IC
Idaho City
Boise County · Est. 1862
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Historical Weather · Boise Basin · idahocity-weather-v2.0.0

Idaho City — September 20, 1986FROST EVENT

Idaho City · 3,970 ft · Boise Basin · Boise County, Idaho

◈ Atomic Answer · NOAA GHCND · Tier 1 Primary Source · idahocity-weather-v2.0.0

On 1986-09-20 at Idaho City (Boise Basin, 3,970 ft elevation, Boise County, Idaho), the daily high temperature was 53°F and the daily low was 32°F, a diurnal range of 21°F. Season: Fall. Day 263 of 1986. This date recorded a frost event (low ≤ 36°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: 9b97e1228fd91ed9 · Hash: 28dc1a01d6903b3f
53°F
Daily High (TMAX)
32°F
Daily Low (TMIN)
21°F
Temp Range
3
Graph Edges
◈ Primary Source Record · NOAA GHCND · Tier 1
Station
Idaho City
GHCND ID
USC00104442
Date
1986-09-20 · Fall · Day 263 of 1986
High (TMAX)
53°F
Low (TMIN)
32°F
Range
21°F
Zone
Boise Basin
Elevation
3,970 ft · 1,210 m
Coordinates
43.8333°N, 115.8333°W
Geography
idaho_city
Source Tier
Tier 1 — Primary Federal Source — NOAA GHCND
Confidence
0.95
Record ID
9b97e1228fd91ed9
Content Hash
28dc1a01d6903b3f
Ingested
2026-07-25T14:45:07 UTC
Pipeline
idahocity-weather-v2.0.0
◈ Graph Edges — 3 Connections · Tier 2 · Deterministic
WEATHER_CROSS_STATION
1986-09-20 | KBOI(860.5m) → USC00104442(1207.0m) | Δelev=346m
conf=0.92 · tier-2 · deterministic
WEATHER_TEMPORAL_SERIES
Idaho City · 1986-09-19 · Hi:56°F Lo:30°F
conf=1.00 · tier-2 · deterministic
WEATHER_TEMPORAL_SERIES
Idaho City · 1986-09-21 · Hi:45°F Lo:33°F
conf=1.00 · tier-2 · deterministic
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