Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 82°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Friday
29th May
82

50

9

7
Saturday
30th May
63

50

1

3
Sunday
31st May
50

41

1

2
Monday
1st Jun
59

41

7

3
Tuesday
2nd Jun
66

41

4

3

5-day weather forecast updated at 04:02 on Saturday 30th May 2026 GMT

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

Lewistown weather forecast by day

Below are the detailed weather forecasts for Lewistown for the next 5 days.

Lewistown weather for Friday 29th May 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 10-20 mm of rainfall expected with 38% chance of some rain and a light breeze of 5 mph from the north.

82
°F maximum temperature
50
°F minimum temperature
isolated thunderstorms
9
hours of sunshine
7
UV index (High)
38
% chance of some rain
<20
mm of rainfall expected
L
low heat & humidity
5
mph wind from N

Lewistown weather for Saturday 30th May 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 63°F, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 99% chance of some rain and a moderate breeze of 14 mph from the north-west.

63
°F maximum temperature
50
°F minimum temperature
isolated thunderstorms
1
hour of sunshine
3
UV index (Moderate)
99
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
14
mph wind from NW

Lewistown weather for Sunday 31st May 2026

Expect cloudy with some rain in Lewistown, Montana with a maximum temperature of 50°F, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 83% chance of some rain and a fresh breeze of 20 mph from the west.

50
°F maximum temperature
41
°F minimum temperature
cloudy with some rain
1
hour of sunshine
2
UV index (Low)
83
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
20
mph wind from W

Lewistown weather for Monday 1st June 2026

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 59°F, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 62% chance of some rain and a moderate breeze of 16 mph from the west.

59
°F maximum temperature
41
°F minimum temperature
sunshine and showers
7
hours of sunshine
3
UV index (Moderate)
62
% chance of some rain
<5
mm of rainfall expected
59
°F wind chill
16
mph wind from W

Lewistown weather for Tuesday 2nd June 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 66°F, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 38% chance of some rain and a gentle breeze of 11 mph from the north-west.