What was the temperature at Idaho City on 1989-09-21?

On 1989-09-21, the daily high at Idaho City (Boise Basin, 3,970 ft, Boise County, Idaho) was 77°F and the daily low was 32°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Idaho City Weather — September 21, 1989

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

On 1989-09-21 at Idaho City (Boise Basin, 3,970 ft elevation, Boise County, Idaho), the daily high temperature was 77°F and the daily low was 32°F, a diurnal range of 45°F. Season: Fall. Day 264 of 1989. This date recorded a frost event (low ≤ 36°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: 1ac6b754a1b71ca2 · Hash: 8db37c43e0ce9a15

77°F

Daily High (TMAX)

32°F

Daily Low (TMIN)

45°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Idaho City

GHCND ID

USC00104442

Date

1989-09-21 · Fall · Day 264 of 1989

High (TMAX)

77°F

Low (TMIN)

32°F

Range

45°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

1ac6b754a1b71ca2

Content Hash

8db37c43e0ce9a15

Ingested

2026-07-25T14:45:07 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1989-09-21 | KBOI(860.5m) → USC00104442(1207.0m) | Δelev=346m

conf=0.92 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Idaho City · 1989-09-20 · Hi:72°F Lo:32°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Idaho City · 1989-09-22 · Hi:77°F Lo:33°F

conf=1.00 · tier-2 · deterministic

Idaho City — September 21, 1989FROST EVENT