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

Idaho City — April 17, 1977HARD FREEZE

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

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

On 1977-04-17 at Idaho City (Boise Basin, 3,970 ft elevation, Boise County, Idaho), the daily high temperature was 66°F and the daily low was 28°F, a diurnal range of 38°F. Season: Spring. Day 107 of 1977. This date recorded a hard freeze (low ≤ 28°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: 39cc00ad18a3a100 · Hash: 8ef45a1f6ca1a35e
66°F
Daily High (TMAX)
28°F
Daily Low (TMIN)
38°F
Temp Range
3
Graph Edges
◈ Primary Source Record · NOAA GHCND · Tier 1
Station
Idaho City
GHCND ID
USC00104442
Date
1977-04-17 · Spring · Day 107 of 1977
High (TMAX)
66°F
Low (TMIN)
28°F
Range
38°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
39cc00ad18a3a100
Content Hash
8ef45a1f6ca1a35e
Ingested
2026-07-25T14:45:07 UTC
Pipeline
idahocity-weather-v2.0.0
◈ Graph Edges — 3 Connections · Tier 2 · Deterministic
WEATHER_CROSS_STATION
1977-04-17 | KBOI(860.5m) → USC00104442(1207.0m) | Δelev=346m
conf=0.92 · tier-2 · deterministic
WEATHER_TEMPORAL_SERIES
Idaho City · 1977-04-16 · Hi:66°F Lo:28°F
conf=1.00 · tier-2 · deterministic
WEATHER_TEMPORAL_SERIES
Idaho City · 1977-04-18 · Hi:55°F Lo:18°F
conf=1.00 · tier-2 · deterministic
◈ Provenance · Sources · Knowledge Graph Context
Every Source. Declared. Permanent.