The weather in the Phoenix metropolitan area cools down before rising again to 100 degrees

If you're waiting for the heat to subside in Arizona, don't get too excited too soon.

Although a cooler-than-normal week is looming in the greater Phoenix area, it won't last long, says Mark O'Malley, a meteorologist with the National Weather Service in Phoenix.

The chance of rain in the valley for Sunday and Monday was originally around 40%, O'Malley said. But moisture moving further south and east reduced that chance to about 20 to 25% Monday afternoon. Precipitation is most likely in the east valley, likely in the form of brief showers.

As of about 2:30 p.m. Monday, O'Malley said there were scattered showers in the central and eastern parts of the metropolitan area, with a 20 to 25 percent chance of showers continuing until about 6 p.m.

For the rest of the week, the weather in the region will be drier, with highs between 30 and 35 degrees Celsius and lows between 15 and 21 degrees Celsius.

The cooler temperatures are unusual for this time of year, O'Malley said. The cooler temperatures were caused by a storm in northern Arizona, although temperatures are expected to return to triple digits next week.

Temperatures are five to 10 degrees below normal for this time of year, O'Malley said. The last day of 100 degrees Fahrenheit in the valley is usually the first week of October.