Latest Phoenix climatic averages (deal, average, summer)

[Valley Native]

https://w2.weather.gov/climate/xmacis.php?wfo=psr

The new 30 year averages for Phoenix's climate data were recently released, and there are some pretty significant changes from the last update 10 years ago. There should be no question that temperature averages have increased, and precipitation averages have decreased. Surprisingly, the one exception to this was the month of May, which saw a slight temperature decrease, and the average precipitation increased slightly ... which really means very little considering that May is the second driest month of the year.

It should be no surprise that July remains the hottest month with an average temperature of 95.5 degrees, and August not far behind with an average of 94.4 degrees. December and January remain the coldest months of the year ... December being the colder of the two with an average of 55.8 degrees.

Both rainy seasons saw the largest drop in precipitation ... however, what hasn't changed is that winter (December through March) is still the primary wet season with 3.31 inches, and the summer monsoon is the second wettest time of year with 2.43 inches. August is now officially the wettest month of the year with an average of 0.93 inches, but this is hardly significant when considering that January & February both average 0.87 inch (a mere 0.06 difference).

[locolife]

I was able to find some more specific figures from a 12 news article.

• A drop in average rainfall from 8.03 inches to 7.22 inches.
• A drop in average rainfall during the monsoon from 2.71 inches to 2.43 inches.
• An increase in the average number of 100-degree days from 109 days to 111 days each year.
• An increase in the average number of 110-degree days from 18 days to 21 days each year.

And from a national view you can see the entire country and probably the entire planet is warming up.

[Valley Native]

Originally Posted by locolife

I was able to find some more specific figures from a 12 news article.

• A drop in average rainfall from 8.03 inches to 7.22 inches.
• A drop in average rainfall during the monsoon from 2.71 inches to 2.43 inches.
• An increase in the average number of 100-degree days from 109 days to 111 days each year.
• An increase in the average number of 110-degree days from 18 days to 21 days each year.

And from a national view you can see the entire country and probably the entire planet is warming up.

The UHI has caused a great deal of our increase in temps, especially overnight lows. The "global warming" aspect, as well as possibly the decrease in precipitation could be more of a cyclical pattern. There were quite a few cold spells and record low temps during the 1960s. The 1980s & 1990s seemed to be 2 of the wetter decades in recent history. Ever since the late 1990s, the pattern has definitely been drier & hotter. I think there were only 4 years in the last 20 that were wetter than average.