Frequently asked questions
Is ExactSky Weather free to use?+
Yes. Every forecast, the 15-day outlook, and live radar are free with no paywall or sign-in required. The Service is sustained by non-intrusive advertising, not by selling user data.
Where does your weather data come from?+
Live forecasts, current conditions, and hourly data come from Open-Meteo's commercial API (1 km-resolution models), used under a CC BY 4.0 licence. Air quality comes from Open-Meteo's Air Quality API. Historical averages and "normal" comparisons come from NASA POWER.
How often is the forecast updated?+
Live conditions and forecasts refresh roughly every 15 minutes. Air quality refreshes every 30 minutes. You may briefly see a cached value between refreshes — this keeps the site fast without re-fetching identical data on every visit.
How accurate is the "vs normal" comparison shown on city pages?+
It compares today's forecast high against the actual 1991–2020 monthly average for that location, computed from NASA POWER's real daily historical data — not a single reference year. The recent-days chart uses NASA POWER's actual published daily highs, which typically lag 2-7 days behind today.
Do you have a mobile app?+
Not yet — Android and iOS apps are in development. The website is fully usable on mobile in the meantime.
Is my location tracked or sold to advertisers?+
No. Location is only used to show you relevant weather (via your browser's own permission prompt, or a city you search for) and isn't sold or shared for advertising profiles. See our Privacy Policy for details.
I found an incorrect forecast or a bug — how do I report it?+
Email support@exactskyweather.com with the city, tab, and what looked wrong — screenshots help. We investigate every report; see the Contact page for other inquiry types.
How can I advertise on ExactSky Weather?+
Email advertising@exactskyweather.com — see the Contact page for details.
Don't see your question? Contact us.