What was the temperature at Arrowrock Dam on 1977-12-21?

On 1977-12-21, the daily high at Arrowrock Dam (Boise River Basin, 3,241 ft, Boise County, Idaho) was 25°F and the daily low was 10°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Arrowrock Dam Weather — December 21, 1977

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

On 1977-12-21 at Arrowrock Dam (Boise River Basin, 3,241 ft elevation, Boise County, Idaho), the daily high temperature was 25°F and the daily low was 10°F, a diurnal range of 15°F. Season: Winter. Day 355 of 1977.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: ff9bed8f932be007 · Hash: 1567c6ddb84d703d

25°F

Daily High (TMAX)

10°F

Daily Low (TMIN)

15°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Arrowrock Dam

GHCND ID

USC00100448

Date

1977-12-21 · Winter · Day 355 of 1977

High (TMAX)

25°F

Low (TMIN)

10°F

Range

15°F

Zone

Boise River Basin

Elevation

3,241 ft · 988 m

Coordinates

43.6°N, 115.9167°W

Geography

boise_county

Source Tier

Tier 1 — Primary Federal Source — NOAA GHCND

Confidence

0.95

Record ID

ff9bed8f932be007

Content Hash

1567c6ddb84d703d

Ingested

2026-07-25T14:45:12 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 4 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1977-12-21 | KBOI(860.5m) → USC00100448(988.0m) | Δelev=128m

conf=0.81 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1977-12-20 · Hi:27°F Lo:11°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1977-12-22 · Hi:30°F Lo:19°F

conf=1.00 · tier-2 · deterministic

WEATHER_EXTREME_EVENT

Phenomenon: phenomenon hard cold 1977

conf=0.99 · tier-2 · deterministic

Arrowrock Dam — December 21, 1977