Anchorage, Alaska, offers a unique subarctic climate that attracts curious visitors and nature enthusiasts alike. Located in the northern hemisphere, Anchorage experiences cool summers with average highs of 67°F in July.
The cold season, spanning four months from November to March, brings average temperatures below 32°F. Snowfall is significant, averaging 74 inches annually, creating a winter wonderland perfect for outdoor adventures.
Anchorage’s climate can be quite variable and unpredictable, adding an element of surprise to your visit.
August 5 sees temperatures that are typically moderate, providing a pleasant environment for summer activities. The longer sunlight hours that peak in June and July enhance the beauty and vibrancy of the city during its warmer months.
For detailed weather information and monthly climate graphs, you can explore the detailed data on Climate Anchorage.
Anchorage’s subarctic climate is classified as Dfc according to the Köppen climate classification. The mixture of cool summers and cold winters defines its unique weather patterns. Days with precipitation are common, totaling about 103 per year, ensuring lush greenery and thriving ecosystems.
For those planning a trip, understanding the local weather can enhance the experience, making it easier to prepare for the diverse conditions Anchorage offers throughout the year.
Average Temperature in Anchorage, Alaska
The average temperature in Anchorage varies significantly throughout the year.
In winter, temperatures can be quite cold, typically reaching their lowest in January. Average low temperatures in January are around 13°F.
Summers are generally cool. In July, the warmest month, the high temperature averages near 68°F. Even in the hottest month, temperatures rarely exceed 75°F.
Here’s a quick look at the average monthly temperatures:
| Month | Average High (°F) | Average Low (°F) |
|---|---|---|
| January | 23 | 13 |
| June | 62 | 49 |
| July | 68 | 53 |
| December | 25 | 15 |
Spring and fall experience more moderate temperatures. For instance, April sees daily highs in the mid-40s°F, while October’s highs average in the mid-30s°F.
Winter months are long and cold with plenty of snow. Summer months see more daylight and warmer weather, making this period ideal for various outdoor activities.
A year-round look at weather by month helps in planning visits to Anchorage, with longer daylight hours in summer and shorter, colder days in winter.
Average Precipitation in Anchorage, Alaska
Anchorage experiences significant variation in precipitation throughout the year, including both rainfall and snowfall. The wettest months and the number of wet days are critical in understanding the patterns.
Average Rainfall in Anchorage, Alaska
Rainfall in Anchorage is most prevalent during the summer months. The city receives an average rainfall of around 16 inches annually.
August stands out as the wettest month, with average rainfall reaching 3 inches. On average, Anchorage has about 114 days of rain each year.
May through September typically experience the most rainfall. This period is critical for activities reliant on weather, making it vital for residents and visitors to plan accordingly. The number of wet days peaks during these months, with rain showers being a common occurrence.
Average Snow in Anchorage, Alaska
Snowfall is a significant aspect of Anchorage’s climate. The city receives an average of 75 inches of snow annually, primarily from October through April. December is often the snowiest month, with up to 20 inches of snowfall.
Snow days are frequent during this period, significantly impacting daily life, including transportation and outdoor activities. The city’s infrastructure is well-adapted to handle the heavy snowfall, ensuring accessibility and safety for residents and visitors. Anchorage’s extensive snow management practices are crucial, especially in the peak months of snowfall.
For further insights and related information about snow and ice conditions, refer to this detailed guide.
Average Sun in Anchorage, Alaska
Anchorage experiences varying daylight and sunshine hours throughout the year due to its northern location. This affects the amount of solar energy the city receives daily.
Average Daily Shortwave Solar Energy in Anchorage, Alaska
In Anchorage, the level of shortwave solar energy varies significantly through the seasons.
During summer months, from May to July, the city enjoys long daylight hours, with the sun sometimes shining for nearly 20 hours a day. This increases the reception of solar energy, peaking in June.
Winter months, however, tell a different story. From November to January, daylight is scarce, and some days might only have about 5 hours of sunlight. This limited daylight drastically reduces the average daily solar energy received.
In terms of sunrise and sunset times, June sees the earliest sunrise around 4:20 AM and the latest sunset close to 11:40 PM. Conversely, December records sunrises as late as 10:15 AM and sunsets as early as 3:45 PM. These changes greatly impact both the daily total sunshine hours and energy received.
