West Yellowstone weather live forecast

Today's maximum temperature in West Yellowstone is expected to be 19°C. Select a day from the live weather forecast for West Yellowstone, Montana, USA for more weather parameters.

Friday
18th Sep
19

3

2

5
Saturday
19th Sep
14

4

1

4
Sunday
20th Sep
16

1

3

3
Monday
21st Sep
20

0

8

5
Tuesday
22nd Sep
21

1

7

5

5-day weather forecast updated at 04:03 on Friday 18th September 2026 GMT

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The 5-day weather forecast for Montana (West Yellowstone) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

West Yellowstone weather forecast by day

Below are the detailed weather forecasts for West Yellowstone for the next 5 days.

West Yellowstone weather for Friday 18th September 2026

Expect isolated thunderstorms in West Yellowstone, Montana with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 75% chance of some rain and a light breeze of 9 kph from the south.

19
°C maximum temperature
3
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
5
UV index (Moderate)
75
% chance of some rain
<10
mm of rainfall expected
19
°C wind chill
9
kph wind from S

West Yellowstone weather for Saturday 19th September 2026

Expect mostly cloudy with rain in West Yellowstone, Montana with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 78% chance of some rain and a light breeze of 7 kph from the south-west.

14
°C maximum temperature
4
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
4
UV index (Moderate)
78
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
7
kph wind from SW

West Yellowstone weather for Sunday 20th September 2026

Expect mostly cloudy with light rain in West Yellowstone, Montana with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 30% chance of some rain and little or no wind of 6 kph from the south-west.

16
°C maximum temperature
1
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
3
UV index (Moderate)
30
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
6
kph wind from SW

West Yellowstone weather for Monday 21st September 2026

Expect fog in low lying areas in West Yellowstone, Montana with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the south-west.

20
°C maximum temperature
0
°C minimum temperature
fog in low lying areas
8
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
20
°C wind chill
6
kph wind from SW

West Yellowstone weather for Tuesday 22nd September 2026

Expect broken clouds in West Yellowstone, Montana with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-west.