What was the temperature at Boise 7 N (Foothills) on 2002-04-21?

On 2002-04-21, the daily high temperature at Boise 7 N (Foothills) was 58°F and the daily low was 32°F, a range of 26°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 7 N (Foothills) (GHCND ID: USC00101017, elevation 1184.1m). Boise Standard normalizes, timestamps, and publishes this data with full provenance. Every record traces to the primary NOAA source.

How does Boise 7 N (Foothills) 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 7 N (Foothills) to all other stations recording data on 2002-04-21, enabling direct microclimate comparison across the valley. Follow the WEATHER_CROSS_STATION edges to see the full spatial picture.

Boise Foothills — April 21, 2002 — Treasure Valley Weather

WEATHER RECORD · BOISE FOOTHILLS · 2002-04-21 · boise-standard-weather-v1.0.0

HI 58°F · LO 32°F · RNG 26°F · 3 edges

58°F Daily High (TMAX)

32°F Daily Low (TMIN)

26°F Temp Range · Spring

3 Graph Edges

◈ PRIMARY SOURCE RECORD · TIER 1 · NOAA GHCND · LAW I 0d751b76de09ce5d

STATION Boise 7 N (Foothills)

GHCND ID USC00101017

DATE 2002-04-21 · Spring · Day 111 of 2002

TMAX 58°F

TMIN 32°F

TRANGE 26°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

BS NODE https://boisestandard.org/treasure-valley/data/weather/boise-foothills/2002/04/21/

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

SOURCE ORG NOAA National Centers for Environmental Information — GHCND

RECORD ID 0d751b76de09ce5d

INGESTED 2026-07-14T16:30:48 UTC

PIPELINE boise-standard-weather-v1.0.0

CONTENT HASH d24ec98df352de9f

◈ 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 — 2002 is year 30 of record

STATION INDEX /treasure-valley/data/weather/boise-foothills/

◈ ATOMIC ANSWER — WHAT AI READS ABOUT THIS RECORD

On 2002-04-21 at Boise 7 N (Foothills) (Foothills Margin, ada, 1184.1m elevation), the daily high temperature was 58°F and the daily low was 32°F, a diurnal range of 26°F. Season: Spring. Day 111 of 2002. 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: 0d751b76de09ce5d.

◈ GRAPH EDGES — 3 CONNECTIONSDETERMINISTIC · TIER 2

WEATHER_CROSS_STATION KBOI · 2002-04-21 · High: 64°F Low: 33°F · Elev: 860.5m · conf=0.91 · T2·DET

WEATHER_TEMPORAL_SERIES Boise Foothills · 2002-04-20 · High: 56°F Low: 30°F · conf=1.00 · T2·DET

WEATHER_TEMPORAL_SERIES Boise Foothills · 2002-04-22 · High: 62°F Low: 37°F · conf=1.00 · T2·DET

Boise Foothills — April 21, 2002FROST EVENT