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MOST ACCURATE FORECAST: More record heat before rain moves in

High pressure remains firmly in control, setting us up for more record-breaking heat to start the week! Monday’s forecast high of 82 degrees would break the record of 79 set back in 1917.

By: Jorge Torres

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PHOENIX — High pressure remains firmly in control, setting us up for more record-breaking heat to start the week!

Monday’s forecast high of 82 degrees would break the record of 79 set back in 1917.

Changes arrive by Christmas, with cooler temperatures and increasing rain chances across Arizona.

Rain develops in waves starting Tuesday and continues through Christmas, with the highest chance from Christmas Eve night into Christmas morning.

Wednesday and Thursday are ABC15 Weather Action Days, as rain may impact travel and events leading up to Christmas.

Valley highs cool into the mid-70s on Wednesday and Thursday, still running about 10 degrees above normal for late December.

Snow levels remain high with this system, generally between 10,000 and 11,000 feet. Most higher elevations see rain, with some snow possibly mixing in late Friday.