Update, 8:30 a.m. Friday: Heat index values will be in the triple digits Sunday through Thursday. Sunday’s heat index is expected to reach 103 degrees, according to the NWS. Limit your time outdoors on Sunday between 10 a.m. and 6 p.m. If you must be outdoors, take frequent breaks and stay hydrated.

Previously:

CLARKSVILLE, TN (CLARKSVILLE NOW) – Summer starts Friday, and it’s kicking off a week of extreme heat.

Temperatures start to climb Friday, initiating a prolonged heat wave for several days, according to the National Weather Service. Expect highs in the mid-90s, with low triple digits heat index values.

Highs will remain in the mid-90s well into next week.

Clarksville forecast

Here’s the day-by-day outlook:

  • Friday: Sunny, with a high near 89. Calm wind becoming south southwest around 5 mph.
  • Friday night: Mostly clear, with a low around 70. Calm wind becoming south southeast around 5 mph.
  • Saturday: Sunny, with a high near 93. Heat index values as high as 105. South southwest wind around 5 mph.
  • Saturday night: Mostly clear, with a low around 74. South wind around 5 mph becoming calm in the evening.
  • Sunday: Sunny, with a high near 94. South southwest wind around 5 mph.
  • Sunday night: Mostly clear, with a low around 74. South wind around 5 mph becoming calm.
  • Monday: Sunny, with a high near 93. Calm wind becoming south southeast around 5 mph.
  • Monday night: Mostly clear, with a low around 74. Calm wind.
  • Tuesday: Sunny, with a high near 94. Calm wind becoming south southeast around 5 mph.
  • Tuesday night: Mostly clear, with a low around 74.
  • Wednesday: Sunny, with a high near 94.
  • Wednesday night: Mostly clear, with a low around 74.
  • Thursday: Mostly sunny, with a high near 93.

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