Well the models weren’t that accurate with presence of normal temperatures this past week, only Monday was normal to slightly below with heat and humidity building back up to a pretty oppressive day on Thursday. This happened because the placement of the upper level atmosphere ridges and troughs is allowing systems to move from the south bring in heat and humidity.
Moving forward next week expect temperature to be up and down from normal (maybe below normal) to above normal changing every 2 days because of the upper level lows. Some models like the GFS hint at below normal temperatures around September 1st to 5th:
This would translate to a crisp 19 – 20c high. However the Euro model which is usually better at the long range says that warmth will mostly dominant, with only slightly cooler weather for a day or two.
Although things should remain dry, because of the progressive nature of systems and humidity moving in, expect that moist system could still make their way here. This Sunday would be our first chance at some rain, and then again mid week, but I think it will be scattered both times.
I would expect the next 15 days of September will continue to be warm most days. Watch for some tropical development in September, somebody could be in for a strong Hurricane this year.