What was the temperature at Idaho City on 1975-09-21?

On 1975-09-21, the daily high at Idaho City (Boise Basin, 3,970 ft, Boise County, Idaho) was 75°F and the daily low was 29°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Idaho City Weather — September 21, 1975

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

On 1975-09-21 at Idaho City (Boise Basin, 3,970 ft elevation, Boise County, Idaho), the daily high temperature was 75°F and the daily low was 29°F, a diurnal range of 46°F. Season: Fall. Day 264 of 1975. This date recorded a frost event (low ≤ 36°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: 44eb5bf93d61bf87 · Hash: 86da88cc227c3a7e

75°F

Daily High (TMAX)

29°F

Daily Low (TMIN)

46°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Idaho City

GHCND ID

USC00104442

Date

1975-09-21 · Fall · Day 264 of 1975

High (TMAX)

75°F

Low (TMIN)

29°F

Range

46°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

44eb5bf93d61bf87

Content Hash

86da88cc227c3a7e

Ingested

2026-07-25T14:45:07 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1975-09-21 | KBOI(860.5m) → USC00104442(1207.0m) | Δelev=346m

conf=0.92 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Idaho City · 1975-09-20 · Hi:70°F Lo:29°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Idaho City · 1975-09-22 · Hi:81°F Lo:30°F

conf=1.00 · tier-2 · deterministic

Idaho City — September 21, 1975FROST EVENT