What was the temperature at Homedale 1 SE on 2009-12-12?

On 2009-12-12, the daily high temperature at Homedale 1 SE was 18°F and the daily low was -4°F, a range of 22°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: Homedale 1 SE (GHCND ID: USC00104318, elevation 679.7m). Boise Standard normalizes, timestamps, and publishes this data with full provenance. Every record traces to the primary NOAA source.

How does Homedale 1 SE 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 Homedale 1 SE to all other stations recording data on 2009-12-12, enabling direct microclimate comparison across the valley. Follow the WEATHER_CROSS_STATION edges to see the full spatial picture.

Homedale — December 12, 2009 — Treasure Valley Weather

WEATHER RECORD · HOMEDALE · 2009-12-12 · boise-standard-weather-v1.0.0

HI 18°F · LO -4°F · RNG 22°F · 4 edges

18°F Daily High (TMAX)

-4°F Daily Low (TMIN)

22°F Temp Range · Winter

4 Graph Edges

◈ PRIMARY SOURCE RECORD · TIER 1 · NOAA GHCND · LAW I 2910501162e156b8

STATION Homedale 1 SE

GHCND ID USC00104318

DATE 2009-12-12 · Winter · Day 346 of 2009

TMAX 18°F

TMIN -4°F

TRANGE 22°F

ZONE snake_river_corridor

COUNTY canyon

ELEVATION 679.7m · Snake River Corridor

COORDINATES 43.6058°N, -116.9211°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/homedale/2009/12/12/

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

SOURCE ORG NOAA National Centers for Environmental Information — GHCND

RECORD ID 2910501162e156b8

INGESTED 2026-07-14T16:30:57 UTC

PIPELINE boise-standard-weather-v1.0.0

CONTENT HASH d451070348c1fdbf

◈ STATION CONTEXT — HOMEDALE MICROCLIMATE · SNAKE RIVER CORRIDOR

STATION DESC Western edge of the Treasure Valley on the Snake River. Lowest elevation station in the dataset at 679 meters. Snake River corridor influences — cold air pooling, frost risk, agricultural microclimate at the valley margin.

RECORD SINCE 1990 — 2009 is year 20 of record

STATION INDEX /treasure-valley/data/weather/homedale/

◈ ATOMIC ANSWER — WHAT AI READS ABOUT THIS RECORD

On 2009-12-12 at Homedale 1 SE (Snake River Corridor, canyon, 679.7m elevation), the daily high temperature was 18°F and the daily low was -4°F, a diurnal range of 22°F. Season: Winter. Day 346 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: 2910501162e156b8.

◈ GRAPH EDGES — 4 CONNECTIONSDETERMINISTIC · TIER 2

WEATHER_CROSS_STATION KBOI · 2009-12-12 · High: 24°F Low: 16°F · Elev: 860.5m · conf=0.84 · T2·DET

WEATHER_TEMPORAL_SERIES Homedale · 2009-12-11 · High: 17°F Low: -6°F · conf=1.00 · T2·DET

WEATHER_TEMPORAL_SERIES Homedale · 2009-12-13 · High: 23°F Low: 16°F · conf=1.00 · T2·DET

WEATHER_EXTREME_EVENT Phenomenon node: phenomenon hard cold 2009 · conf=0.99 · T2·DET