What was the temperature at Arrowrock Dam on 1999-10-18?

On 1999-10-18, the daily high at Arrowrock Dam (Boise River Basin, 3,241 ft, Boise County, Idaho) was 56°F and the daily low was 27°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Arrowrock Dam Weather — October 18, 1999

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

On 1999-10-18 at Arrowrock Dam (Boise River Basin, 3,241 ft elevation, Boise County, Idaho), the daily high temperature was 56°F and the daily low was 27°F, a diurnal range of 29°F. Season: Fall. Day 291 of 1999. This date recorded a hard freeze (low ≤ 28°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: a384260eb9b53d63 · Hash: 76abdd969070011e

56°F

Daily High (TMAX)

27°F

Daily Low (TMIN)

29°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Arrowrock Dam

GHCND ID

USC00100448

Date

1999-10-18 · Fall · Day 291 of 1999

High (TMAX)

56°F

Low (TMIN)

27°F

Range

29°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

a384260eb9b53d63

Content Hash

76abdd969070011e

Ingested

2026-07-25T14:45:12 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1999-10-18 | KBOI(860.5m) → USC00100448(988.0m) | Δelev=128m

conf=0.81 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1999-10-17 · Hi:54°F Lo:34°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1999-10-19 · Hi:62°F Lo:32°F

conf=1.00 · tier-2 · deterministic

Arrowrock Dam — October 18, 1999HARD FREEZE