Anchorage, United States skyline

Anchorage Weather in August

What August is usually like in Anchorage, United States — from 2006–2025 averages.

Expect Anchorage to reach about 16.9°C (62.4°F) by day and 10.8°C (51.4°F) at night in August, with 17 rainy days bringing 128 mm and around 8.8 hours of sunshine each day.

Avg high

16.9°C (62.4°F)

Avg low

10.8°C (51.4°F)

Rainfall

128 mm (5 in)

Rainy days

17 days

Sunshine

8.8 h / day

Humidity

80%

August vs the rest of the year

August is warmer than 10 of the other 11 months, and the 2nd wettest month in Anchorage.

MonthAvg highvs AugustRainRainy days
January-6.4°C (20.5°F)−23.3°C (−41.9°F)64 mm12
February-4.1°C (24.6°F)−21°C (−37.8°F)62 mm11
March-0.7°C (30.7°F)−17.6°C (−31.7°F)46 mm9
April5.6°C (42.1°F)−11.3°C (−20.3°F)39 mm9
May12°C (53.6°F)−4.9°C (−8.8°F)45 mm10
June16.6°C (61.9°F)−0.3°C (−0.5°F)54 mm11
July18.2°C (64.8°F)+1.3°C (+2.3°F)89 mm13
August16.9°C (62.4°F)—128 mm17
September12.4°C (54.3°F)−4.5°C (−8.1°F)142 mm18
October5.4°C (41.7°F)−11.5°C (−20.7°F)103 mm14
November-3°C (26.6°F)−19.9°C (−35.8°F)74 mm12
December-5.3°C (22.5°F)−22.2°C (−40°F)77 mm14

What August feels like in Anchorage

In Anchorage, August brings late summer. Afternoons are cool, pleasant for walking as long as you keep a layer on. There is little difference between day and night: nights are cool, and evenings feel much like the afternoon. Moisture in the air gives the cold a damp edge.

Rain in Anchorage in August

Rain is part of normal life this month, falling on about every other day. Wet days average about 7.5 mm (0.3 in), enough to soak you without an umbrella. That is close to Anchorage's typical rain per wet day for the whole year (about 6.1 mm). It is among the three wettest months of the year.

Daylight and sunshine in August

Mid-month, Anchorage gets 15 h 57 min of daylight, from sunrise near 6:06 am to sunset near 10:03 pm. Compared with mid-July, the day has lost 2 h 35 min. The sun is out for roughly 55% of those daylight hours, so sun and cloud share the day.

How August compares to the rest of the year

August is the 2nd warmest month of the year in Anchorage. Against July, the average high is 1.3°C (2.3°F) lower, with 39 mm more rain. September is cooler again. By September, typical highs are 12.4°C (54.3°F).

Who August suits

  • Sightseeing: less ideal — rain falls on more than half the days.
  • Parks & outdoor: less ideal — rain interrupts outdoor plans.
  • Beach: less ideal — the sea air is too cool.
  • Hiking: less ideal — trails are cool.
  • Museums & indoor: a good choice — with rain on most days, galleries and museums make easy plans.

Tips for visiting Anchorage in August

Rain Protection

Keep a small umbrella in your bag and wear shoes that cope with puddles.

Light Jacket

A light jacket or knit layer is enough for most of the day.

Sunglasses

Bright days make sunglasses worth packing.

Quick questions

How warm is Anchorage in August?

Expect around 16.9°C (62.4°F) in the afternoon and 10.8°C (51.4°F) at night, which most visitors would call cool.

Does it rain a lot in Anchorage in August?

Quite a lot — 128 mm spread over about 17 days.

What should I wear in Anchorage in August?

Based on the averages: rain protection, a light jacket and sunglasses. Evenings feel similar to the day, so the same clothes work from morning to night.

Is August or September better for visiting Anchorage?

August, narrowly: it ranks #4 of 12 among Anchorage's months, against #5 for the other. September is cooler and has more rainy days.

Is August a good time to visit Anchorage?

Fair

Fair — mild but cool days, rain on most days (about 17), plenty of sunshine (8.8 h a day). Within Anchorage's own year, August ranks #4 of 12.

August in other United States cities

Warmer or drier places in August

Plan a trip to Anchorage

Get a day-by-day weather score for your exact travel dates.

Open the Trip Planner

Monthly averages from 20 years of Open-Meteo history (2006–2025), not a forecast — see all 12 months in Anchorage weather by month.