What was the temperature at Idaho City on 1970-04-21?

On 1970-04-21, the daily high at Idaho City (Boise Basin, 3,970 ft, Boise County, Idaho) was 49°F and the daily low was 18°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Idaho City Weather — April 21, 1970

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

On 1970-04-21 at Idaho City (Boise Basin, 3,970 ft elevation, Boise County, Idaho), the daily high temperature was 49°F and the daily low was 18°F, a diurnal range of 31°F. Season: Spring. Day 111 of 1970. This date recorded a hard freeze (low ≤ 28°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: c6d3f8370ff75505 · Hash: 0b2bbeb77dfcca0a

49°F

Daily High (TMAX)

18°F

Daily Low (TMIN)

31°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Idaho City

GHCND ID

USC00104442

Date

1970-04-21 · Spring · Day 111 of 1970

High (TMAX)

49°F

Low (TMIN)

18°F

Range

31°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

c6d3f8370ff75505

Content Hash

0b2bbeb77dfcca0a

Ingested

2026-07-25T14:45:07 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1970-04-21 | KBOI(860.5m) → USC00104442(1207.0m) | Δelev=346m

conf=0.92 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Idaho City · 1970-04-20 · Hi:40°F Lo:29°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Idaho City · 1970-04-22 · Hi:50°F Lo:22°F

conf=1.00 · tier-2 · deterministic

Idaho City — April 21, 1970HARD FREEZE