What was the temperature at Arrowrock Dam on 1978-05-21?

On 1978-05-21, the daily high at Arrowrock Dam (Boise River Basin, 3,241 ft, Boise County, Idaho) was 76°F and the daily low was 46°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Arrowrock Dam Weather — May 21, 1978

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

On 1978-05-21 at Arrowrock Dam (Boise River Basin, 3,241 ft elevation, Boise County, Idaho), the daily high temperature was 76°F and the daily low was 46°F, a diurnal range of 30°F. Season: Spring. Day 141 of 1978.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: cd320b46de3e09a5 · Hash: a84b1596bc11d666

76°F

Daily High (TMAX)

46°F

Daily Low (TMIN)

30°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Arrowrock Dam

GHCND ID

USC00100448

Date

1978-05-21 · Spring · Day 141 of 1978

High (TMAX)

76°F

Low (TMIN)

46°F

Range

30°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

cd320b46de3e09a5

Content Hash

a84b1596bc11d666

Ingested

2026-07-25T14:45:12 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1978-05-21 | KBOI(860.5m) → USC00100448(988.0m) | Δelev=128m

conf=0.81 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1978-05-20 · Hi:71°F Lo:45°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1978-05-22 · Hi:80°F Lo:47°F

conf=1.00 · tier-2 · deterministic

Arrowrock Dam — May 21, 1978