An old Alaskan saying goes, there are four seasons in Alaska – winter, June, July and August. While this is true to an extent – weather is cold and wintery bar the months of high summer - May and September can also offer a warmer climate.
General overview of the weather in Alaska
While ice and snow abound, Alaska cruise routes steer clear of the Arctic zone, which means that the weather during Alaska cruise season is not as cold as you might think. In fact, many mid-summer days are surprisingly warm.
Most of the regions Alaska cruises visit are in the South-Eastern and Southern parts of the state, which both have a milder, wetter climate than the Northern Arctic regions.
Alaska cruise weather in May
May is the start of the warmer season in the Alaska Inside Passage, although on average the weather is still very cold, with highs of around 57°F/14°C and lows of around 35°F/1°C. This is the driest time of year, although skies tend to be cloudy. Winds are low, and there are generally at least 15 hours of daylight.
Alaska cruise weather in June
Cruise temperatures in Alaska in June are generally comfortably warm or cool, ranging from highs of 62°F/16°C and lows of 43°F/6°C. June is still likely to be somewhat cloudy and wet, with low wind speeds.
Alaska cruise weather in July
The Alaska cruise season is warmest in July, with highs of 68°F/20°C and lows of 50°F/10°C, although it can still be very cold at night and in the early mornings.
Alaska cruise weather in August
The Alaskan summer starts to cool down in August, although temperatures are still pleasant yet cool on average. Highs are around 62°F/16°C and lows are around 45°F/7°C.
Alaska cruise weather in September
As the cruise season in Alaska starts to draw to a close in September, the temperatures can drop sharply, reaching only around 43°F/6°C on average. Skies tend to become cloudier and wetter, although there are still at least 12 hours of daylight to enjoy.