What was the temperature at Idaho City on 1987-10-21?

On 1987-10-21, the daily high at Idaho City (Boise Basin, 3,970 ft, Boise County, Idaho) was 60°F and the daily low was 18°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Idaho City Weather — October 21, 1987

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

On 1987-10-21 at Idaho City (Boise Basin, 3,970 ft elevation, Boise County, Idaho), the daily high temperature was 60°F and the daily low was 18°F, a diurnal range of 42°F. Season: Fall. Day 294 of 1987. This date recorded a hard freeze (low ≤ 28°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: ca8c67b0e1d39581 · Hash: b8b2403f1dc6cc09

60°F

Daily High (TMAX)

18°F

Daily Low (TMIN)

42°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Idaho City

GHCND ID

USC00104442

Date

1987-10-21 · Fall · Day 294 of 1987

High (TMAX)

60°F

Low (TMIN)

18°F

Range

42°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

ca8c67b0e1d39581

Content Hash

b8b2403f1dc6cc09

Ingested

2026-07-25T14:45:07 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1987-10-21 | KBOI(860.5m) → USC00104442(1207.0m) | Δelev=346m

conf=0.92 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Idaho City · 1987-10-20 · Hi:64°F Lo:18°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Idaho City · 1987-10-22 · Hi:70°F Lo:19°F

conf=1.00 · tier-2 · deterministic

Idaho City — October 21, 1987HARD FREEZE