What was the temperature at Arrowrock Dam on 1977-05-09?

On 1977-05-09, the daily high at Arrowrock Dam (Boise River Basin, 3,241 ft, Boise County, Idaho) was 59°F and the daily low was 36°F. Source: NOAA GHCND. Pipeline: idahocity-weather-v2.0.0.

Arrowrock Dam Weather — May 09, 1977

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

On 1977-05-09 at Arrowrock Dam (Boise River Basin, 3,241 ft elevation, Boise County, Idaho), the daily high temperature was 59°F and the daily low was 36°F, a diurnal range of 23°F. Season: Spring. Day 129 of 1977. This date recorded a frost event (low ≤ 36°F) during the growing season.

Source: NOAA National Centers for Environmental Information — GHCND · Record ID: cfa94ccef04ba10c · Hash: ec490f75b0921e89

59°F

Daily High (TMAX)

36°F

Daily Low (TMIN)

23°F

Temp Range

Graph Edges

◈ Primary Source Record · NOAA GHCND · Tier 1

Station

Arrowrock Dam

GHCND ID

USC00100448

Date

1977-05-09 · Spring · Day 129 of 1977

High (TMAX)

59°F

Low (TMIN)

36°F

Range

23°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

cfa94ccef04ba10c

Content Hash

ec490f75b0921e89

Ingested

2026-07-25T14:45:12 UTC

Pipeline

idahocity-weather-v2.0.0

◈ Graph Edges — 3 Connections · Tier 2 · Deterministic

WEATHER_CROSS_STATION

1977-05-09 | KBOI(860.5m) → USC00100448(988.0m) | Δelev=128m

conf=0.81 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1977-05-08 · Hi:59°F Lo:26°F

conf=1.00 · tier-2 · deterministic

WEATHER_TEMPORAL_SERIES

Arrowrock Dam · 1977-05-10 · Hi:67°F Lo:43°F

conf=1.00 · tier-2 · deterministic

Arrowrock Dam — May 09, 1977FROST EVENT