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Best time to visit Missoula, MT, USA

Our verdict

The best time to visit Missoula is September

Based on all the essential things any traveller needs to know about visiting Missoula such as the cost of travel, weather, peak travel seasons and many more, September is the best time of year to go.

In summer, the temperature in Missoula can rise as high as 29℃ (84℉). In the winter months, it can get down to as low as -18℃ (0℉) at night.

If you want to get the most out of your time visiting Missoula, or you’re just afraid of the dark, the days in July are usually the longest between sunrise and sunset. April sees the most amount of rain in a month if you’re ok with chancing getting drenched, so if you’re looking to stay dry, visit in July instead.

Find out everything you need to know about when to visit Missoula below, including detailed information about the weather and tools to help you find the best prices and book your trip.

Warmest month

July

Least rainfall

July

Most daylight

July

Missoula seasons

Before you continue, it’s important to know when the seasons are in Missoula as they might be different to yours depending on where in the world you’re travelling from. Missoula is in the Northern Hemisphere, so the seasons fall during these months:

SeasonMonths
Summer June to August
Autumn/fall September to November
Winter December to February
Spring March to May

Average temperatures in Missoula

If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Missoula for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.

Missoula climate by month

If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Missoula for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.

Jump to:

JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC

Missoula in January

  • Average temperature: -5℃ (23℉)
  • Average high temperature: -1℃ (30℉)
  • Average low temperature: -9℃ (17℉)
  • Average humidity: 90%
  • Average sunny days: 22 days
  • Average rainfall: 5mm (0") over 6 days
  • Average snow days: 9 days
22 days
of pure sunshine
6 days
of showers or rain

What to pack: If you’re heading to Missoula in January, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Missoula in February

  • Average temperature: -5℃ (24℉)
  • Average high temperature: -1℃ (31℉)
  • Average low temperature: -9℃ (16℉)
  • Average humidity: 88%
  • Average sunny days: 19 days
  • Average rainfall: 8mm (0") over 5 days
  • Average snow days: 8 days
19 days
of pure sunshine
5 days
of showers or rain

What to pack: If you’re heading to Missoula in February, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Missoula in March

  • Average temperature: -1℃ (31℉)
  • Average high temperature: 4℃ (40℉)
  • Average low temperature: -5℃ (23℉)
  • Average humidity: 84%
  • Average sunny days: 21 days
  • Average rainfall: 5mm (0") over 8 days
  • Average snow days: 7 days
21 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Missoula in March, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Missoula in April

  • Average temperature: 3℃ (38℉)
  • Average high temperature: 9℃ (48℉)
  • Average low temperature: -3℃ (27℉)
  • Average humidity: 77%
  • Average sunny days: 18 days
  • Average rainfall: 12mm (0") over 9 days
  • Average snow days: 4 days
18 days
of pure sunshine
9 days
of showers or rain

What to pack: If you’re heading to Missoula in April, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Missoula in May

  • Average temperature: 9℃ (48℉)
  • Average high temperature: 16℃ (60℉)
  • Average low temperature: 1℃ (34℉)
  • Average humidity: 68%
  • Average sunny days: 21 days
  • Average rainfall: 10mm (0") over 7 days
  • Average snow days: 1 days
21 days
of pure sunshine
7 days
of showers or rain

What to pack: If you’re heading to Missoula in May, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Missoula in June

  • Average temperature: 13℃ (55℉)
  • Average high temperature: 20℃ (69℉)
  • Average low temperature: 5℃ (41℉)
  • Average humidity: 63%
  • Average sunny days: 22 days
  • Average rainfall: 4mm (0") over 4 days
22 days
of pure sunshine
4 days
of showers or rain

What to pack: If you’re heading to Missoula in June, make sure you pack a good jacket, thermals and some extra layers as it gets cold at night, but it warms up a lot in the daytime so pack a few short-sleeved shirts.


Missoula in July

  • Average temperature: 18℃ (64℉)
  • Average high temperature: 27℃ (80℉)
  • Average low temperature: 8℃ (47℉)
  • Average humidity: 50%
  • Average sunny days: 27 days
  • Average rainfall: 4mm (0") over 3 days
27 days
of pure sunshine
3 days
of showers or rain

What to pack: If you’re heading to Missoula in July, make sure you pack a coat or jumper for the evenings, and t-shirts and light gear for the daytime.


Missoula in August

  • Average temperature: 17℃ (63℉)
  • Average high temperature: 26℃ (79℉)
  • Average low temperature: 8℃ (47℉)
  • Average humidity: 51%
  • Average sunny days: 26 days
  • Average rainfall: 5mm (0") over 3 days
26 days
of pure sunshine
3 days
of showers or rain

What to pack: If you’re heading to Missoula in August, make sure you pack a coat or jumper for the evenings, and t-shirts and light gear for the daytime.


Missoula in September

  • Average temperature: 12℃ (54℉)
  • Average high temperature: 20℃ (69℉)
  • Average low temperature: 5℃ (41℉)
  • Average humidity: 57%
  • Average sunny days: 25 days
  • Average rainfall: 6mm (0") over 4 days
25 days
of pure sunshine
4 days
of showers or rain

What to pack: If you’re heading to Missoula in September, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.

Missoula in October

  • Average temperature: 5℃ (40℉)
  • Average high temperature: 11℃ (52℉)
  • Average low temperature: -0℃ (32℉)
  • Average humidity: 71%
  • Average sunny days: 23 days
  • Average rainfall: 7mm (0") over 5 days
  • Average snow days: 1 days
23 days
of pure sunshine
5 days
of showers or rain

What to pack: If you’re heading to Missoula in October, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Missoula in November

  • Average temperature: -2℃ (29℉)
  • Average high temperature: 3℃ (38℉)
  • Average low temperature: -5℃ (23℉)
  • Average humidity: 82%
  • Average sunny days: 22 days
  • Average rainfall: 6mm (0") over 5 days
  • Average snow days: 5 days
22 days
of pure sunshine
5 days
of showers or rain

What to pack: If you’re heading to Missoula in November, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Missoula in December

  • Average temperature: -6℃ (22℉)
  • Average high temperature: -2℃ (28℉)
  • Average low temperature: -9℃ (16℉)
  • Average humidity: 88%
  • Average sunny days: 22 days
  • Average rainfall: 4mm (0") over 7 days
  • Average snow days: 9 days
22 days
of pure sunshine
7 days
of showers or rain

What to pack: If you’re heading to Missoula in December, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Top FAQs

The hottest month of the year in Missoula is usually July, where temperatures tend to rise to around 27℃ (80℉) in the middle of the day or early afternoon.
The month with the least amount of rain in Missoula is generally around July. The dry season often coincides with cooler weather, so you should check the temperatures in July first to make sure it’s still a good time to go.
The rainiest time of year in Missoula is generally around April, although the wetter season can sometimes extend a few months either side of April too.
If you want to get the most out of your time visiting Missoula, or if you're just afraid of the dark, the days in July are usually the longest between sunrise and sunset.

Missoula map