Live weather data, right on Kalshi & Polymarket temperature markets. See the actual NWS/NOAA conditions — temperature, dewpoint, humidity, wind, and forecast — next to the market odds, without leaving the page.
⚠️ Pre-release beta. Not on the Chrome Web Store yet, so you install it manually. Takes about 2 minutes.
Grab the latest .zip from the Releases page →
- Unzip the downloaded file → you get a folder with
manifest.jsoninside.⚠️ Keep that folder somewhere safe (not Trash/Downloads) — Chrome runs it from there. - Open
chrome://extensions(Edge:edge://extensions) - Turn on Developer mode → top-right toggle
- Click Load unpacked → top-left
- Select the unzipped folder → ✅ done
- Open a daily temperature market on Kalshi or Polymarket (e.g. "Highest temperature in NYC today?")
- A panel appears under the trade box: live temp, humidity, wind, forecast, and a chart.
- On load, the chart does a shimmer → real data animation. Smooth? Any flicker or jump?
- Reload the page, and click between markets (especially on Polymarket).
Download the newest zip → unzip → chrome://extensions → click the ↻ reload icon on the card.
chrome://extensions → Remove.
It's a pre-release build, so it loads in "developer mode." It's a good habit to check any extension you install outside the Web Store — unzip it and ask Claude or ChatGPT:
"Read this Chrome extension's manifest.json and JS files — what permissions, websites, and data does it use, and does anything look unsafe?"
What you'll see: runs only on Kalshi & Polymarket, pulls public weather data, no login, no personal data. (Chrome may warn it can "read your browsing history" — that's just how it notices you switching between markets; it never touches other sites. The bundled code looks compressed/minified — that's normal for a release build.)
Found a bug? Open an issue or send a screenshot + the market URL. Thanks for testing! 🙏