One data point doesn't contradict a trend. It doesn't confirm the trend either, but does provide support for it. Just look at the chart at the top of the artic

One data point doesn't contradict a trend. It doesn't confirm the trend either, but does provide support for it. Just look at the chart at the top of the article. The world isn't cooling down, and one slightly cooler month isn't any evidence that the trend will reverse itself, it just demonstrates that the trend isn't monotonic.