Casper weather live forecast

Today's maximum temperature in Casper is expected to be 13°C. Select a day from the live weather forecast for Casper, Wyoming, USA for more weather parameters.

Sunday
17th May
13

4

3

6
Monday
18th May
4

0

0

5
Tuesday
19th May
9

-1

12

10
Wednesday
20th May
15

0

9

8
Thursday
21st May
12

4

0

7

5-day weather forecast updated at 04:00 on Monday 18th May 2026 GMT

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

Casper weather forecast by day

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

Casper weather for Sunday 17th May 2026

Expect mostly cloudy with light rain in Casper, Wyoming with a maximum temperature of 13°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 93% chance of some rain and a moderate breeze of 27 kph from the north-east.

13
°C maximum temperature
4
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
6
UV index (High)
93
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
27
kph wind from NE

Casper weather for Monday 18th May 2026

Expect cloudy with sleet or snow in Casper, Wyoming with a maximum temperature of 4°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 10-20 mm of sleet/snow expected with 92% chance of some sleet or snow and a fresh breeze of 38 kph from the north-east.

4
°C maximum temperature
0
°C minimum temperature
cloudy with sleet or snow
0
hours of sunshine
5
UV index (Moderate)
92
% chance of some sleet or snow
<20
mm of sleet/snow expected
-2
°C wind chill
38
kph wind from NE

Casper weather for Tuesday 19th May 2026

Expect sunshine and showers in Casper, Wyoming with a maximum temperature of 9°C, maximum UV of 10 (Very High) and 12 hours of bright sunshine. There are 0-2 mm of rainfall expected with 2% chance of some rain and a gentle breeze of 13 kph from the south-west.

9
°C maximum temperature
-1
°C minimum temperature
sunshine and showers
12
hours of sunshine
10
UV index (Very High)
2
% chance of some rain
<2
mm of rainfall expected
7
°C wind chill
13
kph wind from SW

Casper weather for Wednesday 20th May 2026

Expect scattered clouds in Casper, Wyoming with a maximum temperature of 15°C, maximum UV of 8 (Very High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the south-west.

15
°C maximum temperature
0
°C minimum temperature
scattered clouds
9
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
18
kph wind from SW

Casper weather for Thursday 21st May 2026

Expect mostly cloudy with light rain in Casper, Wyoming with a maximum temperature of 12°C, maximum UV of 7 (High) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 52% chance of some rain and a gentle breeze of 15 kph from the north.