What was the temperature at Arrowrock Dam on 1991-05-20?

On 1991-05-20, the daily high at Arrowrock Dam (Boise River Basin, 3,241 ft, Boise County, Idaho) was 63°F and the daily low was 36°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Arrowrock Dam Weather — May 20, 1991

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

On 1991-05-20 at Arrowrock Dam (Boise River Basin, 3,241 ft elevation, Boise County, Idaho), the daily high temperature was 63°F and the daily low was 36°F, a diurnal range of 27°F. Season: Spring. Day 140 of 1991. This date recorded a frost event (low ≤ 36°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: 6558d61c64e12f13 · Hash: 1da2e3841fb1fdac

63°F

Daily High (TMAX)

36°F

Daily Low (TMIN)

27°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Arrowrock Dam

GHCND ID

USC00100448

Date

1991-05-20 · Spring · Day 140 of 1991

High (TMAX)

63°F

Low (TMIN)

36°F

Range

27°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

6558d61c64e12f13

Content Hash

1da2e3841fb1fdac

Ingested

2026-07-25T14:45:12 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1991-05-20 | KBOI(860.5m) → USC00100448(988.0m) | Δelev=128m

conf=0.81 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1991-05-19 · Hi:62°F Lo:34°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1991-05-21 · Hi:74°F Lo:39°F

conf=1.00 · tier-2 · deterministic

Arrowrock Dam — May 20, 1991FROST EVENT