This page compares weather observations made on the Dorothea with recent expected values (1961-90 normals). Observations were made of  air temperatures, wind speed and direction, pressure and humidity. Both observed and comparative recent values depend both on the date (position in the seasonal cycle) and the position of the ship - here we show time-series comparisons comparing the actual observations with those which would be expected by a hypothetical ship following the same course, at the same time of year, in recent decades.

Air Temperature

The seasonal cycle in pressure is much smaller than the short-term variability, so it's not very useful to compare modern averages with point observations. But, just to be consistent, here's the same plot for pressure:

Observed (red dots) and modern average (black line) air pressures.