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Weather in Portsmouth in September 2025

Portsmouth Weather Forecast for September 2025, is based on previous years' statistical data.

September

• Sun
• Mon
• Tue
• Wed
• Thu
• Fri
• Sat

• 1
  +75°

  +64°

• 2
  +75°

  +61°

• 3
  +77°

  +64°

• 4
  +79°

  +64°

• 5
  +75°

  +63°

• 6
  +75°

  +64°

• 7
  +75°

  +64°

• 8
  +75°

  +63°

• 9
  +75°

  +63°

• 10
  +73°

  +63°

• 11
  +77°

  +63°

• 12
  +75°

  +63°

• 13
  +73°

  +61°

• 14
  +75°

  +63°

• 15
  +73°

  +61°

• 16
  +73°

  +59°

• 17
  +73°

  +59°

• 18
  +73°

  +61°

• 19
  +68°

  +59°

• 20
  +70°

  +57°

• 21
  +72°

  +57°

• 22
  +72°

  +59°

• 23
  +72°

  +57°

• 24
  +70°

  +57°

• 25
  +68°

  +55°

• 26
  +73°

  +57°

• 27
  +73°

  +57°

• 28
  +72°

  +61°

• 29
  +70°

  +59°

• 30
  +64°

  +54°