Weather Lookup

📖 Tool Introduction

Open it and the weather for where you are comes up. Location works along two paths: it first tries browser geolocation for the device's real coordinates, which are accurate to metres, and only if you decline the permission prompt or the lookup times out does it fall back to an IP-based estimate. Even then, the city name from the IP lookup is fed back through geocoding to get that city's proper coordinates, so the rough latitude and longitude an IP database reports for a network exit is never what gets sent to the weather service.

Alongside current conditions, temperature, feels-like, humidity, wind speed and direction, pressure, visibility, cloud cover and a description, there is a ten-day forecast underneath with an icon and the high and low for each day. To look somewhere else, type a city name in the search box; suggestions appear as you type and picking one switches the view over.

Weather comes from a public forecast API, with no registration and no key needed. The last city and its result are cached locally, so reopening shows the previous data first and then refreshes instead of leaving you staring at a blank panel.

Location deserves a little more explanation. Browser geolocation uses whatever the device has available, WiFi and cell towers indoors and satellites outdoors, and is usually accurate to tens of metres, but it needs you to press allow once. If you decline or the device does not support it, the tool falls back to an IP-based estimate, which only resolves to a city. The result line states which method was used, so when you see IP-based you know what to expect.

The weather data itself comes from a public meteorological service. Observed or assimilated values like temperature, humidity and wind speed refresh several times an hour, while the ten-day outlook comes from numerical model output whose uncertainty grows the further out it goes. The next two or three days are reliable enough to plan around; anything beyond a week is only worth reading as a trend, not as a promise.

Wind speed and direction are the two values most often misread. Speed comes in kilometres per hour by default, and direction states where the wind blows from, so a north wind arrives from the north. Visibility is given in kilometres, with a low number indicating fog or haze. Pressure is the surface value, and a rapid drop over a short period usually signals a change in the weather.

✨ Key Features

• Browser geolocation takes priority, giving metre-level coordinates, with the method and accuracy shown on the result line
• When falling back to IP, coordinates come from geocoding the city name, so a network exit's coordinates are never mistaken for your location
• Nine current metrics: temperature, feels-like, humidity, wind speed, wind direction, pressure, visibility, cloud cover and conditions
• A ten-day forecast giving each day an icon plus its high and low, enough to plan ahead
• City search with live suggestions that start after two characters and handle Chinese city names directly
• The previous city and its data are cached locally, so reopening renders the old result before refreshing

🚀 How to Use

1. On open, wait for the location lookup to finish; the page shows a locating state and usually resolves within a second or two
2. If a permission prompt appears, allowing it gives you metre-accurate positioning
3. For another city, type its name in the search box and pick from the suggestion list
4. Read current conditions at the top and the ten-day highs and lows in the list below
5. Press the locate button to reposition; if locating fails, follow the prompt and search the city by hand

⚠️ Things to Note

• Accuracy depends on permission: Browser geolocation needs your consent and device support. Declining or a timeout drops you to IP-based location at city accuracy
• IP location is only an estimate: IP-derived location usually resolves to a city and can sit tens of kilometres from where you actually are. The result line says so explicitly
• A connection is needed: Weather comes from an online service. Offline it cannot refresh and only the last cached result is shown
• Forecasts drift over time: A ten-day outlook carries more uncertainty the further out it goes, so trust the first two or three days when planning something
• City names can collide: When several places share a name, check the country and region shown next to each suggestion before choosing