Polymarket weather resolution stations, city by city
The exact airport/ASOS station Polymarket and Kalshi temperature markets resolve on — including the non-obvious ones that quietly lose trades. A free reference for weather-market traders.
Every temperature market resolves against one specific weather station — not the city, and rarely the airport you’d guess. Reading the market off a city-center weather app is the single most common way traders lose money in these markets, because the resolving gauge can sit several degrees off the number on your screen. This page is a working reference to the stations that matter, and how to confirm the rest.
The non-obvious stations (memorise these)
These are the mappings that bite. In each case, the market resolves on a station that is not the city’s biggest or most obvious airport:
| City | Station | ICAO | Watch out |
|---|---|---|---|
| New York | LaGuardia | KLGA | Not JFK, not Central Park. Runs 3–5°F cooler than midtown. |
| Dallas | Love Field | KDAL | Not DFW International. |
| Houston | Hobby | KHOU | Not Bush/IAH. |
| Denver | Buckley SFB | KBKF | Not Denver International (KDEN). |
| Paris | Le Bourget | LFPB | Not Charles de Gaulle or Orly. |
| Moscow | Vnukovo | UUWW | Not Sheremetyevo (UUEE). |
| Istanbul | Istanbul Airport | LTFM | Not Sabiha Gökçen (LTFJ). |
| Milan | Malpensa | LIMC | Not Linate (LIML). |
How to confirm any other city
For cities not in the table, follow three rules:
- Read the market’s resolution text. Both platforms name their source and station (or the page they read it from). That text is authoritative — not this page, not your weather app.
- Assume the airport ASOS, then verify. Most cities resolve on the primary international airport’s automated station — but “primary” is exactly the assumption that fails for the cities above, so confirm it.
- Expect the gauge to differ by platform — and sometimes by series. The same city can resolve on different stations on Polymarket vs Kalshi, and a few cities (London, Tokyo, Shanghai, Seoul) have used different gauges across different market series.
Polymarket vs Kalshi: different sources entirely
It isn’t just the station — it’s the data feed. Kalshi settles on the next-day NWS Climate Report (CLI) for an official NWS station (New York, for example, is Central Park / KNYC), read in Local Standard Time. Polymarket (and Robinhood and IBKR) settle on Weather Underground from the local midnight-to-midnight window. The same day, same city, can settle 1°F apart — enough to flip a contract. We break this down in Kalshi vs Polymarket weather.
Stop checking by hand
Temprr pins every market to its verified settlement station and routes the observations, the forecast and the bucket probabilities through that exact gauge — across ~51 cities, including the international ones every other tool gets wrong. The #1 silent edge-killer, designed out by default.
Reference only — always confirm against the market’s official resolution text before trading. Station mappings can change.