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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.
    According to Casper snow forecast for May 2026, no snow is expected in the next 2 weeks.

    • Temperatures

  • Until now, May 2026 in Casper is slightly cooler than the historical average by -1.1 °F.

  • The forecast for the coming days of May 2026 predicts a temperature of 22 °F , which is warmer than usual.

  • In general, the average temperature in Casper at the beginning of May is 15.3 °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
14°
2
Partly cloudy
19°
3
Sunny
22°
4
Patchy rain possible
18°
5
Moderate or heavy rain shower
10°
6
Light freezing rain
7°
7
Patchy rain possible
17°
8
Overcast
21°
9
Moderate rain
15°
10
Sunny
22°
11
Sunny
27°
12
Sunny
24°
13
Patchy rain possible
30°
14
Partly cloudy
26°
15
Moderate rain
17°
16
Sunny
24°
17
Sunny
25°
18
Sunny
22°
19
Sunny
21°
20
Sunny
24°
21
Patchy rain possible
18°
22
Patchy rain possible
13°
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
 14° /0° 1.6 mm 0 cm
May 2 Partly cloudy
Partly cloudy
 19° /0° 0 mm 0 cm
May 3 Sunny
Sunny
 22° /2° 0 mm 0 cm
May 4 Patchy rain possible
Patchy rain possible
 18° /4° 0.1 mm 0 cm
May 5 Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /1° 9.4 mm 0 cm
May 6 Light freezing rain
Light freezing rain
 7° /-2° 4.7 mm 2.2 cm
May 7 Patchy rain possible
Patchy rain possible
 17° /3° 4.3 mm 0 cm
May 8 Overcast
Overcast
 21° /4° 1.3 mm 0 cm
May 9 Moderate rain
Moderate rain
 15° /7° 5.2 mm 0 cm
May 10 Sunny
Sunny
 22° /3° 0 mm 0 cm
May 11 Sunny
Sunny
 27° /9° 0 mm 0 cm
May 12 Sunny
Sunny
 24° /9° 0 mm 0 cm
May 13 Patchy rain possible
Patchy rain possible
 30° /10° 0.1 mm 0 cm
May 14 Partly cloudy
Partly cloudy
 26° /16° 0 mm 0 cm
May 15 Moderate rain
Moderate rain
 17° /9° 6.1 mm 0 cm
May 16 Sunny
Sunny
 24° /5° 0 mm 0 cm
May 17 Sunny
Sunny
 25° /12° 0 mm 0 cm
May 18 Sunny
Sunny
 22° /4° 0 mm 0 cm
May 19 Sunny
Sunny
 21° /10° 0 mm 0 cm
May 20 Sunny
Sunny
 24° /4° 0 mm 0 cm
May 21 Patchy rain possible
Patchy rain possible
 18° /9° 0.3 mm 0 cm
May 22 Patchy rain possible
Patchy rain possible
 13° /8° 2.6 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
Next
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 ❄️
On average, Casper sees 1 snowy days during May, with approximately 4.4 cm of total snowfall.

May rainfall patterns in Casper

Explore the daily rainfall trends and prepare for Caspers May weather 💧
Typically, Casper has 12 rainy days in May with a total of 59.2 mm of rainfall.

UV exposure in Casper during May

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

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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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