Anchorage accumulates an average of 1,857 hours of sunshine annually. These sunshine trends make solar energy much higher during the summer, while it drops significantly in the winter.
Average Humidity in Anchorage, Alaska
The relative humidity in Anchorage varies throughout the year.
Monthly Averages:
- January: 73%
- February: 69%
- March: 67%
- April: 66%
- May: 62%
- June: 64%
- July: 66%
- August: 69%
- September: 71%
- October: 73%
- November: 74%
- December: 77%
The highest average relative humidity is in December at 77%, making it the most humid month. The lowest is in May at 62%.
Relative humidity affects how temperatures feel. On humid days, the air can feel warmer than it actually is. Dew point, the temperature at which air becomes saturated and can hold no more moisture, also plays a role. Higher dew points mean higher humidity.
Anchorage experiences both dry and cloudy periods. The winter months tend to be more dry, with lower humidity levels. Conversely, summer months, despite warmer temperatures, can still have moderate humidity.
For more detailed information, you can check out Average humidity in Anchorage.
Average Wind in Anchorage, Alaska
The average wind speed in Anchorage is mild compared to other regions. The typical speed is around 7 mph throughout the year, providing a consistent but gentle breeze.
During windier periods, gusts can reach up to 20 mph. The highest recorded wind speeds are generally around 12 mph from the southwest.
Monthly Wind Patterns:
- Winter: Wind speeds are relatively higher, especially from November to March.
- Spring: Slightly calmer periods with speeds averaging between 6 to 10 mph.
- Summer: The calmest months with averages typically around 5 to 8 mph.
- Autumn: Transition periods with speeds similar to spring.
Wind Directions:
The predominant wind direction is from the northwest. On windier days, the strongest gusts often come from this direction. The southwest also sees occasional high-speed winds.
Understanding these patterns can be beneficial for activities like hiking or fishing, ensuring safer and more enjoyable experiences.
Average Air Quality in Anchorage, Alaska
Anchorage generally enjoys good air quality throughout the year. As of the latest data, the Air Quality Index (AQI) in Anchorage is “Good.” This means the air quality poses little or no risk to the health of the general population.
AQI Categories:
- Good (0-50): Air quality is satisfactory.
- Moderate (51-100): Acceptable, though some pollutants may be a concern for a few people.
- Unhealthy for Sensitive Groups (101-150): Risk for children, elderly, and those with respiratory issues.
- Unhealthy (151-200): Health alert for everyone; may experience more serious effects.
- Very Unhealthy (201-300): Health alert; everyone may experience severe effects.
- Hazardous (301-500): Health warnings of emergency conditions.
Particulate Matter:
PM2.5 and PM10 levels are key indicators. PM2.5 levels in Anchorage often remain low but can increase during wildfires.
Seasonal Variations:
- Winter: Lower air pollution levels, except during temperature inversions.
- Summer: Increased risks during wildfires, affecting PM2.5 levels.
Air Monitoring Stations:
Key areas include:
- K Street
- North Star
- Taku / Campbell
- Laurel
- Lake Clark National Park and Preserve
Most of these stations consistently report data reflecting “Good” air quality.
Protection Measures:
Residents are encouraged to stay informed through real-time updates from AQI monitoring services.
anchorage’s air quality is generally good, benefiting both residents and visitors.
Topography of Anchorage, Alaska
Anchorage, Alaska is situated at approximately 61.2181° N latitude and 149.9003° W longitude.
This city is nestled between the Chugach Mountains to the east and the Cook Inlet to the west.
The elevation of Anchorage ranges from sea level at the coast to nearly 1,000 feet in the mountainous areas.
Most residential and commercial areas are located between 100 and 500 feet above sea level.
Key Features
- Chugach Mountains: These mountains provide a striking backdrop and influence the weather patterns, offering protection from some of the harsher Arctic conditions.
- Cook Inlet: This large body of water shapes the western boundary of Anchorage and contributes to the city’s maritime climate.
Elevation Zones
| Elevation (feet) | Area Characteristics |
|---|---|
| 0-100 | Coastal areas with water views |
| 100-300 | Low-lying residential and commercial areas |
| 300-500 | Hilly neighborhoods, offering elevated views |
| 500+ | Mountainous terrain, less populated, and more rugged |
These elevation zones highlight the variety in topography, giving residents different living conditions within close proximity.
