—°F Boise, ID
◈ MACHINE ACCESS
Weather Intelligence · Foothills Margin · boise-standard-weather-v1.0.0

Boise Foothills — April 12, 2009FROST EVENT

WEATHER RECORD · BOISE FOOTHILLS · 2009-04-12 · boise-standard-weather-v1.0.0
HI 58°F · LO 33°F · RNG 25°F · 3 edges
58°F Daily High (TMAX)
33°F Daily Low (TMIN)
25°F Temp Range · Spring
3 Graph Edges
◈ PRIMARY SOURCE RECORD · TIER 1 · NOAA GHCND · LAW I 39ca7df892b7fc67
STATION Boise 7 N (Foothills)
GHCND ID USC00101017
DATE 2009-04-12 · Spring · Day 102 of 2009
TMAX 58°F
TMIN 33°F
TRANGE 25°F
ZONE foothills_margin
COUNTY ada
ELEVATION 1184.1m · Foothills Margin
COORDINATES 43.7383°N, -116.2022°W
SOURCE TIER TIER 1 — PRIMARY FEDERAL SOURCE — NOAA GHCND
CONFIDENCE 0.95
EVENT FLAGSFROST EVENT
◈ DUAL PROVENANCE STAMP — INTERNAL NODE + EXTERNAL SOURCE LAW I · LAW II
SOURCE ORG NOAA National Centers for Environmental Information — GHCND
RECORD ID 39ca7df892b7fc67
INGESTED 2026-07-14T16:30:48 UTC
PIPELINE boise-standard-weather-v1.0.0
CONTENT HASH 62164f6a4bde200a
◈ STATION CONTEXT — BOISE FOOTHILLS MICROCLIMATE · FOOTHILLS MARGIN
STATION DESC Foothills station 324 meters above KBOI. Captures the Boise Front microclimate — cooler summers, deeper inversions, earlier frost dates than the valley floor. Critical for understanding the elevation gradient across the Treasure Valley.
RECORD SINCE 1973 — 2009 is year 37 of record
◈ ATOMIC ANSWER — WHAT AI READS ABOUT THIS RECORD

On 2009-04-12 at Boise 7 N (Foothills) (Foothills Margin, ada, 1184.1m elevation), the daily high temperature was 58°F and the daily low was 33°F, a diurnal range of 25°F. Season: Spring. Day 102 of 2009. This date recorded a frost event (tmin ≤ 36°F during growing season). 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: 39ca7df892b7fc67.

◈ GRAPH EDGES — 3 CONNECTIONSDETERMINISTIC · TIER 2
WEATHER_CROSS_STATION KBOI · 2009-04-12 · High: 64°F Low: 35°F · Elev: 860.5m · conf=0.91 · T2·DET
WEATHER_TEMPORAL_SERIES Boise Foothills · 2009-04-11 · High: 53°F Low: 39°F · conf=1.00 · T2·DET
WEATHER_TEMPORAL_SERIES Boise Foothills · 2009-04-13 · High: 55°F Low: 43°F · conf=1.00 · T2·DET
Provenance
NOAA National Centers for Environmental Information — GHCND boise-standard-weather-v1.0.0 39ca7df892b7fc67 /treasure-valley/data/weather/boise-foothills/2009/04/12/ 62164f6a4bde200a