NWS Forecast Highs at Kalshi Weather-Market Locations

This Actor returns the U.S. National Weather Service (NWS) daytime forecast high for each location named in Kalshi's daily-high temperature market rules, with the time NWS issued the forecast.

What each row is

• The NWS gridpoint forecast for the 12-hour daytime period (6 am to 6 pm local time) on the target date. It covers the 2.5 km forecast grid cell that contains the NWS station at that location. The value is a whole degree Fahrenheit, exactly as NWS issued it.
• It is not a station observation, a station-specific prediction, or a settlement value. The markets settle on The Weather Company's reported maximum temperature, as their rules state. That value can differ from any NWS forecast by several degrees, and the market "day" and the forecast period are not the same time window.
• How each location is identified: the market rules name a location code, for example "New York City (CLINYC)". The NWS climate report for that code names the site, for example Central Park. The NWS station record for that site gives the coordinates the forecast uses.

Series	Rules code	NWS site	Station
KXHIGHNY	CLINYC	Central Park, NY	KNYC
KXHIGHPHIL	CLIPHL	Philadelphia International Airport	KPHL
KXHIGHMIA	CLIMIA	Miami International Airport	KMIA
KXHIGHCHI	CLIMDW	Chicago Midway Airport	KMDW
KXHIGHAUS	CLIAUS	Austin-Bergstrom International Airport	KAUS
KXHIGHDEN	CLIDEN	Denver International Airport	KDEN
KXHIGHLAX	CLILAX	Los Angeles International Airport	KLAX

Always check the current market rules: a market can change its location or settlement source.

Fields

series, market_rules_location_code, nws_climate_site, nws_station, target_date_local, forecast_high_f, forecast_kind, period_name, period_start, period_end, short_forecast, nws_forecast_generated_at (when NWS generated the forecast), nws_grid_updated_at (when the underlying grid data was last updated), nws_grid, source, settlement_note, retrieved_at.

Input

• series: tickers to include. Leave empty for all seven.
• days: 1 to 7 days, starting today in each location's local time.

NWS drops the "Today" period late in the local afternoon, so an evening run starts with tomorrow.

Pricing

$0.002 per row delivered (one location, one day). All seven locations for two days is 14 rows, which costs $0.028. Nothing is charged for a location whose NWS read fails.

Example row

{"series": "KXHIGHNY", "market_rules_location_code": "CLINYC", "nws_climate_site": "Central Park, NY", "nws_station": "KNYC",
 "target_date_local": "2026-10-14", "forecast_high_f": 80,
 "forecast_kind": "NWS gridpoint 12-hour daytime period high (integer F, as issued)",
 "period_start": "2026-10-14T06:00:00-04:00", "period_end": "2026-10-14T18:00:00-04:00",
 "nws_forecast_generated_at": "2026-10-13T10:25:17+00:00", "nws_grid_updated_at": "2026-10-13T06:02:10+00:00", "nws_grid": "OKX/34,45",
 "source": "U.S. National Weather Service, api.weather.gov (public domain)"}

Source and limitations

Data comes from the U.S. National Weather Service (api.weather.gov), a U.S. government work in the public domain. Forecasts are passed through as issued and can be wrong.

This Actor is not affiliated with or endorsed by NWS, NOAA, Kalshi or The Weather Company. It gives no trading advice and makes no performance claims. Kalshi is named only to identify which locations are covered.

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