Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 17°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Wednesday
25th Mar
17

3

1

4
Thursday
26th Mar
3

-5

8

5
Friday
27th Mar
10

-6

12

5
Saturday
28th Mar
18

-1

2

5
Sunday
29th Mar
19

4

6

5

5-day weather forecast updated at 04:03 on Wednesday 25th March 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 Wednesday 25th March 2026

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of sleet/snow expected with 64% chance of some sleet or snow and a moderate breeze of 23 kph from the north-west.

17
°C maximum temperature
3
°C minimum temperature
cloudy with sleet or snow
1
hour of sunshine
4
UV index (Moderate)
64
% chance of some sleet or snow
<5
mm of sleet/snow expected
0
no heat & humidity
23
kph wind from NW

Lewistown weather for Thursday 26th March 2026

Expect clear skies with flurries of snow in Lewistown, Montana with a maximum temperature of 3°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0-2 cm of snow expected with 24% chance of some snow and a moderate breeze of 28 kph from the north-west.

3
°C maximum temperature
-5
°C minimum temperature
clear skies with flurries of snow
8
hours of sunshine
5
UV index (Moderate)
24
% chance of some snow
<2
cm of snow expected
-2
°C wind chill
28
kph wind from NW

Lewistown weather for Friday 27th March 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 10°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south-west.

10
°C maximum temperature
-6
°C minimum temperature
clear skies
12
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
8
°C wind chill
16
kph wind from SW

Lewistown weather for Saturday 28th March 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-west.

18
°C maximum temperature
-1
°C minimum temperature
broken clouds
2
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
15
kph wind from SW

Lewistown weather for Sunday 29th March 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south-west.