MOST ACCURATE FORECAST: Cool-down coming! Rain chances ahead too.

Posted at 4:33 AM, Dec 06, 2021
and last updated 2021-12-06 23:13:46-05

PHOENIX — Clouds are moving into Arizona overnight as a storm system moves down the California coast line.

By Tuesday morning, rain and snow showers will be possible across northern Arizona.

Accumulations will be light (one to two inches or less), but snow will be possible for areas above 6,000 feet in elevations.

Here in the Valley, we're expected to stay dry overall, but a few random sprinkles may be possible.

Then, a second stronger storm moves in on Thursday.

This one will bring much colder air, dropping Valley highs into the low to mid 60s with overnight lows plummeting to the upper 30s to low 40s by Saturday morning.

Winds will pick up and rain chances will ramp up here in the Valley Thursday evening. Some spots could see up to a quarter of an inch of rain across the Phoenix metro area.

We're also tracking the chance of around two to five inches of snow up north, including in Flagstaff.

Wind gusts will peak near 25 mph here in the Valley, but they could top 40 mph in parts of northern Arizona Thursday evening.

We will keep tracking the storm and bring you more updates as this one gets closer!


2021 Rainfall totals:

Sky Harbor Official Rainfall: 5.58" (-1.04" from average)

Valley Average (Phoenix Rainfall Index): 7.16"

Daily rainfall reports from all across the Valley can be found here.


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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