FORECAST: December heatwave continues!

PHOENIX — High pressure is keeping Arizona incredibly warm this December!

Phoenix set back-to-back records on Sunday and Monday with highs in the low 80s, and now more record-breaking 80s are in the forecast as we inch closer to Christmas.

That’s around 15 degrees above normal for this time of year!

With Valley highs in the 70s Wednesday and Thursday, daily heat records are safe, but we’ll be back in the low 80s starting Friday.

More daily heat records will be in jeopardy Sunday, Monday and Tuesday in Phoenix.

We are tracking a possible shift in the forecast by Christmas Day that could include cooler air and maybe even some chances for rain across Arizona. Stay tuned for updates as we get closer!

2025 Sky Harbor Official Rainfall to date: 8.28″ (+1.40″ from average)

Monsoon 2025 Sky Harbor Official Rainfall: 2.76″ (+0.33″ from average)
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Daily rainfall reports from all across the Valley can be found here.
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PHOENIX IS GETTING DRIER – LOWER RAINFALL AVERAGES NOW

Average Monsoon Rainfall in Phoenix (1981-2010): 2.71″ of rain

NEW Average Monsoon Rainfall in Phoenix (1991-2020): 2.43″ of rain

Average Yearly Rainfall in Phoenix (1981-2010): 8:03″ of rain

NEW Average Yearly Rainfall in Phoenix (1991-2020): 7.22″ of rain
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See the full 7-Day forecast

Interactive Arizona Radar