Several decades back, just as a lark, some grad students modeled the planet earth and what would happen if there was ever a spike in temperatures. (They did this back when the major prediction for the planet was that we were headed for a mini-ice age.)
What they found was that eventually the weather system, including the jet stream and ocean currents, would stall out. The weather for any locale ends up being whatever it is the vary day that this stall occurs, forever. (Or at least until a volcano or comet strikes the earth and puts up enough dust and debris to significantly reduce the sun's heating effect.)
So the weather that exists in your locale will be what it is forever, the moment that the stall occurs.
Within a year, various plagues will do in much of humanity. Since part of the effect of continuously moving weather is to air out the microbes and bacteria and mold in the environment and keep them moving along, once everything stagnates, plagues will rule. (A continuous flow of movement also keeps the fungal particulates and mold from developing.
Within short order, most animal and plant life would cease. This overall stagnation means too much rain in some places, too much sun in others. I imagine that fish, dolphins and whales and most other marine life might be okay though.
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