Firth, ID Weather Forecast

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Firth, ID Weather Forecast

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Firth ID weather  - Clear - 58°F
Clear
58°F
Updated 9:13 pm
Feels Like 47°F
Humidity 40%
Wind S 9 mph
Barometer  30.11 in
Dew Point 34°F
Firth ID weather  - Clear - 14°C
Clear
14°C
Updated 9:13 pm
Feels Like 8°C
Humidity 40%
Wind S 14 km/h
Barometer  102 kPa
Dew Point 1°C

Firth Weather Forecast

TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SUNDAY MONDAY
Firth, ID Weather - Tonight Mostly Clear Firth, ID Weather - Tuesday Sunny Firth, ID Weather - Tuesday Night Mostly Clear Firth, ID Weather - Wednesday Sunny Firth, ID Weather - Wednesday Night Chance Of Rain Firth, ID Weather - Thursday Chance Of T-Storm Firth, ID Weather - Thursday Night Chance Of T-Storm Firth, ID Weather - Friday Chance Of Rain Firth, ID Weather - Friday Night Chance Of Rain Firth, ID Weather - Saturday Mostly Clear Firth, ID Weather - Sunday Mostly Clear Firth, ID Weather - Monday Mostly Clear
Mostly Clear Sunny Mostly Clear Sunny Chance of Rain Chance of T-Storm Chance of T-Storm Chance of Rain Chance of Rain Mostly Clear Mostly Clear Mostly Clear
Lo: 38°FLo: 3°C Hi: 76°FHi: 24°C
Lo: 45°FLo: 7°C Hi: 80°FHi: 27°C
Lo: 52°FLo: 11°C Hi: 78°FHi: 26°C
Lo: 49°FLo: 9°C Hi: 73°FHi: 23°C
Lo: 44°FLo: 7°C
Hi: 73°FHi: 23°C
Lo: 44°FLo: 7°C
Hi: 77°FHi: 25°C
Lo: 45°FLo: 7°C
Hi: 77°FHi: 25°C
Lo: 45°FLo: 7°C
Hi: 77°FHi: 25°C
Lo: 45°FLo: 7°C
POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 1232 PM MDT Mon Sep 14 2026 Firth, ID Weather - WeatherWorld.com

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Issued: 559 PM MDT Mon Sep 14 2026

Key Messages

  • Frost possible across portions of Snake Plain tonight, mainly outside the interstate corridor.
  • Next chance of rain late week.

Discussion

... Issued at 114 PM MDT Mon Sep 14 2026

Cool temperatures remain in place today behind frontal system that passed through this weekend. Winds remain breezy as well, but overall impact will be greatest overnight as lows fall to coldest of the week. NBM retains a wide swath of sub-36 degree lows across the Snake River Plain, but traditional NAM and GFS ...