I came across a great website while researching temperatures in Guyana. If you're looking at breeding locality boas, this site could be VERY useful when designing a breeding program.

http://www.weatherbase.com

Here's some of the info I pulled off for Guyana.

Lethem, Guyana was the warmest city on record (for which there was data). It was also at a latitude closer to the equator than most other cities. A possible confounding factor is that there is only about 3 years worth of data available which could skew the data.

Additional note; Lethem has 12:01 of daylight on June 23rd (approx summer solstice) and 11:56 of daylight on December 23rd (approx winter solstice). Although the number of daylight hours and minutes is nearly identical, the angle of the sun would be DRASTICALLY different. Daylight hour data was taken off of:
http://aa.usno.navy.mil/data/docs/RS_OneYear.php by entering latitude and longitude of the cities.



Mazaruni was the coolest (on average) city for which extensive data was available.

Mazaruni has 12:30 of daylight on June 23rd (approx summer solstice) and 11:45 of daylight on December 23rd (approx winter solstice). So, being 3 degrees north made a difference of 45 minutes of light between the two cities when comparing summer solstice and winter solstice.



Notice the difference in annual rainfall!!! WOW! Again, this could be influenced by the number of years for which data is available, or it could be how it actually is.

The final thing to keep in mind (and I've mentioned this before in other threads), temperature readings are taken in the shade, four feet off the ground. So surface temperatures are higher if they're in direct sunlight. I imagine (although I don't know for sure and maybe someone smarter than me can confirm or deny) that surface temperatures are hotter in the summer time (independent of the air temperature) due to the angle of the sunlight.

Anyway, just thought I'd toss that out there.

Any thoughts?

jb
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What's written above is purely my opinion. In fact, MOST of what you read on the internet is someone's opinion. Don't take it too seriously

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