Cooper Lake, WY Weather Forecast
Local 7-day forecast
Rain Showers Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Cooper Lake, WY in one place.
Rain showers likely before noon, then showers and thunderstorms likely. Mostly cloudy, with a high near 69. South wind 5 to 10 mph. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Cooper Lake, WY is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 16, 2026 5:45 PM MDT.
The active forecast window currently covers Sep 17 to Sep 22, 2026 for Cooper Lake, WY.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 22, 2026
- Latest sync
- Sep 16, 2026 5:45 PM MDT
- Forecast office
- CYS
- Source
- NOAA / NWS
Daily Outlook
This Week in Cooper Lake
Friday looks like the warmest upcoming period in Cooper Lake at 73 degrees F.
Sunday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Sunday at about 5 to 20 mph WNW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 16, 2026 5:45 PM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- CYS
- Radar station
- KCYS
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 47. West southwest wind 5 to 10 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 73. West southwest wind 5 to 15 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 46. Chance of precipitation is 30%.
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 69.
Showers and thunderstorms likely. Partly cloudy, with a low around 41.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Mostly sunny, with a high near 65.
Mostly clear, with a low around 39.
Sunny, with a high near 70.
Mostly clear, with a low around 41.
Sunny, with a high near 71.
Mostly clear, with a low around 41.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Rain Showers Likely
|
69°F |
5 to 10 mph
S
|
|
Thursday Night
Sep 17
|
Slight Chance Showers And Thunderstorms then Mostly Cloudy
|
47°F |
5 to 10 mph
WSW
|
|
Friday
Sep 18
|
Partly Sunny then Chance Showers And Thunderstorms
|
73°F |
5 to 15 mph
WSW
|
|
Friday Night
Sep 18
|
Chance Showers And Thunderstorms
|
46°F |
5 to 10 mph
SW
|
|
Saturday
Sep 19
|
Mostly Sunny then Chance Showers And Thunderstorms
|
69°F |
5 to 10 mph
WSW
|
|
Saturday Night
Sep 19
|
Showers And Thunderstorms Likely
|
41°F |
5 to 10 mph
WSW
|
|
Sunday
Sep 20
|
Chance Rain Showers
|
65°F |
5 to 20 mph
WNW
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
39°F |
0 to 15 mph
WSW
|
|
Monday
Sep 21
|
Sunny
|
70°F |
0 to 10 mph
W
|
|
Monday Night
Sep 21
|
Mostly Clear
|
41°F |
5 to 10 mph
SSW
|
|
Tuesday
Sep 22
|
Sunny
|
71°F |
0 to 5 mph
WSW
|
|
Tuesday Night
Sep 22
|
Mostly Clear
|
41°F |
5 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cooper Lake.