Code:
google.charts.load('current', {'packages':['gauge']});
google.charts.setOnLoadCallback(drawChart);
function drawChart()
{
data = google.visualization.arrayToDataTable([
['Label', 'Value'],
["°C", 15],
]);
options = {
width: 200, height: 200,
min: 0,
max: 100,
majorTicks: ["10", "20", "30", "40", "50", "60", "70", "80", "90"],
minorTicks: 2
};
var chart = new google.visualization.Gauge(document.getElementById("gauge-div"));
chart.draw(data, options);
}