Lewistown weather live forecast

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

Tuesday
9th Jun
19

8

2

7
Wednesday
10th Jun
12

6

1

6
Thursday
11th Jun
17

6

6

7
Friday
12th Jun
18

6

11

8
Saturday
13th Jun
14

7

5

7

5-day weather forecast updated at 04:02 on Tuesday 9th June 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 Tuesday 9th June 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 7 (High) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 78% chance of some rain and a moderate breeze of 22 kph from the west.

19
°C maximum temperature
8
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
7
UV index (High)
78
% chance of some rain
<2
mm of rainfall expected
19
°C wind chill
22
kph wind from W

Lewistown weather for Wednesday 10th June 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 12°C, maximum UV of 6 (High) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 77% chance of some rain and a strong breeze of 39 kph from the west.

12
°C maximum temperature
6
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
6
UV index (High)
77
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
39
kph wind from W

Lewistown weather for Thursday 11th June 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 17°C, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 45% chance of some rain and a fresh breeze of 32 kph from the west.

17
°C maximum temperature
6
°C minimum temperature
mostly cloudy with light rain
6
hours of sunshine
7
UV index (High)
45
% chance of some rain
<5
mm of rainfall expected
17
°C wind chill
32
kph wind from W

Lewistown weather for Friday 12th June 2026

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 8 (Very High) and 11 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a gentle breeze of 17 kph from the north-west.

18
°C maximum temperature
6
°C minimum temperature
sunshine and showers
11
hours of sunshine
8
UV index (Very High)
25
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
17
kph wind from NW

Lewistown weather for Saturday 13th June 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 14°C, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 55% chance of some rain and a gentle breeze of 17 kph from the north-west.