[thehappypm]

Outliers are likely to drag the averages down, not up. The only really substantial global outlier events are volcanic eruptions, which cause a net cooling. Everything else (hurricanes and the like) is just heat moving around

[CrazyStat]

We're looking at individual airport temperature records here, not global means.

[thehappypm]

So? A big volcanic eruption could cool many airports.

[CrazyStat]

Once we recognize that we're talking about local rather than global there are many local outliers that increase temperatures, countering your argument that volcanic eruptions are the only global outliers.