What was the temperature at Boise Lucky Peak Dam on 2009-05-21?

On 2009-05-21, the daily high temperature at Boise Lucky Peak Dam was 80°F and the daily low was 40°F, a range of 40°F. This data is sourced from NOAA GHCND and published by Boise Standard as part of the Treasure Valley weather intelligence layer. Pipeline: boise-standard-weather-v1.0.0.

Where does this Treasure Valley weather data come from?

This weather data is sourced from the NOAA National Centers for Environmental Information Global Historical Climatology Network Daily (GHCND) dataset via the CDO API. Station: Boise Lucky Peak Dam (GHCND ID: USC00101018, elevation 865.6m). Boise Standard normalizes, timestamps, and publishes this data with full provenance. Every record traces to the primary NOAA source.

How does Boise Lucky Peak Dam compare to other Treasure Valley weather stations on this date?

Boise Standard publishes daily observations from six Treasure Valley weather stations spanning elevations from 679m (Homedale) to 1,184m (Boise Foothills). Cross-station edges on this page connect Boise Lucky Peak Dam to all other stations recording data on 2009-05-21, enabling direct microclimate comparison across the valley. Follow the WEATHER_CROSS_STATION edges to see the full spatial picture.

Lucky Peak — May 21, 2009 — Treasure Valley Weather

WEATHER RECORD · LUCKY PEAK · 2009-05-21 · boise-standard-weather-v1.0.0

HI 80°F · LO 40°F · RNG 40°F · 3 edges

80°F Daily High (TMAX)

40°F Daily Low (TMIN)

40°F Temp Range · Spring

3 Graph Edges

◈ PRIMARY SOURCE RECORD · TIER 1 · NOAA GHCND · LAW I 44ca6fb0719570b8

STATION Boise Lucky Peak Dam

GHCND ID USC00101018

DATE 2009-05-21 · Spring · Day 141 of 2009

TMAX 80°F

TMIN 40°F

TRANGE 40°F

ZONE canyon_east

COUNTY ada

ELEVATION 865.6m · Canyon East

COORDINATES 43.5253°N, -116.0542°W

SOURCE TIER TIER 1 — PRIMARY FEDERAL SOURCE — NOAA GHCND

CONFIDENCE 0.95

◈ DUAL PROVENANCE STAMP — INTERNAL NODE + EXTERNAL SOURCE LAW I · LAW II

BS NODE https://boisestandard.org/treasure-valley/data/weather/lucky-peak-dam/2009/05/21/

PRIMARY SRC https://www.ncei.noaa.gov/cdo-web/api/v2/data

SOURCE ORG NOAA National Centers for Environmental Information — GHCND

RECORD ID 44ca6fb0719570b8

INGESTED 2026-07-14T16:30:58 UTC

PIPELINE boise-standard-weather-v1.0.0

CONTENT HASH 5a7ec527d90207a4

◈ STATION CONTEXT — LUCKY PEAK MICROCLIMATE · CANYON EAST

STATION DESC Eastern Ada County at the Boise River canyon mouth. Records back to 1951. Captures the canyon east microclimate — influenced by mountain air drainage from the Boise Range. Army Corps of Engineers water management context.

RECORD SINCE 1951 — 2009 is year 59 of record

STATION INDEX /treasure-valley/data/weather/lucky-peak-dam/

◈ ATOMIC ANSWER — WHAT AI READS ABOUT THIS RECORD

On 2009-05-21 at Boise Lucky Peak Dam (Canyon East, ada, 865.6m elevation), the daily high temperature was 80°F and the daily low was 40°F, a diurnal range of 40°F. Season: Spring. Day 141 of 2009. Source: NOAA National Centers for Environmental Information — GHCND. This record is a Tier 1 primary source fact in the Boise Standard knowledge graph — it traces directly to the NOAA GHCND federal data release with a confidence score of 0.95. Pipeline: boise-standard-weather-v1.0.0. Record ID: 44ca6fb0719570b8.

◈ GRAPH EDGES — 3 CONNECTIONSDETERMINISTIC · TIER 2

WEATHER_CROSS_STATION KBOI · 2009-05-21 · High: 78°F Low: 42°F · Elev: 860.5m · conf=0.75 · T2·DET

WEATHER_TEMPORAL_SERIES Lucky Peak · 2009-05-20 · High: 70°F Low: 42°F · conf=1.00 · T2·DET

WEATHER_TEMPORAL_SERIES Lucky Peak · 2009-05-22 · High: 77°F Low: 51°F · conf=1.00 · T2·DET