Do you need to know, when is the best time to go to Alaska? Then you should take a look here, what weather you can expect there during the year.
Alaska is part of USA - United States of America. The climate of USA is very varied, as United States of America is a large country. The climate is mostly temperate, but tropical in Hawaii and Florida, and arctic in Alaska. This is not all. The climate is semiarid in the great plains west of the Mississippi River, and arid in the Great Basin of the southwest. You can expect low winter temperatures in the northwest, but they are sometimes moderated in January and February by warm winds. Winters in the south are warmer. Don? forget, that temperatures are usually significantly lower in mountains.
When speaking about the usual weather in this area, the information is relevant for example for these popular places: Aleutian Islands, Anaktuvuk Pass, Anchor Point, Anchorage, Aniak, Arctic Alaska, Bald Head, Bering Land Bridge National Preserve, Bethel, Chicken, Circle, Coldfoot, Cooper Landing, Cordova, Deadhorse, Delta Junction, Denali National Park, Eagle River, Elim, Fairbanks, Fairbanks North Star Borough, Fox, Funter Bay, Gates of the Arctic National Park, Girdwood, Glacier Bay National Park, Glennallen, Golovin, Gustavus, Haines, Homer, Hyder, Interior Alaska, Juneau, Kachemak Bay State Park, Kaltag, Katmai National Park, Kenai, Kenai Fjords National Park, Kenai Peninsula, Ketchikan, King Salmon, Kodiak, Lake Clark National Park and Preserve, Little Diomede, Manley Hot Springs, Matanuska Susitna Borough, McCarthy, Misty Fiords National Monument, Moose Pass, Moses Point, Nikiski, Nome, North Pole, North Slope Borough, Palmer, Petersburg, Prince of Wales Island, Seward, Shaktoolik, Sitka, Skagway, Soldotna, Solomon, Southcentral Alaska, Southeastern Alaska, Southwestern Alaska, Talkeetna, Teller, Tok, Unalakleet, Unalaska, Ungalik, Utqiagvik, Valdez, Walla Walla, Wasilla, White Mountain, Willow, Willow Creek, Wiseman, Wrangell St. Elias National Park and Preserve, Yakutat, Yukon Charley Rivers National Preserve.
Let's look now what weather you can expect in the area around Anchorage and in many other cities. The warmest month here is July, the average maximum temperature is 20.1 ℃ (68.18 ℉). The average minimum temperature in this month is 12.2 ℃ (53.96 ℉). The coldest month here is January, the average maximum temperature is -4.9 ℃ (23.18 ℉). The average minimum temperature in this month is -12.6 ℃ (9.32 ℉). 
When travelling around Alaska, always consider the altitude of the the place as well. We should remind you, that the highest point in USA - United States of America is Denali (Mount McKinley) (6190 m) and the lowest point is Death Valley (-86 m). So there are huge differences in altitudes in this country and the weather is very different in them therefore. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in Alaska in January is this: The average highest temperature in Alaska in January is -4.9 ℃ (23.18 ℉). The average lowest temperature is -12.6 ℃ (9.32 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around -4.45 ℃ (23.99 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around -3.65 ℃ (25.43 ℉). The average rainfall is 21 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 5:37 (hours and minutes), in the middle of the month 6:24 and at the end of the month 7:35.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Alaska in February is this: The average highest temperature in Alaska in February is -2.4 ℃ (27.68 ℉). The average lowest temperature is -11.8 ℃ (10.76 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around -3.65 ℃ (25.43 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around -0.25 ℃ (31.55 ℉). The average rainfall is 20.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 7:35 (hours and minutes), in the middle of the month 8:57 and at the end of the month 10:23.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Alaska in March is this: The average highest temperature in Alaska in March is 1.9 ℃ (35.42 ℉). The average lowest temperature is -7.4 ℃ (18.68 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around -0.25 ℃ (31.55 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 5.05 ℃ (41.09 ℉). The average rainfall is 15.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:23 (hours and minutes), in the middle of the month 11:49 and at the end of the month 13:15.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Alaska in April is this: The average highest temperature in Alaska in April is 8.2 ℃ (46.76 ℉). The average lowest temperature is -1.1 ℃ (30.02 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 5.05 ℃ (41.09 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 11.4 ℃ (52.52 ℉). The average rainfall is 10.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:15 (hours and minutes), in the middle of the month 14:41 and at the end of the month 16:06.