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Weather in Casper, Wyoming for May 2026

Your guide to Casper weather in May - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Casper during May is quite rare, with fewer than 2 snowy days on average.

    • Temperatures

  • In general, the average temperature in Casper at the beginning of May is 15.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 21 °F by the end of May.

    • Rain 🌧️

  • The climate of Casper in May is notably wet, with an average of 12 rainy days, and a total of 59.2 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
1
Snow days
Average temperatures
19°/4°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
57 %
Avg humidity

Casper Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Heavy rain at times
13°
2
Partly cloudy
17°
3
Sunny
23°
4
Patchy rain possible
22°
5
Moderate or heavy rain shower
14°
6
Light freezing rain
5°
7
Patchy rain possible
16°
8
Overcast
22°
9
Patchy rain possible
23°
10
Sunny
26°
11
Cloudy
26°
12
Partly cloudy
26°
13
Patchy rain possible
24°
14
Patchy rain possible
15°
15
Patchy rain possible
15°
16
Patchy rain possible
16°
17
Patchy rain possible
20°
18
Heavy rain at times
17°
19
Moderate or heavy rain shower
7°
20
Moderate rain at times
16°
21
Moderate or heavy rain shower
17°
22
Cloudy
23°
23
Sunny
21°
24
Patchy rain possible
14°
25
Thundery outbreaks possible
15°
26
Thundery outbreaks possible
15°
27
Mist
22°
28
Thundery outbreaks possible
19°
29
Partly cloudy
23°
30
Sunny
26°
31
Sunny
27°

Temperatures trend during May in Casper

See the weather trend as well as the moving average line

May weather in Casper day by day

Click on a date for more information
April June
Date Weather Temperatures Rain Snow More
May 1 Heavy rain at times
Heavy rain at times
 13° /0° 3.2 mm 0 cm
May 2 Partly cloudy
Partly cloudy
 17° /-1° 0 mm 0 cm
May 3 Sunny
Sunny
 23° /1° 0 mm 0 cm
May 4 Patchy rain possible
Patchy rain possible
 22° /4° 0.1 mm 0 cm
May 5 Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /2° 14.8 mm 0 cm
May 6 Light freezing rain
Light freezing rain
 5° /0° 9.3 mm 4.4 cm
May 7 Patchy rain possible
Patchy rain possible
 16° /2° 0.8 mm 0 cm
May 8 Overcast
Overcast
 22° /1° 0 mm 0 cm
May 9 Patchy rain possible
Patchy rain possible
 23° /5° 0.1 mm 0 cm
May 10 Sunny
Sunny
 26° /5° 0 mm 0 cm
May 11 Cloudy
Cloudy
 26° /10° 0 mm 0 cm
May 12 Partly cloudy
Partly cloudy
 26° /9° 0 mm 0 cm
May 13 Patchy rain possible
Patchy rain possible
 24° /10° 1 mm 0 cm
May 14 Patchy rain possible
Patchy rain possible
 15° /8° 1.1 mm 0 cm
May 15 Patchy rain possible
Patchy rain possible
 15° /3° 0.4 mm 0 cm
May 16 Patchy rain possible
Patchy rain possible
 16° /4° 0.7 mm 0 cm
May 17 Patchy rain possible
Patchy rain possible
 20° /2° 0.1 mm 0 cm
May 18 Heavy rain at times
Heavy rain at times
 17° /6° 4.9 mm 0 cm
May 19 Moderate or heavy rain shower
Moderate or heavy rain shower
 7° /1° 18.2 mm 0 cm
May 20 Moderate rain at times
Moderate rain at times
 16° /2° 0.7 mm 0 cm
May 21 Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /1° 2.6 mm 0 cm
May 22 Cloudy
Cloudy
 23° /0° 0.2 mm 0 cm
May 23 Sunny
Sunny
 21° /6° 0 mm 0 cm
May 24 Patchy rain possible
Patchy rain possible
 14° /7° 1 mm 0 cm
May 25 Thundery outbreaks possible
Thundery outbreaks possible
 15° /7° 0 mm 0 cm
May 26 Thundery outbreaks possible
Thundery outbreaks possible
 15° /4° 0 mm 0 cm
May 27 Mist
Mist
 22° /5° 0 mm 0 cm
May 28 Thundery outbreaks possible
Thundery outbreaks possible
 19° /6° 0 mm 0 cm
May 29 Partly cloudy
Partly cloudy
 23° /3° 0 mm 0 cm
May 30 Sunny
Sunny
 26° /7° 0 mm 0 cm
May 31 Sunny
Sunny
 27° /10° 0 mm 0 cm
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Important Notice
Our weather forecast for Casper in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Casper forecast closer to your planned date for the most up-to-date weather information.
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Casper in May - FAQ

What are the expected maximum and minimum temperatures in Casper during May?
During May, expect a variety of temperatures with highs around 19° and lows near 4°, suitable for diverse activities and preferences.
How much rainfall should be expected in Casper during May?
Moderate rainfall is anticipated in Casper during May, with a total of 59.2 mm spread over approximately 12 days. Considering plans for rainy days is advisable.
Will it snow in Casper in May 2026?
Casper typically sees 4.4 cm of snowfall during May.
What are the typical wind conditions in Casper during May?
The average wind speed in Casper during May is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

Casper snow forecast May 2026

Track daily snowfall levels and discover Casper’s snowy potential this May ❄️

May rainfall patterns in Casper

Explore the daily rainfall trends and prepare for Caspers May weather 💧

UV exposure in Casper during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️

Quick links

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Location coordinates Where is Casper?

Get accurate weather forecasts for Casper, located at latitude 42.867 and longitude -106.313. Stay updated with localized weather information tailored for Casper.

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