Privacy.

last updated 2026-07-18

What this site collects about you

• No analytics, no trackers, no ads. There is no measurement of you on this site. We measure barometric pressure instead; it complains less.
• One cookie, and only if you sign in. Administrators get a session cookie so the server remembers they're administrators. Visitors get no cookies at all.
• One localStorage key remembers your light/dark theme choice, on your device, for your benefit. It never leaves your browser.
• Ordinary server logs. Like every web server since the Clinton administration, ours notes requests (IP, path, time) in logs that rotate away on their own. We read them when something breaks, which is the only time anyone reads logs.

What your browser tells other people

The map is made of tiles your browser fetches directly from third parties: OpenStreetMap/CARTO (base maps), OpenTopoMap (terrain), Esri (satellite imagery, only when you switch it on), and RainViewer (rain radar, only when you switch it on). Each sees your IP address when your browser asks them for tiles — the same as visiting any website. Their privacy policies are their own. The fonts arrive from Google Fonts under the same arrangement.

What a weather report shares

If you press "report the sky", the report carries: what you saw, your location at that moment, and an optional note. On the public map and feeds your location is rounded to roughly 100 metres — enough to place the weather, not your front door. Anonymous reports are attributed to no one; if you're signed in, your username rides along. To keep one person from reporting a monsoon single-handedly, the server rate-limits by a salted hash of your IP and browser — the hash is stored, the IP and browser string are not. Reports you don't send share nothing, and the button works fine if you never touch it.

What this site collects about the weather

Everything it can. Temperature, wind, rain, pressure, particulates, lightning — the stations report it, the server keeps it, and it's all public through the API, downloadable by anyone. The weather has waived its right to privacy by being conducted entirely in public.

Questions

The whole system is open source — the fastest way to verify any claim on this page is to read the code that would have to be doing the tracking, and observe that it isn't there.