Firth, ID Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Firth, ID in one place.
A chance of rain showers before 9am, then showers and thunderstorms likely between 9am and 3pm, then a slight chance of showers and thunderstorms between 3pm and 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 79. East southeast wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Firth, ID 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 3:40 PM MDT.
The active forecast window currently covers Sep 17 to Sep 22, 2026 for Firth, ID.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 22, 2026
- Latest sync
- Sep 16, 2026 3:40 PM MDT
- Forecast office
- PIH
- Source
- NOAA / NWS
Daily Outlook
This Week in Firth
Thursday looks like the warmest upcoming period in Firth at 79 degrees F.
Friday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Thursday at about 7 to 10 mph ESE.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 16, 2026 3:40 PM MDT
- Coverage
- 7 days
- Time zone
- America/Boise
- Forecast office
- PIH
- Radar station
- KSFX
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 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 49. East southeast wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
A chance of rain showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 72. South southwest wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 41. Chance of precipitation is 20%.
Mostly sunny, with a high near 70.
Partly cloudy, with a low around 41.
Sunny, with a high near 73.
Mostly clear, with a low around 42.
Sunny, with a high near 75.
Mostly clear, with a low around 42.
Sunny, with a high near 77.
Mostly clear, with a low around 42.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Showers And Thunderstorms Likely
|
79°F |
7 to 10 mph
ESE
|
|
Thursday Night
Sep 17
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
49°F |
5 to 9 mph
ESE
|
|
Friday
Sep 18
|
Chance Rain Showers
|
72°F |
5 to 10 mph
SSW
|
|
Friday Night
Sep 18
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
41°F |
5 to 9 mph
SW
|
|
Saturday
Sep 19
|
Mostly Sunny
|
70°F |
6 mph
SW
|
|
Saturday Night
Sep 19
|
Partly Cloudy
|
41°F |
2 to 6 mph
S
|
|
Sunday
Sep 20
|
Sunny
|
73°F |
3 mph
NNW
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
42°F |
3 mph
E
|
|
Monday
Sep 21
|
Sunny
|
75°F |
5 mph
N
|
|
Monday Night
Sep 21
|
Mostly Clear
|
42°F |
3 mph
S
|
|
Tuesday
Sep 22
|
Sunny
|
77°F |
5 mph
S
|
|
Tuesday Night
Sep 22
|
Mostly Clear
|
42°F |
5 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Firth.