Frequently asked questions

From numerical weather models brought together by Open-Meteo: the European ICON, the American GFS, and the ECMWF IFS, the global reference beyond five days. Open-Meteo picks the most reliable source for each town, at its exact coordinates and elevation. Alerts come from the official Meteoalarm feed, relayed in Luxembourg by MeteoLux.

Every weather site picks its own models, its own computing grid and its own reference elevation for the same town; a difference of a few hundred metres, or a few dozen metres of elevation, is enough to change a figure. We forecast at the exact position and elevation of each town, which explains the gap with a generic portal.

The first 48 hours are accurate to the degree. Between 3 and 7 days, read the trend rather than the exact figure. Beyond 7 days, up to 15, it remains a general direction — warmer, cooler, wetter — that the models will still revise from one day to the next; don't rely on it for a fine-grained decision.

It shows the share of the model's scenarios that predict rain at that place and time, not the amount expected: 70% means rain is likely, not that it will rain heavily. The amount in millimetres, shown right next to it, answers the question 'how much will fall?'.

Yes: they are the official alerts from the Meteoalarm feed, issued by MeteoLux, which we relay unchanged and without any edits. wetter-luxemburg.lu issues no warnings of its own and never replaces the authorities' safety instructions: in case of dangerous weather, always follow MeteoLux.

Forecasts are recalculated three times a day using the latest available models; the live block on every page refreshes every hour, and the 7-day and 15-day tables are rebuilt every night with the most recent data available at that time.

Like the weather forecasts, the pollen index comes from Open-Meteo, which models the dispersion of several pollen families (grasses, birch, ragweed…) using European data. It's only available where this service has coverage, mostly in Europe, and complements the air-quality index already shown on every page.

Write to us at contact@wetter-luxemburg.lu with its name and, if possible, its region or county: we usually add it within a few days. The site aims to cover in Luxembourg as thoroughly as possible, town by town, and the list keeps growing thanks to reports from readers.

No, wetter-luxemburg.lu requires no account and never identifies you by name. Only short technical logs at the host and aggregate audience statistics are used, together with advertising cookies that require your prior consent. The full detail is explained on our privacy page.

Through advertising, via Google AdSense, and nothing else: no subscription, no paid account, no reselling of data. Two discreet ad placements appear on every page, never above the main weather block, so the information stays the first thing you see.

No, and there isn't one planned: the site is built to work just as well on mobile as on a computer, with nothing to install. You can add it to your home screen from your browser to use it like an app, with no download and no updates to manage.

Each arrow shows the direction the wind is blowing from, and its colour the strength, from calm to very strong; the map updates with the latest available data. Click or tap a zone to see the wind detail at that exact spot.