Visual Crossing Weather API

weather.visualcrossing.com · Science

Science API Key Free Tier Weather Historical Weather Forecast

Current, forecast, and 65+ years of historical weather data — JSON and CSV output. Free tier: 1,000 records/day, commercial use permitted with attribution.

Authentication

API Key Free API key at visualcrossing.com. Pass as ?key= query parameter.

Sample Requests

GET Weather timeline

Get current weather and 15-day forecast for London.

https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/London?key=YOUR_KEY&include=current&unitGroup=metric&contentType=json

Hover any highlighted part to learn what it does

curl -X GET "https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/London?key=YOUR_KEY&include=current&unitGroup=metric&contentType=json"

import requests
params = {
    "key": "YOUR_KEY",
    "include": "current",
    "unitGroup": "metric",
    "contentType": "json"
}
response = requests.get(
    "https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/London",
    params=params,
)
print(response.json())

const url = new URL('https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/London');
url.searchParams.set('key', 'YOUR_KEY');
url.searchParams.set('include', 'current');
url.searchParams.set('unitGroup', 'metric');
url.searchParams.set('contentType', 'json');

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/London")
	q := baseURL.Query()
	q.Set("key", "YOUR_KEY")
	q.Set("include", "current")
	q.Set("unitGroup", "metric")
	q.Set("contentType", "json")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/London")
uri.query = URI.encode_www_form({
  "key" => "YOUR_KEY",
  "include" => "current",
  "unitGroup" => "metric",
  "contentType" => "json"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/London?" . http_build_query([
    "key" => "YOUR_KEY",
    "include" => "current",
    "unitGroup" => "metric",
    "contentType" => "json"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Historical weather

Get a week of historical weather data for New York.

https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/New York/2024-01-01/2024-01-07?key=YOUR_KEY&unitGroup=us&contentType=json

Hover any highlighted part to learn what it does

curl -X GET "https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/New York/2024-01-01/2024-01-07?key=YOUR_KEY&unitGroup=us&contentType=json"

import requests
params = {
    "key": "YOUR_KEY",
    "unitGroup": "us",
    "contentType": "json"
}
response = requests.get(
    "https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/New York/2024-01-01/2024-01-07",
    params=params,
)
print(response.json())

const url = new URL('https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/New York/2024-01-01/2024-01-07');
url.searchParams.set('key', 'YOUR_KEY');
url.searchParams.set('unitGroup', 'us');
url.searchParams.set('contentType', 'json');

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/New York/2024-01-01/2024-01-07")
	q := baseURL.Query()
	q.Set("key", "YOUR_KEY")
	q.Set("unitGroup", "us")
	q.Set("contentType", "json")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/New York/2024-01-01/2024-01-07")
uri.query = URI.encode_www_form({
  "key" => "YOUR_KEY",
  "unitGroup" => "us",
  "contentType" => "json"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline/New York/2024-01-01/2024-01-07?" . http_build_query([
    "key" => "YOUR_KEY",
    "unitGroup" => "us",
    "contentType" => "json"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗

Get a free API key at visualcrossing.com (1,000 records/day)
Pass key=YOUR_KEY on every request
Current + forecast: GET /timeline/{location}?key=KEY&contentType=json
Historical: GET /timeline/{location}/{startDate}/{endDate}?key=KEY&contentType=json
unitGroup: us (°F, mph), metric (°C, km/h), uk (°C, mph)

Open documentation ↗