The heat index values will be near 100 and real temperatures will reach 95 Thursday and Friday but more seasonal temperatures are forecast for the weekend in Greenville and Upstate South Carolina.

These will be the hottest conditions of the year so far, which could cause stress to those without access to air conditioning and to those working outside.

Upstate SC Four Day Forecast

Today Sunny and hot, with a high near 97. Heat index values as high as 103. Calm wind becoming west southwest 5 to 8 mph in the morning.
Tonight Mostly clear, with a low around 73. Southwest wind 5 to 7 mph becoming calm in the evening.
Friday A 30 percent chance of showers and thunderstorms, mainly between 1pm and 4pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 103. West southwest wind 3 to 7 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night Partly cloudy, with a low around 73. North wind 3 to 6 mph.
Saturday A slight chance of showers between 1pm and 2pm, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. North northeast wind around 6 mph becoming south southwest in the afternoon. Chance of precipitation is 20%.
Saturday Night A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 73.
Sunday A chance of showers before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 92. Chance of precipitation is 60%.
Sunday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.