score:17

Accepted answer

It is indeed possible.

Considering you have imported your font (from GoogleFonts for instance),
you just have to edit the defaultFontFamily attribute in your chart options like this :

var options = {
    // 'Raleway' is the name of the fond I imported from GoogleFonts
    defaultFontFamily: Chart.defaults.global.defaultFontFamily = "'Raleway'"
}

See Lolka's answer for more information about the defaultFontFamily attribute.

A full working example:

Chart.defaults.global.defaultFontFamily = "Indie Flower";
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
    type: 'bar',
    data: {
        labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
        datasets: [{
            label: '# of Votes',
            data: [12, 19, 3, 5, 2, 3],
            backgroundColor: [
                'rgba(255, 99, 132, 0.2)',
                'rgba(54, 162, 235, 0.2)',
                'rgba(255, 206, 86, 0.2)',
                'rgba(75, 192, 192, 0.2)',
                'rgba(153, 102, 255, 0.2)',
                'rgba(255, 159, 64, 0.2)'
            ],
            borderColor: [
                'rgba(255,99,132,1)',
                'rgba(54, 162, 235, 1)',
                'rgba(255, 206, 86, 1)',
                'rgba(75, 192, 192, 1)',
                'rgba(153, 102, 255, 1)',
                'rgba(255, 159, 64, 1)'
            ],
            borderWidth: 1
        }]
    },
    options: {
        scales: {
            yAxes: [{
                ticks: {
                    beginAtZero:true
                }
            }]
        }
    }
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.6/Chart.min.js"></script>
<link href='https://fonts.googleapis.com/css?family=Indie+Flower' rel='stylesheet' type='text/css'>
  
<canvas id="myChart" width="400" height="400"></canvas>

score:1

First result for google Chart.JS custom font

From documentation:

There are 4 special global settings that can change all of the fonts on the chart. These options are in Chart.defaults.global.

...

defaultFontFamily String "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif" Default font family for all text


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