While the season for an Alaska cruise is from May to September, there is quite a variation in location, temperature and daylight.

The warmest spot you might visit on an Alaska cruise is Fairbanks, Alaska. The average high in July is 72° F. But you have to watch out for the mosquitos. They won't bother you so much on the Inside Passage ports, but you can see them in the interior. The information below is set up by city.

All degrees are in Fahrenheit

Location	May	June	July	August	September
Anchorage	54	62	65	63	55
Fairbanks	66	70	72	66	54
Juneau	58	61	64	62	56
Arctic	39	50	59	57	47

One thing you must be aware, of course, is the variability of the Alaska weather from year to year. In some cases you can find it warmer in September than in July, mainly because you got caught in the rain during that month. Or it can be cold in June and warmer in July.

The information below provides the amount of daylight you will have in Alaska during each month. This will give you an indication of why some of the cruise ships stay so late in some of the ports. The tables indicate how many hours of daylight on the average during each month at each Alaska location.

All degrees are in Fahrenheit

Location	May	June	July	August	September
Anchorage	18	19	18	16	13
Fairbanks	20	21	20	16	14
Juneau	17	18	17	16	13
Arctic	20	24	22	18	11

Therefore the high season for Alaska is approximately June 15 to August 15. That is when there is the highest temperatures and most daylight. On the other hand, if your interests lead you to go by when the whales will be there, when the flowers in spring bloom, or a certain fishing season, then you will be guided by those seasons.