[ratboy666]

Very nice animation! Data is suspect, though -- US 1937 should be bright red, not pale yellow. 1937 had record heat wave in US.

[phaemon]

...which followed one of the coldest winters on record, which brings the average down.

[emj]

It's probably ok but you could look at the source data and be more specific, averages and base indexes can play tricks on the visualization. From the video:

https://data.giss.nasa.gov/gisstemp

Data source NASA GISS, GISTEMP Land-Ocean Temprature Index (LOTI), ERSSTv5, 12000km square smoothing.

Average of monthly temprature anaomolies. GISTEMP base period 1951-1980.