What was the temperature at Arrowrock Dam on 1991-08-18?

On 1991-08-18, the daily high at Arrowrock Dam (Boise River Basin, 3,241 ft, Boise County, Idaho) was 98°F and the daily low was 55°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Arrowrock Dam Weather — August 18, 1991

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

On 1991-08-18 at Arrowrock Dam (Boise River Basin, 3,241 ft elevation, Boise County, Idaho), the daily high temperature was 98°F and the daily low was 55°F, a diurnal range of 43°F. Season: Summer. Day 230 of 1991. This date recorded a heat event (high ≥ 95°F) at 3,241 ft.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: 5fc138cb9aeb477e · Hash: e5e72e063a90a658

98°F

Daily High (TMAX)

55°F

Daily Low (TMIN)

43°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Arrowrock Dam

GHCND ID

USC00100448

Date

1991-08-18 · Summer · Day 230 of 1991

High (TMAX)

98°F

Low (TMIN)

55°F

Range

43°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

5fc138cb9aeb477e

Content Hash

e5e72e063a90a658

Ingested

2026-07-25T14:45:12 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1991-08-18 | KBOI(860.5m) → USC00100448(988.0m) | Δelev=128m

conf=0.81 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1991-08-17 · Hi:92°F Lo:55°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1991-08-19 · Hi:98°F Lo:56°F

conf=1.00 · tier-2 · deterministic

Arrowrock Dam — August 18, 1991HEAT EVENT