Four weeks of climate data: Northern Tropics Region #4

Even at full magnification of this map, the fourth region of the Northern Tropics looks empty, but looking carefully at the top middle, you will see a few dots that represent the Hawai'ian Islands.

There is one other island in the part of the Pacific that has a reliable weather station, and that is the American protectorate Johnson Island.

The patterns of the four season in Hawai'i all look about the same. There was a general warming trend in the last half of the 20th Century, but things dropped off in the first decade of the 21st.

Even with the drop-off, the median in the 1999-2010 era is slightly higher that the median for 1955-1975.

The story is repeated again.

The big difference between Fall and the other season is how consistent the record high temperature has stayed.

Confidence of the region warming: 90.8%
Confidence of decreasing rate: 99.9%
Change in median temperature from the 1955-1975 interval to the 1999-2010 interval: 0.14° C

We can't definitely show a warming trend overall, but it is extremely mild and the rate is getting absolutely getting slower.

Tomorrow, it's the last two parts of the Western Hemisphere's sections of the northern tropics, the first part dominated by Central America and the second part combining a little of the Guyanas in South America with a part of West Africa.