Data

Every file the site uses, and where it came from. Generated 2026-08-26 18:58 UTC from GHCN-Daily 3.34-upd-2026082518.

Site data (JSON)

index.json — all stations, headline numbers, baseline and thresholds.

Station	NOAA id	Record	Yearly & monthly	Every day	NOAA source file
Pasadena	`USC00046719`	1893–2026-07-29	summary.json	daily.json	USC00046719.csv.gz
Santa Ana	`USC00047888`	1916–2026-07-31	summary.json	daily.json	USC00047888.csv.gz
Newport Beach	`USC00046175`	1921–2026-07-31	summary.json	daily.json	USC00046175.csv.gz
Palmdale	`USC00046624`	1931–2026-07-31	summary.json	daily.json	USC00046624.csv.gz
Torrance Airport	`USW00003122`	1932–2026-08-23	summary.json	daily.json	USW00003122.csv.gz
UCLA	`USC00049152`	1933–2026-08-23	summary.json	daily.json	USC00049152.csv.gz
Culver City	`USC00042214`	1935–2026-08-23	summary.json	daily.json	USC00042214.csv.gz
Burbank	`USC00041194`	1939–2026-08-23	summary.json	daily.json	USC00041194.csv.gz
LAX	`USW00023174`	1944–2026-08-23	summary.json	daily.json	USW00023174.csv.gz
Mt. Wilson	`USC00046006`	1948–2026-07-31	summary.json	daily.json	USC00046006.csv.gz
Long Beach Airport	`USW00023129`	1949–2026-08-23	summary.json	daily.json	USW00023129.csv.gz
Woodland Hills	`USC00049785`	1949–2026-08-21	summary.json	daily.json	USC00049785.csv.gz
Palmdale Airport	`USW00023182`	1934–2026-08-23	summary.json	daily.json	USW00023182.csv.gz
Lake Elsinore	`USC00042805`	1897–2026-07-31	summary.json	daily.json	USC00042805.csv.gz
Pomona Fairplex	`USC00047050`	1893–2012-09-30	summary.json	daily.json	USC00047050.csv.gz
Claremont	`USC00041779`	1893–1980-12-31	summary.json	daily.json	USC00041779.csv.gz
Riverside	`USC00047470`	1893–2016-11-21	summary.json	daily.json	USC00047470.csv.gz
Riverside Citrus Station	`USC00047473`	1956–2009-09-30	summary.json	daily.json	USC00047473.csv.gz
Corona	`USC00042031`	1913–1988-07-31	summary.json	daily.json	USC00042031.csv.gz
Tustin Irvine Ranch	`USC00049087`	1915–2003-06-30	summary.json	daily.json	USC00049087.csv.gz
Yorba Linda	`USC00049847`	1912–2007-06-30	summary.json	daily.json	USC00049847.csv.gz
San Gabriel	`USC00047785`	1939–2015-03-31	summary.json	daily.json	USC00047785.csv.gz
Laguna Beach	`USC00044647`	1928–2008-07-17	summary.json	daily.json	USC00044647.csv.gz
Santa Monica Pier	`USC00047953`	1937–2010-02-28	summary.json	daily.json	USC00047953.csv.gz
San Fernando	`USC00047759`	1918–1974-03-19	summary.json	daily.json	USC00047759.csv.gz
El Toro MCAS	`USW00093101`	1945–1998-12-10	summary.json	daily.json	USW00093101.csv.gz

Temperatures in the JSON are NOAA's native tenths of °C (daily.json) or °C (summaries); threshold keys are whole °F. daily.json index i is start + i days; null means no valid observation; flagged lists withheld values with their NOAA quality flag.

National set

us/index.json — every US station with a 50+ year record (columns listed in the file), and matrix-warm70.bin, matrix-hot95.bin, matrix-frost32.bin — int16 station × year matrices (row order = index order, columns from matrix.year0; −1 = no data, values below −1 encode a lower bound as −(n+2)). Each station also has its own stations/<ID>/summary.json and daily.json at the same paths as above.

Upstream

NOAA GHCN-Daily archive — readme, station list, inventory.
Menne, M.J., I. Durre, R.S. Vose, B.E. Gleason, and T.G. Houston, 2012: An overview of the Global Historical Climatology Network-Daily Database. J. Atmos. Oceanic Technol., 29, 897–910.
NWS Technical Memorandum TM-261 — the history of Los Angeles weather observations (why downtown is excluded).
Pipeline, checksums (manifests/) and the data-quality report: github.com/ssorkin/climate.