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Big Fir Picnic Area, ID Weather Forecast
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Big Fir Picnic Area Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY |
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| Sunny | Partly Cloudy | Mostly Sunny | Chance of Rain | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Partly Cloudy |
| Hi: 94°FHi: 34°C | Lo: 64°FLo: 18°C | Hi: 96°FHi: 36°C | Lo: 66°FLo: 19°C | Hi: 88°FHi: 31°C | Lo: 60°FLo: 16°C | Hi: 84°FHi: 29°C | Lo: 58°FLo: 14°C | Hi: 83°FHi: 28°C Lo: 57°FLo: 14°C | Hi: 83°FHi: 28°C Lo: 57°FLo: 14°C | Hi: 85°FHi: 29°C Lo: 58°FLo: 14°C | Hi: 85°FHi: 29°C Lo: 58°FLo: 14°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1231 AM MDT Thu Aug 20 2026 
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Issued: 1030 PM MDT Wed Aug 19 2026
Key Messages
- Mid-to-Late Week Heat Surge: Temperatures will steadily rise, reaching the low-to-upper 90s across lower valleys Thursday and Friday. Heat advisories are in effect for Thursday and Friday.
- Monsoon Moisture Returns: Models show a high pressure ridge shifting east with an approaching low system, which will bring moisture from our south back into the area. Wetter and cooler conditions will return for the weekend into next week.
- Increased Fire Danger Saturda...