Alaska Summer Temperatures: July and August Averages by Region

Alaska's vast size (1/5 of US land area) creates enormous temperature variation. July-August averages by key locations:

July Averages (°F / °C)

LocationHigh/LowNotes
Anchorage55-75 / 13-24Maritime moderated; most populous
Fairbanks50-70 / 10-21Continental; warmest interior
Juneau45-60 / 7-16Coastal rainforest; cooler, wetter
Ketchikan50-65 / 10-18Southeast; mild, very wet
Nome40-55 / 4-13Bering Sea; Arctic influence
Utqiaġvik (Barrow)35-45 / 2-7Arctic Ocean; 24-hr sun, near freezing

August Averages (°F / °C)

LocationHigh/LowNotes
Anchorage50-70 / 10-21Slight cooling begins
Fairbanks45-65 / 7-18Rapid day-length loss
Juneau40-55 / 4-13Rain peaks
Ketchikan45-60 / 7-16Consistent maritime
Nome35-50 / 2-10Early frost possible
Utqiaġvik30-40 / -1 to 4Freezing nights return

Key Patterns

  • Interior (Fairbanks) – Warmest days, coldest nights; largest diurnal swing
  • Coastal (Juneau, Ketchikan) – Narrower range, wetter, cooler
  • Arctic (Nome, Utqiaġvik) – Near-freezing even in summer
  • Extremes possible: 90°F+ in interior; snow in July at elevation

Pack layers, rain gear, and insect repellent—Alaska summer is beautiful but unpredictable.

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