Current conditions and a 7-day outlook

Search for a city to see its conditions and seven-day outlook. The selection is saved in this browser. Forecast dates follow the selected city's time zone, shown above the daily list, so its “Today” may differ from yours when you are far away.

Temperatures are in Celsius, wind speed in kilometres per hour, humidity in percent and precipitation in millimetres. Each daily row gives the forecast high and low. For example, a 20° high and 11° low describe a range across the day, not the temperature at the moment you open the page.

“Feels like” estimates the combined effect of conditions on perceived temperature. The precipitation figure is an amount, not a percentage chance of rain, and a daily weather icon summarises the day rather than promising the same weather every hour. Compare the daily rows before choosing a day for an outdoor activity; the seven-day total alone will not tell you which afternoon is likely to be wet.

Weather data is provided by Open-Meteo under CC BY 4.0. Its model-based estimates can differ from a nearby weather station or conditions on your street. See the forecast documentation for definitions. ChronoClock rounds displayed values and summarises the daily data.

Your browser never talks to the forecast service directly. It asks ChronoClock for a city by name, ChronoClock looks up that city's coordinates in its own list, requests the forecast for that point from Open-Meteo and passes the answer back. Nothing about your device or your location travels with the request, and the only thing kept between visits is which city you last looked at, stored in this browser.

Six values make up the current panel: air temperature two metres above the ground, the apparent temperature for the same moment, relative humidity, wind speed ten metres up, a numeric weather code that becomes the written description, and a day-or-night flag that sets the label beside the heading. The daily list adds a code, a high, a low and a precipitation total for each of seven days, all of them dated in the selected city's zone.

Answers are cached for fifteen minutes, and for up to an hour beyond that an older copy can be served while a fresh one is fetched in the background. Reloading within that window is therefore likely to show the same numbers again, which is normal rather than a fault.

Take a row that reads Thursday, rain showers, 4.2 mm, 19° and 12°. The 19 and the 12 are the warmest and coldest points expected anywhere in that day, usually mid-afternoon and shortly before dawn, so neither is what the thermometer will read when you step outside at lunchtime. The 4.2 mm is a depth: the total water expected to fall across the whole day. Spread evenly it is a damp afternoon you would walk through; arriving in twenty minutes it is a downpour. A daily total cannot distinguish the two, which is the main limitation of a seven-day view.

The written summary describes the day as one thing, and days rarely are. A morning of clear sky followed by one thunderstorm at five o'clock is still labelled as a thunderstorm, because the code picks the most significant weather of the day. A row with no millimetre figure beside it is a day with no precipitation forecast at all.

The three totals under the list are there for comparing a week rather than a day. The warmest day ahead and the coldest night ahead are taken from the highs and lows of the same seven rows, and the precipitation total adds those rows together. They are a quick way to see whether a week is wetter or milder than the one before it, and no substitute for reading the individual days when you are choosing an afternoon.

The picker covers a fixed list of 182 cities in 68 countries. There is no search by postcode, no entry of your own coordinates and no request for your device's location, so if your town is not listed the nearest listed city is the closest you can get. Each city is represented by a single point near its centre, which matters in a large metropolitan area or wherever the coast, a valley or a few hundred metres of altitude change the weather within the city itself.

Everything here is model output rather than a reading from an instrument near you, and the further into the week a row sits, the wider its real margin of error. There is no hourly breakdown, no radar, no pollen or air-quality figure, and no official warning feed. When a storm, a flood or a heat alert is the thing you actually need, your national weather service issues those and this page does not carry them.