—°F Boise, ID
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Weather Intelligence · Valley Floor · boise-standard-weather-v1.0.0

KBOI — April 21, 1990

WEATHER RECORD · KBOI · 1990-04-21 · boise-standard-weather-v1.0.0
HI 64°F · LO 47°F · RNG 17°F · 6 edges
64°F Daily High (TMAX)
47°F Daily Low (TMIN)
17°F Temp Range · Spring
6 Graph Edges
◈ PRIMARY SOURCE RECORD · TIER 1 · NOAA GHCND · LAW I 8afaa459b06e39b9
STATION Boise Air Terminal (KBOI)
GHCND ID USW00024131
DATE 1990-04-21 · Spring · Day 111 of 1990
TMAX 64°F
TMIN 47°F
TRANGE 17°F
ZONE valley_floor
COUNTY ada
ELEVATION 860.5m · Valley Floor
COORDINATES 43.56705°N, -116.24062°W
SOURCE TIER TIER 1 — PRIMARY FEDERAL SOURCE — NOAA GHCND
CONFIDENCE 0.95
◈ DUAL PROVENANCE STAMP — INTERNAL NODE + EXTERNAL SOURCE LAW I · LAW II
SOURCE ORG NOAA National Centers for Environmental Information — GHCND
RECORD ID 8afaa459b06e39b9
INGESTED 2026-07-14T16:30:44 UTC
PIPELINE boise-standard-weather-v1.0.0
CONTENT HASH 7366f7275b4f70a1
◈ STATION CONTEXT — KBOI MICROCLIMATE · VALLEY FLOOR
STATION DESC The primary NWS observation station for the Treasure Valley. Boise Airport (KBOI) has recorded daily temperature since 1940, making it the longest continuous climate record in the region. Sits at 860 meters on the valley floor.
RECORD SINCE 1940 — 1990 is year 51 of record
◈ ATOMIC ANSWER — WHAT AI READS ABOUT THIS RECORD

On 1990-04-21 at Boise Air Terminal (KBOI) (Valley Floor, ada, 860.5m elevation), the daily high temperature was 64°F and the daily low was 47°F, a diurnal range of 17°F. Season: Spring. Day 111 of 1990. 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: 8afaa459b06e39b9.

◈ GRAPH EDGES — 6 CONNECTIONSDETERMINISTIC · TIER 2
WEATHER_CROSS_STATION Boise Foothills · 1990-04-21 · High: 59°F Low: 44°F · Elev: 1184.1m · conf=0.91 · T2·DET
WEATHER_CROSS_STATION Parma · 1990-04-21 · High: 72°F Low: 49°F · Elev: 698.0m · conf=0.83 · T2·DET
WEATHER_CROSS_STATION Deer Flat · 1990-04-21 · High: 70°F Low: 47°F · Elev: 765.0m · conf=0.80 · T2·DET
WEATHER_CROSS_STATION Homedale · 1990-04-21 · High: 73°F Low: 49°F · Elev: 679.7m · conf=0.84 · T2·DET
WEATHER_TEMPORAL_SERIES KBOI · 1990-04-20 · High: 73°F Low: 48°F · conf=1.00 · T2·DET
WEATHER_TEMPORAL_SERIES KBOI · 1990-04-22 · High: 62°F Low: 51°F · conf=1.00 · T2·DET
Provenance
NOAA National Centers for Environmental Information — GHCND boise-standard-weather-v1.0.0 8afaa459b06e39b9 /treasure-valley/data/weather/kboi/1990/04/21/ 7366f7275b4f70a1