↖ CPA Weather Lab
CoCoRaHS Export Bench
Bulk pulls from data.cocorahs.org · one file, nothing to install
1

Where

—
States / provinces — pick as many as you want
No state selected. The endpoint answers that with the entire national file — about 2.5 MB and 17,900 rows per day requested. Pick at least one state unless you want the whole network.
Canada and the Bahamas can't be filtered at the source. Each chunk arrives as the full national file, roughly 2.5 MB per day of range. Download them, then drop them into step 5 — the merge step keeps only the stations you picked.
2

What

each type is its own file
Report types
Each type is a separate export with its own columns. Hail and SigWx are sparse — a month of PA is usually a handful of rows.
3

Options

defaults are fine
4

Download

—
The bench fetches every planned export one at a time, then bundles them into one ZIP. Your browser receives a single download, so Chrome does not get to veto file #2 through file #73. The files inside keep descriptive names such as cocorahs_Daily_PA_2025-07-01_2025-07-31.csv.
5

Merge

optional
Drop your downloaded CSVs here
Or click to pick them. Everything stays in this tab — nothing is uploaded.
Duplicate rows across chunk seams are removed automatically.
Filtering to your selection. The national files you downloaded will be trimmed to just those stations as they're read.
Endpoint: data.cocorahs.org/cocorahs/export/exportreports.aspx — the same one the official Data Export page builds, called directly.
Note: these are raw observer reports, not the quality-controlled values that reach GHCN-Daily months later. Trace shows as T, missing as NA.
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