Back to 100 degrees | Phoenix Weather
As we return to around 100 degrees for highs by Thursday, the cause is a high pressure ridge in the upper atmosphere entering Arizona from the west. The effect will certainly be strong enough to warm us up, but it won’t stay on for very long, so the heat period should be limited to around three days. After that, a system of storms developing off the coast of the Pacific Northwest will move towards us and bring us cooler temperatures by Sunday. And northern Arizona could see a downpour or two on Sunday and Monday as the storm is expected to “cut” from the main jet stream and swirl around Arizona for a few days.
The overnight lows for Wednesday morning will be in the 60s and we are looking for highs in the upper 90s. On Thursday we’re back to triple-digit highs and will stay there Friday and Saturday. (For those of you who entered the family’s “103 Degree Contest” in Arizona, there’s a slight chance we may be successful this week.)
Sunday and Monday we cool down to the mid 90s and Tuesday we will see highs around 97. The best chance for rain in the high country will be Monday, but again we expect nothing more. as isolated showers if rain does materialize. BTW, around the same time last year, we had already recorded 13 days of 100 degrees or more. So far this year, we’re only two days away.