Chart.js canvas and chart width gets overwritten when redrawn

My charts that I made with chart.js grow each time when I redraw them and I have no idea why. My code for the chart cavas is:

let tempChart = document.getElementById("tempChart").getContext('2d');
let pressureChart = document.getElementById("pressureChart").getContext('2d');
let O3Chart = document.getElementById("O3Chart").getContext('2d');
let PM1Chart = document.getElementById("PM1Chart").getContext('2d');

<canvas id="tempChart"></canvas>
<canvas id="pressureChart"></canvas>
<canvas id="O3Chart"></canvas>
<canvas id="PM1Chart"></canvas>

This is the code I call each time when I want to draw or redraw a chart:

function createChart(chartLabels, chartData, chart, label, backgroundcolor, beginAtZero, borderColor) {

    let LineChart = new Chart(chart, {
        type: 'line',
        data: {
            labels: chartLabels,
            datasets: [{
                label: label,
                data: chartData,
                backgroundColor: backgroundcolor,
                pointRadius: 0,
                borderColor: borderColor
        }]
        },
        options: {
            responsive: false,
            scales: {
                yAxes: [{
                        ticks: {
                            beginAtZero: beginAtZero
                        }
                }
                ]
            }
        }
    })

}

The CSS of the canvas before I run createChart once:

    width: 45%;
    padding: 20px 20px;
    border-bottom: 1px solid #dedede;

CSS after I run createChart:

    display: block;
    height: 341px;
    width: 683px;

I have tested this code with empty and full arrays for my labels and data and in both instances the chart grows each time I call the createChart function.