Fossil, WY Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Fossil, WY in one place.
Mostly sunny, with a high near 73. Southeast wind 5 to 16 mph, with gusts as high as 26 mph.
Local Weather Overview
This forecast page for Fossil, 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 14, 2026 11:09 PM MDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Fossil, WY.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 14, 2026 11:09 PM MDT
- Forecast office
- RIW
- Source
- NOAA / NWS
Daily Outlook
This Week in Fossil
Tuesday looks like the warmest upcoming period in Fossil at 73 degrees F.
Saturday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Tuesday at about 5 to 16 mph SE.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 11:09 PM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- RIW
- Radar station
- KMTX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 42. South southwest wind 3 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 73. South southwest wind 6 to 12 mph, with gusts as high as 21 mph.
A chance of showers and thunderstorms. Partly cloudy, with a low around 43. Southeast wind 3 to 9 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 70. South southeast wind 6 to 9 mph. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40. South wind around 7 mph.
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 68.
A slight chance of showers and thunderstorms before midnight. Mostly clear, with a low around 36. Chance of precipitation is 20%.
Sunny, with a high near 67.
Mostly clear, with a low around 35.
Sunny, with a high near 69.
Mostly clear, with a low around 37.
Sunny, with a high near 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Sep 15
|
Mostly Sunny
|
73°F |
5 to 16 mph
SE
|
|
Tuesday Night
Sep 15
|
Partly Cloudy then Chance Showers And Thunderstorms
|
42°F |
3 to 15 mph
SSW
|
|
Wednesday
Sep 16
|
Sunny then Slight Chance Showers And Thunderstorms
|
73°F |
6 to 12 mph
SSW
|
|
Wednesday Night
Sep 16
|
Chance Showers And Thunderstorms
|
43°F |
3 to 9 mph
SE
|
|
Thursday
Sep 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
70°F |
6 to 9 mph
SSE
|
|
Thursday Night
Sep 17
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
40°F |
7 mph
S
|
|
Friday
Sep 18
|
Sunny then Slight Chance Showers And Thunderstorms
|
68°F |
5 to 10 mph
SW
|
|
Friday Night
Sep 18
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
36°F |
5 to 8 mph
WNW
|
|
Saturday
Sep 19
|
Sunny
|
67°F |
5 to 8 mph
WNW
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
35°F |
3 to 8 mph
W
|
|
Sunday
Sep 20
|
Sunny
|
69°F |
2 to 6 mph
W
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
37°F |
3 to 7 mph
N
|
|
Monday
Sep 21
|
Sunny
|
70°F |
3 to 7 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fossil.