Notable Landmarks
- Flattop Mountain: A popular hiking destination reaching 3,510 feet above sea level, providing panoramic views of the city and surrounding areas.
- Eagle River Valley: A picturesque area to the northeast that’s part of the larger Chugach State Park, known for its diverse wildlife and natural beauty.
The topography of Anchorage is a defining feature that shapes both its climate and lifestyle, offering a mix of urban convenience and natural beauty.
Extreme Weather Events that Occur in Anchorage, Alaska
Anchorage experiences several extreme weather events throughout the year. These include record-breaking high temperatures, heavy precipitation, deep freezes, and storms.
Temperatures in Anchorage can soar unexpectedly.
On July 4th, 2019, Anchorage hit 90 degrees Fahrenheit for the first time ever, beating the previous high from 1969 by five degrees.
The city also sees significant snowfall, leading to severe impacts.
For example, in early February 2024, a deep freeze caused roof collapses in Anchorage due to the heavy snow load.
Small towns like Kotzebue, located 550 miles from Anchorage, saw temperatures drop to minus 30 degrees Fahrenheit.
Precipitation records are often broken.
In 2022, Anchorage set an annual precipitation record.
This trend is driven by warming air and oceans, leading to more extreme precipitation events.
The area is not immune to storms either.
Coastal flooding and damaging winds are common.
Even though Anchorage is over 500 miles from Nome, significant storms can still affect the city, pushing it into the top five wettest years on record.
Best Time of the Year to Visit Anchorage, Alaska
The best time to visit Anchorage, Alaska, depends on what visitors are looking to experience. Each season offers different weather, activities, and attractions.
What is Anchorage, Alaska Like in Spring
Spring in Anchorage brings a gradual thaw and the beginning of longer daylight hours. Average temperatures range from 30°F to 50°F.
As the snow melts, the city transforms, offering a mix of snowy landscapes and budding greenery.
March to May is considered the shoulder season, making it a good time to visit for those who want to avoid summer crowds.
Wildlife becomes more active, and migratory birds return.
The longer days provide more time to explore outdoor attractions such as hiking trails and parks.
Spring also sees the start of various cultural events and festivals celebrating the end of winter.
It’s a season of renewal and a great time for photography, wildlife viewing, and enjoying the serene landscapes before the summer rush.
What is Anchorage, Alaska Like in Summer
Summer is the peak tourist season in Anchorage, with temperatures generally staying between 55°F and 65°F.
The midnight sun offers up to 18 hours of daylight, making it ideal for hiking, fishing, and wildlife viewing.
This period from June to August is great for exploring the outdoors.
Activities like kayaking, biking, and glacier tours are popular.
Visitors can enjoy festivals, outdoor markets, and cultural events throughout the city.
With pleasant weather and long days, summer is also the best time to experience the scenic beauty of places like Denali National Park and Prince William Sound.
The high season does mean more crowds and higher prices, so plan accordingly.
What is Anchorage, Alaska Like in Fall
Fall in Anchorage, which spans September through November, features cooler temperatures ranging from 35°F to 50°F. This time of year offers a mix of fall foliage and the first snowfalls.
It’s another shoulder season, so visitors can enjoy fewer crowds and lower prices.
Fall colors peak in September, making it an excellent time for scenic drives and photographs.
Wildlife is still active as animals prepare for winter, and fishing remains a popular activity.
The shorter daylight hours start to become noticeable, yet there’s still plenty of time to enjoy outdoor pursuits and explore the local culture.
What is Anchorage, Alaska Like in Winter
Winter in Anchorage is cold, with temperatures often dropping below 20°F.
Snow blankets the city, creating a winter wonderland perfect for activities like skiing, snowboarding, and dog sledding.
December through February sees the shortest days of the year, but the dark skies are perfect for Northern Lights viewing.
The city’s snowy landscape offers ample opportunities for winter sports and festivals.
The annual Fur Rendezvous Festival and the famous Iditarod dog sled race are must-see events.
Despite the harsh weather, winter in Anchorage provides a unique and memorable experience.
With proper preparation, visitors can enjoy the beauty and adventure of an Alaskan winter.