Why the national service instead of a big weather app?

Because it is the primary source. LHMT is the body that actually issues forecasts for Lithuania, publishes them openly with no key, and does not reformat or resell somebody else's model output.

What is felt temperature?

It combines air temperature with wind and humidity to estimate what the body experiences. It diverges most from the air reading in cold wind, which is exactly when the difference matters.

Yes. It comes from api.meteo.lt, the open forecast API of the Lithuanian hydrometeorological service. Nothing is invented or simulated, and if the source cannot be reached the saver reports that instead of drawing something plausible.

Does it cost anything or need an account?

No. Every screensaver here is free, runs in the browser and needs no sign-up. This one uses a public API that requires no key.

How is felt temperature calculated?

It adjusts the air temperature for factors such as wind, and in some formulas humidity. Several formulas exist, so the number is an estimate and differs between providers.

Do the values come from measurements?

They are forecasts produced by weather models, not readings from a thermometer. Observed conditions can differ from what was predicted.

Is the weather in Vilnius typical for Lithuania?

Broadly. The coast is moderated by the Baltic Sea and tends to be milder in winter and cooler in summer than inland Vilnius.

Vilnius Forecast Screensaver

The Vilnius Forecast screensaver draws temperature, felt temperature, wind and precipitation for Vilnius from LHMT, the Lithuanian hydrometeorological service, rather than from a commercial aggregator. The solid line is air temperature, the dashed line is what it feels like, and the bars underneath are rainfall. It runs in the browser with nothing to install; press ESC to exit.

How the Vilnius Forecast screensaver works

The saver reads api.meteo.lt, the open forecast API of the Lithuanian hydrometeorological service.

No account and no key: the request goes straight from your browser, or from this site's own refreshed copy of the feed where the source does not allow browser access.

Values are drawn on a canvas that resizes with the window, so it works on a laptop or a wall display.

If the source is unreachable the saver says so on screen rather than showing stale numbers as though they were current.

Weather from LHMT, the Lithuanian met service

The Lithuanian Hydrometeorological Service, abbreviated LHMT, is the national weather and hydrology service, and it runs the open Meteo LT API at api.meteo.lt. Its data is published under a Creative Commons Attribution-ShareAlike 4.0 licence, with attribution to the service required, which is why the saver credits LHMT as the source rather than a commercial aggregator.

Vilnius lies inland and has a continental-leaning climate, with cold winters and warm summers. The API’s place forecasts include air temperature in degrees Celsius, a feels-like temperature, wind speed, gusts and direction, cloud cover as a percentage, precipitation in millimetres and a condition code. The time step is not fixed: precipitation sums cover one hour or three, depending on the step. Feels-like temperature adjusts air temperature to estimate how the weather feels to a person, and different formulas exist, so it is a guide rather than a measurement.

Forecasts get less reliable the further ahead they look, and the first day or two are the most trustworthy. The values are model predictions for the location, not measurements, and local conditions in a city can differ from them. The display is informational and is no substitute for official warnings in severe weather, which the national service issues separately.

A worked example

The temperature line runs across the next day or so with the hour labelled beneath every few points. A dashed grey line tracks alongside it: in summer the two nearly overlap, but on a windy winter afternoon the dashed line sits several degrees lower — that gap is wind chill. Blue bars along the bottom mark the hours with precipitation in the forecast.

Settings & tips

Accent and Background recolour the display without changing the data.
Add it to a Multi-view grid to watch it alongside other live savers.
Press ESC at any time to leave fullscreen.

Frequently asked questions

Why the national service instead of a big weather app?: Because it is the primary source. LHMT is the body that actually issues forecasts for Lithuania, publishes them openly with no key, and does not reformat or resell somebody else's model output.
What is felt temperature?: It combines air temperature with wind and humidity to estimate what the body experiences. It diverges most from the air reading in cold wind, which is exactly when the difference matters.
Is this real data?: Yes. It comes from api.meteo.lt, the open forecast API of the Lithuanian hydrometeorological service. Nothing is invented or simulated, and if the source cannot be reached the saver reports that instead of drawing something plausible.
Does it cost anything or need an account?: No. Every screensaver here is free, runs in the browser and needs no sign-up. This one uses a public API that requires no key.
How is felt temperature calculated?: It adjusts the air temperature for factors such as wind, and in some formulas humidity. Several formulas exist, so the number is an estimate and differs between providers.
Do the values come from measurements?: They are forecasts produced by weather models, not readings from a thermometer. Observed conditions can differ from what was predicted.
Is the weather in Vilnius typical for Lithuania?: Broadly. The coast is moderated by the Baltic Sea and tends to be milder in winter and cooler in summer than inland Vilnius.

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