San Antonio residents can expect a spell of varied weather patterns this week, with temperatures fluctuating and a chance of showers towards the weekend. According to the National Weather Service, today has begun with patchy fog ahead of what will become a mostly sunny day with highs reaching close to 91 degrees. The shift in wind from southwest to east-northeast may offer a slight reprieve from the heat.

The evening is set to bring increasing clouds with lows settling around 74 degrees, while Wednesday promises cloudy conditions in the morning and a scorching high near 99 degrees with heat index values soaring as high as 105. "Wednesday night is anticipated to be partly cloudy with a low around 72," as per a statement obtained from the National Weather Service.

Moving into Thursday, residents can expect mostly sunny skies and highs around 93 degrees, leading into a partly cloudy night with the lows dipping to about 69. The relative cool down continues into Friday, with forecasts predicting a mostly sunny day and a high near 82 degrees, according to KSAT 12's weather report.

The weekend might not be as clear, with Saturday's partly sunny skies giving way to increased cloudiness at night and a low around 64. "Sunday brings a chance of showers and thunderstorms," KSAT 12's weather team reports, alongside a partly sunny day with highs expected in the low 80s. As we head into the new week, Monday is projected to be partly sunny, with temperatures reaching up to 85 degrees.