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May 18th, 2026 :: 5:23 am MDT   

Local Weather Report for
Custer
South Dakota, United States

 Current Custer Weather Conditions Updated May 18th at 3:53 am 
Overcast
Temperature:37°F Dew Point:28°F
Barometer:29.83 inHg Wind:N 21 Mph
Humidity:69.6% Visibility:0M
 
 Custer Weather Forecast Summary  
 
Today
May 18th
Tuesday
May 19th
Wednesday
May 20th
Thursday
May 21st
Friday
May 22nd
Mix of rain and snow Sunny Mostly Sunny Mostly Cloudy with Showers Mostly Cloudy
44°F
58°F
31°F
68°F
42°F
66°F
44°F
57°F
48°F
 
 Custer Detailed Weather Forecast  
 
Monday, May 18th, 2026
Morning Temperature: 40°F
Cloudy with a chance of showers. Windy.
Afternoon Temperature: 39°F
Cloudy with showers likely. Showers possibly mixed with wet flurries. Windy at times.
Evening Temperature: 39°F
Cloudy with clear periods with a chance of showers. Showers possibly mixed with wet flurries.
Tuesday, May 19th, 2026
Overnight Temperature: 33°F
A mix of clear and cloudy skies.
Morning Temperature: 38°F
Sunny.
Afternoon Temperature: 55°F
Sunny. Windy at times.
Evening Temperature: 52°F
Clear. Windy at times.
Wednesday, May 20th, 2026
Overnight Temperature: 43°F
Mostly clear.
Morning Temperature: 49°F
Cloudy with sunny periods. Windy at times.
Afternoon Temperature: 66°F
Sunny. Windy at times.
Evening Temperature: 60°F
Mostly clear. Windy at times.
Thursday, May 21st, 2026
Overnight Temperature: 46°F
Clear.
Morning Temperature: 50°F
Mostly sunny.
Afternoon Temperature: 62°F
Mostly cloudy with showers likely. Slight chance of a thunderstorm. Windy.
Evening Temperature: 51°F
A mix of clear and cloudy skies with a few showers. Windy at times.
Friday, May 22nd, 2026
Overnight Temperature: 50°F
Cloudy.
Morning Temperature: 50°F
Mostly cloudy with a slight chance of showers. Windy at times.
Afternoon Temperature: 55°F
Cloudy. Windy.
Evening Temperature: 50°F
A mix of cloudy and clear skies with a slight chance of showers.
Saturday, May 23rd, 2026
Overnight Temperature: 46°F
Clear.
Morning Temperature: 53°F
Sunny.
Afternoon Temperature: 69°F
Sunny. Windy at times.
Evening Temperature: 67°F
Clear. Windy at times.
Sunday, May 24th, 2026
Overnight Temperature: 55°F
Clear.
Morning Temperature: 66°F
Sunny. Windy at times.
Afternoon Temperature: 82°F
Sunny. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 75°F
Mostly clear. Slight chance of a thunderstorm.
Monday, May 25th, 2026
Overnight Temperature: 62°F
Mostly clear.
Morning Temperature: 70°F
Mostly sunny. Windy.
Afternoon Temperature: 86°F
Sunny. Windy.
Evening Temperature: 79°F
Clear. Windy at times.
Tuesday, May 26th, 2026
Overnight Temperature: 66°F
Clear.
Morning Temperature: 72°F
Sunny. Windy at times.
Afternoon Temperature: 80°F
Sunny with cloudy periods. Slight chance of a thunderstorm. Windy.
Evening Temperature: 65°F
Clear with a chance of showers. Windy.





 

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3:53 AM  45°F
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Gillette, WY 
3:53 AM  37°F
Overcast
 
Douglas, WY 
3:53 AM  36°F
moderate rain mist

 
This WeatherCity Weather Forecast for Custer, South Dakota, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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