Map of Average Temps in the Northern Hemisphere JULY (climate, warmest, temperatures)

[wavehunter007]

I found quite an interesting map from a climate textbook – so I scanned it. The map shows average sea level temperatures (in F and C) for the warmest month (July) in the whole Northern Hemisphere. While not the best quality - the map shows some interesting geography to the temperature profile in the warmest month in the Northern Hemisphere:

Mean temps below 50 F (10 C) seem to be confined north of 60 latitude. Alaska, central/northern Canada, eastward through Siberia.

Mean temps above 80 F (26 C) heavy line …are found in the Northern Hemisphere tropics and subtropics from the equator to about 34 latitude. Most of southern Asia (Burma, India, southern China, the Middle East) as well as North Africa have mean July temps above 80 F . In the Americas, the northern Amazon, the Caribbean, Mexico, and the subtropical southern USA from the deserts of California to the lower East Coast (South Carolina) have monthly mean temps of 80 F or higher.

Mean temps in the 90’s (30 C ) are in the subtropical and tropical deserts: The Southwestern USA, North Africa, and the interior Middle East (Saudi Arabia) all have an area of above 90 F mean temps:





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[Weatherfan2]

Originally Posted by wavehunter007

I found quite an interesting map from a climate textbook – so I scanned it. The map shows average sea level temperatures (in F and C) for the warmest month (July) in the whole Northern Hemisphere. While not the best quality - the map shows some interesting geography to the temperature profile in the warmest month in the Northern Hemisphere:

Mean temps below 50 F (10 C) seem to be confined north of 60 latitude. Alaska, central/northern Canada, eastward through Siberia.

Mean temps above 80 F (26 C) heavy line …are found in the Northern Hemisphere tropics and subtropics from the equator to about 34 latitude. Most of southern Asia (Burma, India, southern China, the Middle East) as well as North Africa have mean July temps above 80 F . In the Americas, the northern Amazon, the Caribbean, Mexico, and the subtropical southern USA from the deserts of California to the lower East Coast (South Carolina) have monthly mean temps of 80 F or higher.

Mean temps in the 90’s (30 C ) are in the subtropical and tropical deserts: The Southwestern USA, North Africa, and the interior Middle East (Saudi Arabia) all have an area of above 90 F mean temps:





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The 60 degree and 70 degree isotherms are certainly placed too far south for NW Europe...

[B1987]

Originally Posted by Weatherfan2

The 60 degree and 70 degree isotherms are certainly placed too far south for NW Europe...

Yes, London's July mean is about 66F, Paris is 68F.

[wavehunter007]

Originally Posted by B1987

Yes, London's July mean is about 66F, Paris is 68F.

I was also a bit suprsied to see that the 70 F isotherm was stuck in the lowlands of the Mediterranean. It looks like the stuck Paris in the middle between the 60 F and 70 F isotherm…yet, I checked WCD and they seem to have Paris at 66 F in July:

http://www.worldclimate.com/cgi-bin/...1102+0714901G1

So Paris might not be all that far off.


London is without doubt too far below the 60 F isotherm...WCD has London/Heathrow as 65 F:

LONDON/HEATHROW AIRPO, UNITED KINGDOM Weather History and Climate Data

I checked my neck of the woods (USA): On the East Coast....the USA/Canada border (ME) is where the 60 F July isotherm is found... Boston is the line of the 70 F isotherm in July...and South Carolina is the line of 80 F isotherm in July. That small area with the 90 - 95 F in the American Desert Southwest seems to be in the right spot, so that looks pretty close too. Along our West Coast, southern CA has means over 70 F and the PNW has means just above 60 F. So as far as the USA, though the lines are broad, them seem pretty close.

Perhaps other CD psoters can check in with their areas and see how +/- close the map is? This is a very low res map, so these lines will not doubt be off by severel hundred miles. We can all sharpen our Geography skills on this map (lol).

[tom77falcons]

I think it is somewhat off when it comes to Philly. Our July mean temp is 77.6F. That map has us around 75F. Fayetteville, NC has a July mean of 80.1F, and Wilmington, NC is 81.1F.

Norfolk, VA is very close to 80F. The 80F isotherm needs to shift up in the eastern US to encompass southern NC, the 70F isotherm needs to shift up so that we are closer to the 80F line and not in the middle.