Casper 7-day weather forecast

Written by:
March 23, 2026
ESOlex // Shutterstock

Casper 7-day weather forecast

Stacker created the forecast for Casper, Wyoming using data from OpenWeather. This week's high is 79 °F on Sunday, while the low is 23 °F on Tuesday. There are expected to be 2 sunny days and rain on 3 days this week.

NWS Riverton WY has issued a winter storm warning until Tuesday at 06:00 PM.

Monday, May 18

- High of 39 °F, low of 27 °F (98% humidity)
- Overcast with a 100% chance of rain (3 mm of rain)
- High risk of harm from sun exposure (5 UV index)
- Fresh breeze (20 mph wind)
- Sunrise at 5:39 AM, sunset at 8:24 PM
1 / 6
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Tuesday, May 19

- High of 43 °F, low of 23 °F (83% humidity)
- Partly cloudy with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 5:38 AM, sunset at 8:25 PM
2 / 6
ESOlex // Shutterstock

Wednesday, May 20

- High of 60 °F, low of 32 °F (64% humidity)
- Partly cloudy with a 0% chance of rain
- Very high risk of harm from sun exposure (8 UV index)
- Moderate breeze (16 mph wind)
- Sunrise at 5:37 AM, sunset at 8:26 PM
3 / 6
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Thursday, May 21

- High of 64 °F, low of 44 °F (34% humidity)
- Overcast with a 100% chance of rain (22 mm of rain)
- Moderate risk of harm from sun exposure (3 UV index)
- Strong breeze (28 mph wind)
- Sunrise at 5:36 AM, sunset at 8:27 PM
4 / 6
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Friday, May 22

- High of 56 °F, low of 39 °F (87% humidity)
- Overcast with a 100% chance of rain (2 mm of rain)
- Moderate risk of harm from sun exposure (3 UV index)
- Gentle breeze (11 mph wind)
- Sunrise at 5:36 AM, sunset at 8:28 PM
5 / 6
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Saturday, May 23

- High of 72 °F, low of 45 °F (33% humidity)
- Sunny with a 0% chance of rain
- Moderate risk of harm from sun exposure (3 UV index)
- Moderate breeze (16 mph wind)
- Sunrise at 5:35 AM, sunset at 8:29 PM
- First quarter moon
6 / 6
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Sunday, May 24

- High of 79 °F, low of 55 °F (29% humidity)
- Sunny with a 0% chance of rain
- Moderate risk of harm from sun exposure (3 UV index)
- Moderate breeze (14 mph wind)
- Sunrise at 5:34 AM, sunset at 8:30 PM

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