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Alaska in May is this: The average highest temperature in Alaska in May is 14.6 ℃ (58.28 ℉). The average lowest temperature is 5.2 ℃ (41.36 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 11.4 ℃ (52.52 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 16.6 ℃ (61.88 ℉). The average rainfall is 20.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 16:06 (hours and minutes), in the middle of the month 17:27 and at the end of the month 18:35.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Alaska in June is this: The average highest temperature in Alaska in June is 18.6 ℃ (65.48 ℉). The average lowest temperature is 9.4 ℃ (48.92 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 16.6 ℃ (61.88 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 19.35 ℃ (66.83 ℉). The average rainfall is 30.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 18:35 (hours and minutes), in the middle of the month 19:16 and at the end of the month 19:14.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Alaska in July is this: The average highest temperature in Alaska in July is 20.1 ℃ (68.18 ℉). The average lowest temperature is 12.2 ℃ (53.96 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 19.35 ℃ (66.83 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 19.15 ℃ (66.47 ℉). The average rainfall is 51.4 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 19:14 (hours and minutes), in the middle of the month 18:31 and at the end of the month 17:22.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Alaska in August is this: The average highest temperature in Alaska in August is 18.2 ℃ (64.76 ℉). The average lowest temperature is 10.4 ℃ (50.72 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 19.15 ℃ (66.47 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 15.85 ℃ (60.53 ℉). The average rainfall is 80.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 17:22 (hours and minutes), in the middle of the month 16:02 and at the end of the month 14:38.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Alaska in September is this: The average highest temperature in Alaska in September is 13.5 ℃ (56.3 ℉). The average lowest temperature is 5.8 ℃ (42.44 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 15.85 ℃ (60.53 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 9.4 ℃ (48.92 ℉). The average rainfall is 84.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 14:38 (hours and minutes), in the middle of the month 13:14 and at the end of the month 11:49.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Alaska in October is this: The average highest temperature in Alaska in October is 5.3 ℃ (41.54 ℉). The average lowest temperature is -1.4 ℃ (29.48 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 9.4 ℃ (48.92 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 1.55 ℃ (34.79 ℉). The average rainfall is 44.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:49 (hours and minutes), in the middle of the month 10:24 and at the end of the month 8:59.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Alaska in November is this: The average highest temperature in Alaska in November is -2.2 ℃ (28.04 ℉). The average lowest temperature is -9 ℃ (15.8 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 1.55 ℃ (34.79 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around -3.1 ℃ (26.42 ℉). The average rainfall is 26.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 8:59 (hours and minutes), in the middle of the month 7:38 and at the end of the month 6:26.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Alaska in December is this: The average highest temperature in Alaska in December is -4 ℃ (24.8 ℉). The average lowest temperature is -11.5 ℃ (11.3 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around -3.1 ℃ (26.42 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around -4.45 ℃ (23.99 ℉). The average rainfall is 48.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 6:26 (hours and minutes), in the middle of the month 5:38 and at the end of the month 5:29.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.| Anchorage | temperature: - | highest temperature: -4 ℃ (24.8 ℉) | lowest temperature: -11.5 ℃ (11.3 ℉) | rainfall: 48.7mm | rainy days: - |
| Fairbanks | temperature: - | highest temperature: -14.6 ℃ (5.72 ℉) | lowest temperature: -23.2 ℃ (-9.76 ℉) | rainfall: 18mm | rainy days: - |
| Juneau | temperature: - | highest temperature: 2.8 ℃ (37.04 ℉) | lowest temperature: -2 ℃ (28.4 ℉) | rainfall: 229.4mm | rainy days: 21.1 |
| Ketchikan | temperature: - | highest temperature: 4.5 ℃ (40.1 ℉) | lowest temperature: -0.4 ℃ (31.28 ℉) | rainfall: 369.5mm | rainy days: 23.2 |
| Sitka | temperature: - | highest temperature: 5.1 ℃ (41.18 ℉) | lowest temperature: 0.7 ℃ (33.26 ℉) | rainfall: 228.2mm | rainy days: 21.4 |