow boots
In addition to day-to-day footwear, it's important to bring snow boots. For traveling to St. Mary, we suggest these boots:
-
Waterproof jacket that can be used in snow
-
A windproof umbrella
This is important here. This one is a great choice.
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