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Annual Summary · Boise River Basin · NOAA GHCND

Arrowrock Dam — 1997

Arrowrock Dam · 3,241 ft · Boise County, Idaho

64°F
Avg High
40°F
Avg Low
102°F
Year Max
7°F
Year Min
◈ Monthly Breakdown — 1997
January
Avg Hi: 36°F Avg Lo: 23°F 25 days
February
Avg Hi: 42°F Avg Lo: 27°F 17 days
March
Avg Hi: 56°F Avg Lo: 30°F 20 days
April
Avg Hi: 60°F Avg Lo: 36°F 26 days
May
Avg Hi: 75°F Avg Lo: 45°F 23 days
June
Avg Hi: 81°F Avg Lo: 52°F 27 days
July
Avg Hi: 89°F Avg Lo: 56°F 26 days
August
Avg Hi: 91°F Avg Lo: 58°F 28 days
September
Avg Hi: 82°F Avg Lo: 51°F 30 days
October
Avg Hi: 62°F Avg Lo: 37°F 28 days
November
Avg Hi: 48°F Avg Lo: 32°F 30 days
December
Avg Hi: 35°F Avg Lo: 23°F 31 days
◈ Source Record
Station
Arrowrock Dam · USC00100448
Year
1997 · 311 days of records
Elevation
3,241 ft · 988m
Source
NOAA GHCND — CDO API ↗
Pipeline
idahocity-weather-v2.0.0 · 2026-07-25
← All Years ← All Stations
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Authoritative Sources
🌦️NOAA GHCND — Climate Data Online↗ ◈Boise Standard · Idaho City↗ 🏛️Boise County Official↗ 🤝Idaho City Chamber of Commerce↗ 🗺️Visit Southwest Idaho↗ 📊U.S. Census · Idaho City↗ 📚Britannica · Idaho City↗ 🏺Idaho City Historical Foundation↗
Wikipedia · Geographic Context
🏙️Idaho City, Idaho↗ 📍Boise County, Idaho↗ 🌿Garden Valley, Idaho↗ 🌲Lowman, Idaho↗ 🏔️Boise, Idaho↗
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