What was the temperature at Arrowrock Dam on 1991-04-09?

On 1991-04-09, the daily high at Arrowrock Dam (Boise River Basin, 3,241 ft, Boise County, Idaho) was 51°F and the daily low was 25°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Arrowrock Dam Weather — April 09, 1991

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

On 1991-04-09 at Arrowrock Dam (Boise River Basin, 3,241 ft elevation, Boise County, Idaho), the daily high temperature was 51°F and the daily low was 25°F, a diurnal range of 26°F. Season: Spring. Day 99 of 1991. This date recorded a hard freeze (low ≤ 28°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: 348cc957ab9dcf5b · Hash: 3e61363d6a1c0366

51°F

Daily High (TMAX)

25°F

Daily Low (TMIN)

26°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Arrowrock Dam

GHCND ID

USC00100448

Date

1991-04-09 · Spring · Day 99 of 1991

High (TMAX)

51°F

Low (TMIN)

25°F

Range

26°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

348cc957ab9dcf5b

Content Hash

3e61363d6a1c0366

Ingested

2026-07-25T14:45:12 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1991-04-09 | KBOI(860.5m) → USC00100448(988.0m) | Δelev=128m

conf=0.81 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1991-04-08 · Hi:51°F Lo:25°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1991-04-10 · Hi:43°F Lo:29°F

conf=1.00 · tier-2 · deterministic

Arrowrock Dam — April 09, 1991HARD FREEZE