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from $0.03 / 1,000 index points

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Kalshi Weather Index, Station Obs & Settlement Audit

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Kalshi's minute temperature index for 13 cities, plus station observations (NWS, METAR), the NWS Daily Climate Report and a settlement-audit row per city-day for KXHIGH/KXLOW temperature markets. Public APIs, no login. Pay per row.

Pricing

from $0.03 / 1,000 index points

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Developer

Tit Slobodjanac

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Total users

Monthly active users

19 days ago

Last modified

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Mode

mode

Optional

index: Kalshi's minute temperature index (default, one row per minute per city). stations: NWS and METAR observations for the station each Kalshi temperature market names, plus one daily row per city-day with the NWS Daily Climate Report (CLI) max/min/precip. audit: one row per city-day joining the index high/low, CLI, METAR and the settled KXHIGH/KXLOW bracket with agree flags. calibrations: the station configuration Kalshi publishes behind each city's index (station ids, weights, offsets, effective date), one row per city per config version.

Type:string

Default:index

Options:

indexstationsauditcalibrations

Cities

cities

Optional

Kalshi city IDs. Leave empty for all. Index mode: the ten index cities plus nyc, chicago, la-coastal (empty = the original ten). Stations and audit modes: any city below, each mapped to the station its KXHIGH/KXLOW market cites (e.g. Chicago = Midway, CLIMDW).

Type:string[]

Extra stations (any ICAO code)

stations

Optional

Stations and audit modes only: METAR stations anywhere in the world by ICAO code, e.g. ZBAA (Beijing), EGLL (London Heathrow), LFPG (Paris), RJTT (Tokyo) — the stations Polymarket's global temperature markets resolve on. Observations, daily max/min and the METAR 24-hour group come from aviationweather.gov; no NWS climate report and no Kalshi join for these. Can be combined with Cities.

Type:array

Time zone for extra stations

stationTimezone

Optional

IANA zone (e.g. Asia/Shanghai) used to cut local days for the extra stations. Default: the solar offset from the station's longitude (Etc/GMT±h), which matches civil time to within an hour for most airports.

Type:string

Trailing window (days) – stations and audit modes

lastDays

Optional

How many complete local days ending yesterday, per city. 1–30. Ignored when From/To are set (dates, YYYY-MM-DD; To may be today). The NWS Daily Climate Report is kept about 7 days, METAR 30 days, the Kalshi index about 7–10 days; older days get null in those columns.

Type:integer

Minimum:1

Maximum:30

Default:1

Observation sources – stations mode

sources

Optional

Which observation rows to emit in stations mode. The daily row and audit mode always use METAR and the Daily Climate Report.

Type:string[]

Default:

[
  "nws",
  "metar"
]

Trailing window (hours) – index mode

lastHours

Optional

How many hours back from now to pull, per city. 1–168. Ignored when from/to are set. 60 points per hour per city.

Type:integer

Minimum:1

Maximum:168

Default:24

From (ISO time or unix ms)

from

Optional

Optional window start, e.g. 2026-09-01T00:00:00Z. Use with To.

Type:string

To (ISO time or unix ms)

Optional

Optional window end. Defaults to now.

Type:string

Per-station readings

detailed

Optional

Attach every member station's reading and quality-control disposition to each point (Kalshi's detailed=true). Larger rows, same price.

Type:boolean

Default:false

Maximum points

maxItems

Optional

Cost cap per run: index points in index mode, rows in stations and audit modes. 1,000 points = one city for about 17 hours.

Type:integer

Minimum:1

Maximum:500000

Default:20000

Archive dataset name

archiveDatasetName

Optional

Also append points to a named dataset in your account (e.g. kalshi-weather-index). Schedule hourly and you keep a history Kalshi only serves as a window.

Type:string

Compact rows (one per city per hour)

compact

Optional

Group the minutes of each hour into one row per city with a minutes array plus min/max. 60× fewer dataset rows, same data, same price (per index point). Good for archiving.

Type:boolean

Default:false

Archive only

archiveOnly

Optional

With an archive dataset set: write only to the archive, not to this run's dataset. Halves storage writes on scheduled runs.

Type:boolean

Default:false

Align window to full hours

alignToHour

Optional

End the window at the last completed hour instead of now. With lastHours 1 on a schedule at minute 10, each run covers exactly the previous hour.

Type:boolean

Default:false

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