Add Today's Weather to Obsidian with Templater (Free API)

Why this workflow is useful

I wanted a fast way to stamp today’s weather into my daily note without opening another app.

This script gives me:

• current condition
• temperature context
• high and low for the day
• a friendly icon in the note

The service behind it: wttr.in

This setup uses wttr.in, a free weather service with a simple URL interface.

• No API key is required for basic usage.
• It supports JSON output via ?format=j1.
• If I provide a location in the URL, it fetches weather for that location.
• If I do not provide a location, wttr.in infers location from my IP address.

That means I can use one script for travel or local use:

• pass a city when I want precision
• omit location when I want current local weather

Original script (fixed location)

My original script calls:

https://wttr.in/Granada?format=j1

This is good when I always want Granada weather.

Improved script: optional location with IP fallback

I use this Templater script to prompt for a location. If blank, it falls back to IP-based lookup.

I escaped the Templater delimiters so this example does not execute inside this note. Remove the backslashes when copying into your real template.

\<%*
const locationInput = await tp.system.prompt(
  "Weather location (city/zip). Leave empty for current IP location:",
  ""
);
 
const location = (locationInput || "").trim();
const endpoint = location
  ? `https://wttr.in/${encodeURIComponent(location)}?format=j1`
  : "https://wttr.in/?format=j1";
 
let weatherData = {
  nearest_area: [{ areaName: [{ value: "Unknown Location" }] }],
  current_condition: [{
    temp_F: "??",
    FeelsLikeF: "??",
    weatherCode: "Unknown",
    weatherDesc: [{ value: "Unknown" }]
  }],
  weather: [{ maxtempF: "??", mintempF: "??" }]
};
 
try {
  const res = await fetch(endpoint);
  weatherData = await res.json();
} catch (err) {
  console.error("Weather fetch failed:", err);
}
 
const current = weatherData.current_condition[0];
const area = weatherData.nearest_area[0].areaName[0].value;
const description = current.weatherDesc[0].value;
const high = weatherData.weather[0].maxtempF;
const low = weatherData.weather[0].mintempF;
 
const WWO_CODE = {
  113: "Sunny", 116: "PartlyCloudy", 119: "Cloudy", 122: "VeryCloudy", 143: "Fog",
  176: "LightShowers", 200: "ThunderyShowers", 227: "LightSnow", 230: "HeavySnow",
  296: "LightRain", 302: "HeavyRain", 311: "LightSleet", 353: "LightShowers"
};
 
const WEATHER_SYMBOL = {
  Unknown: "✨", Cloudy: "☁️", Fog: "🌫", HeavyRain: "🌧",
  HeavySnow: "❄️", LightRain: "🌦", PartlyCloudy: "⛅️", Sunny: "☀️", VeryCloudy: "☁️"
};
 
const weatherLookupName = WWO_CODE[current.weatherCode] || "Unknown";
const weatherIcon = WEATHER_SYMBOL[weatherLookupName] || WEATHER_SYMBOL.Unknown;
 
tR += `### ${weatherIcon} Weather in ${area}\n`;
tR += `> **${description}**\n`;
tR += `> High: ${high}°F • Low: ${low}°F\n`;
%\>

How this runs in my workflow

I keep this script inside my daily note template.

Templater runs it automatically every time a new daily note is created, so I do not run the weather template manually.

Caveats I keep in mind

• IP-based location may resolve to a nearby city, not my exact block.
• If the service is unavailable, fallback values (??) appear instead of breaking the note.
• If I prefer Celsius, I switch temp_F, FeelsLikeF, maxtempF, and mintempF to metric fields.
• If I create a daily note for a date other than today, this script still fetches current weather, not weather for that note date.
• I originally found this script pattern online and do not remember the source; if I find it again, I will add attribution.

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