What was the temperature at Arrowrock Dam on 1991-10-31?

On 1991-10-31, the daily high at Arrowrock Dam (Boise River Basin, 3,241 ft, Boise County, Idaho) was 39°F and the daily low was 17°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Arrowrock Dam Weather — October 31, 1991

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

On 1991-10-31 at Arrowrock Dam (Boise River Basin, 3,241 ft elevation, Boise County, Idaho), the daily high temperature was 39°F and the daily low was 17°F, a diurnal range of 22°F. Season: Fall. Day 304 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: bf8645dd45e7450e · Hash: 3af0e438cf1ccae3

39°F

Daily High (TMAX)

17°F

Daily Low (TMIN)

22°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Arrowrock Dam

GHCND ID

USC00100448

Date

1991-10-31 · Fall · Day 304 of 1991

High (TMAX)

39°F

Low (TMIN)

17°F

Range

22°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

bf8645dd45e7450e

Content Hash

3af0e438cf1ccae3

Ingested

2026-07-25T14:45:12 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1991-10-31 | KBOI(860.5m) → USC00100448(988.0m) | Δelev=128m

conf=0.81 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1991-10-30 · Hi:35°F Lo:18°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1991-11-01 · Hi:37°F Lo:25°F

conf=1.00 · tier-2 · deterministic

Arrowrock Dam — October 31, 1991HARD FREEZE