What was the temperature at Arrowrock Dam on 1989-07-21?

On 1989-07-21, the daily high at Arrowrock Dam (Boise River Basin, 3,241 ft, Boise County, Idaho) was 101°F and the daily low was 64°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Arrowrock Dam Weather — July 21, 1989

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

On 1989-07-21 at Arrowrock Dam (Boise River Basin, 3,241 ft elevation, Boise County, Idaho), the daily high temperature was 101°F and the daily low was 64°F, a diurnal range of 37°F. Season: Summer. Day 202 of 1989. This date recorded a heat event (high ≥ 95°F) at 3,241 ft.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: c37a3dafbc2a1b40 · Hash: 038f4f9fe701f4eb

101°F

Daily High (TMAX)

64°F

Daily Low (TMIN)

37°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Arrowrock Dam

GHCND ID

USC00100448

Date

1989-07-21 · Summer · Day 202 of 1989

High (TMAX)

101°F

Low (TMIN)

64°F

Range

37°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

c37a3dafbc2a1b40

Content Hash

038f4f9fe701f4eb

Ingested

2026-07-25T14:45:12 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 4 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1989-07-21 | KBOI(860.5m) → USC00100448(988.0m) | Δelev=128m

conf=0.81 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1989-07-20 · Hi:106°F Lo:61°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1989-07-22 · Hi:92°F Lo:59°F

conf=1.00 · tier-2 · deterministic

WEATHER_EXTREME_EVENT

Phenomenon: phenomenon heat event 1989

conf=0.99 · tier-2 · deterministic

Arrowrock Dam — July 21, 1989HEAT EVENT