A low-pressure system moving inland to the north is expected to keep temperatures cooler across San Diego County, with gusty winds lingering in the mountains and deserts. High temperatures are expected to reach 69 near the coast, 69 to 72 inland, 71 to 76 in the western valleys, 64 to 72 in the mountain, and 82 to 86 in the deserts. A brief warm-up is expected for Wednesday, with temperatures expected to rise into the upper 70s. However, another system is forecast for Thursday, bringing another temperature dip and strong west winds.