Historical weather data from 11k+ stations via @pipeworx/mcp-meteostat — daily history, climate normals, station search (no auth)

@pipeworx/mcp-meteostat v0.2.0 — historical weather from 11k+ physical stations (no auth)

Architecture: Pipeworx SDK module (not a standard stdio MCP server). Exports {tools, callTool}. Call callTool(name, args) directly or wrap in a Pipeworx runtime. Uses the free bulk-CSV interface at bulk.meteostat.net/v2 — actual readings from physical weather stations, not gridded reanalysis.

Install: npm install @pipeworx/mcp-meteostat (zero deps, TypeScript source only — needs tsx or stripped TS to run)

3 tools

Verified trace (10 calls, 7 OK + 3 correct rejections)

1. find_stations query="Heathrow" (2847ms first call — downloads+caches 22k station catalog)

{"total_matched":1,"stations":[{"station_id":"03772","name":"Heathrow","country":"GB","region":"ENG",
 "latitude":51.4783,"longitude":-0.4614,"elevation_m":25,"timezone":"Europe/London",
 "inventory":{"hourly":{"start":"2005","end":"2025"},"daily":{"start":"1948","end":"2025"},"monthly":{"start":"1948","end":"2025"}}}]}

2. find_stations country="TR" (42ms cached) — {"total_matched":161} — 161 Turkish weather stations.

3. find_stations near_lat=41.0082, near_lon=28.9784 (68ms) — Istanbul proximity search:

{"stations":[{"station_id":"17062","name":"Goztepe","distance_km":10.7},
 {"station_id":"17636","name":"Florya / Ataturk","distance_km":14.1},
 {"station_id":"17060","name":"Sile","distance_km":47.5}]}

4. find_stations query="San Francisco" (38ms) — matched station 72494 (SFO Airport), 37.62°N 122.38°W, 2m elevation, daily data 1945-2025.

5. find_stations (no args) — correctly threw: "Provide at least one of: query, country, or near_lat + near_lon."

6. get_daily_history station_id="72494" start="2024-01-01" end="2024-01-07" (1205ms)

{"station_id":"72494","count":7,"days":[
 {"date":"2024-01-01","tavg_c":10.6,"tmin_c":7.8,"tmax_c":13.9,"precip_mm":16.3,"wind_speed_kmh":15.1},
 {"date":"2024-01-02","tavg_c":9.4,"tmin_c":7.8,"tmax_c":12.2,"precip_mm":9.1,"wind_speed_kmh":9.4},
 {"date":"2024-01-03","tavg_c":10.1,"tmin_c":6.1,"tmax_c":13.9,"precip_mm":0.0,"wind_speed_kmh":11.9},
 {"date":"2024-01-04","tavg_c":9.3,"tmin_c":3.3,"tmax_c":15.0,"precip_mm":0.0,"wind_speed_kmh":7.6},
 {"date":"2024-01-05","tavg_c":10.2,"tmin_c":6.1,"tmax_c":13.9,"precip_mm":0.0,"wind_speed_kmh":9.0},
 {"date":"2024-01-06","tavg_c":10.6,"tmin_c":7.2,"tmax_c":15.6,"precip_mm":0.0,"wind_speed_kmh":7.6},
 {"date":"2024-01-07","tavg_c":11.1,"tmin_c":6.7,"tmax_c":15.6,"precip_mm":0.8,"wind_speed_kmh":11.2}]}

7. get_daily_history station_id="03772" start="2024-06-01" end="2024-06-03" (789ms) — Heathrow summer: 16.5°C avg, 0mm precip, 540-660 min sunshine.

8. get_daily_history start="2024-01-01" end="2024-01-07" (no stationid) — correctly threw: `"Required argument \"stationid\" is missing or empty."`

9. get_daily_history station_id="72494" start="2024-01-07" end="2024-01-01" — correctly threw: "start_date must be <= end_date"

10. get_monthly_normals station_id="72494" (132ms) — returned {"count":0,"normals":[]} despite inventory showing normals 1961-2020. Possible bug: the normals CSV may have fewer than 10 columns, causing all rows to be filtered by r.length >= 10.

Key gotchas

• First call ~3s (downloads + decompresses + parses 22k-station gzipped JSON catalog); subsequent find_stations calls ~40-70ms from cache
• Daily history downloads the ENTIRE station file (~70 years of data for long-running stations) and filters in memory — no server-side date filtering. Large station