If you’ve been hoping for a break from the hot weather that has baked Fresno and the Valley for what seems like forever, your hopes are about to come true.

An “abnormally” low pressure system arriving Wednesday will lower day and nighttime highs and could even help usher in some monsoonal thunderstorms and measurable amounts of rain. It’s abnormal because the Valley is usually baking under high-pressure ridges at this time of year. But the ridges are being pushed out by the oncoming low.

Wednesday’s forecast high for Fresno will still be on the toasty side of 98 degrees, but by Friday the high is forecast at 89 degrees — the first sub-90 day here since May 14, marking three full months of 90 degrees and above.

Even meteorologists like Brandolyn Zaeva of the National Weather Service in Hanford get tired of the Valley’s triple-digit heat. Zaeva, who hails originally from Phoenix, is no stranger to hot desert temperatures.

But the prospect of a brief spate of cooler weather has Zaeva “super-excited, because I’m so tired of this heat.”

Lower daytime highs will correspond with lower nighttime lows, dropping down to the upper 50s, which is good news for those of us who like to turn off the AC and open a window at night.

Enjoy it while you can, because Zaeva says the longer-range forecast for Fresno into early September is for above-normal temperatures, and that could mean — wait for it — a return of the dreaded triple-digits.

The upcoming week’s highs in the upper 80s and low 90s start to look pretty good by comparison.

The forecast for Fresno for the next seven days: Tuesday high of 101, overnight low of 69; Wednesday high of 98, overnight low 65; Thursday high 92, overnight 57; Friday high 89, overnight low 57; Saturday high 90, overnight 61; Sunday high 93, overnight 63; and Monday high’s, 90.