October Weather in Anchorage, United States

Last updated: February 24, 2025

In October, Anchorage, United States experiences a dynamic shift in weather, characterized by a maximum temperature of 14°C (57°F) and an average of 5°C (41°F), dipping to a chilly -7°C (20°F) at times. The month brings 129 mm (5.1 in) of precipitation over approximately 17 days, contributing to a notably humid atmosphere with humidity levels reaching 93%. This combination of cool temperatures and frequent rain sets the stage for a colorful autumn landscape, making October a unique and atmospheric month in Anchorage.

October Temperature in Anchorage

As October arrives in Anchorage, the crispness of autumn sets in, with temperatures beginning to dip from the mild conditions of summer. The month typically sees a minimum temperature of -7°C (20°F), while the average hovers around 5°C (41°F). This transitional period is marked by a comfortable maximum of 14°C (57°F), making it a season where the vibrant fall foliage can be enjoyed before winter's grip takes hold. Notably, compared to the preceding month, there’s a distinct drop in temperature, signaling the gradual approach of harsher conditions typical of the Alaskan winter. As daylight decreases, the chill in the air serves as a reminder of the stunning seasonal shifts that define life in this remarkable region.

October Weather in Anchorage: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Anchorage, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec192327374756605952412725
Data source: Temperature data for Anchorage generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Anchorage

In October, Anchorage experiences a notable increase in precipitation, with an average of 129 mm (5.1 in) of rain falling over 17 days. This marks a significant rise from the preceding months, particularly from the drier summer days of July and August. After a peak in September, where 109 mm (4.3 in) was recorded, October continues the trend of damp weather, signaling the transition to winter. The city's autumn months are characterized by their increasingly heavy precipitation, laying the groundwork for a snowy November ahead. This pattern highlights Anchorage's shift from its relatively mild summer to the crisper, wetter conditions of fall, making October one of the wetter months in the yearly cycle.

October Precipitation Trends in Anchorage

The chart displays monthly precipitation patterns in Anchorage, with values for each month alongside October's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec525244355348731121091298799
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Anchorage

In October, Anchorage experiences a notable drop in humidity to 93%, just slightly lower than the high levels observed in the summer months. This reflects a seasonal trend: after the peak of 100% in July and 99% in August, humidity gradually descends, dipping to 97% in September before stabilizing in October. The fall months maintain high humidity, yet October marks a transitional phase, hinting at the impending winter chill. As the year progresses, Anchorage's humid climate remains a defining characteristic, with sustained levels that fluctuate gently, echoing the natural shifts of the Alaskan seasons.

October Average Humidity in Anchorage

This chart illustrates the average monthly humidity levels in Anchorage, with October's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how October's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec95%95%90%82%85%95%100%99%97%93%97%98%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Anchorage

As October rolls into Anchorage, the UV Index drops to a low level of 2, indicating a safe environment for outdoor activities with a burn time of 45 minutes. This trend follows the descent from the higher summer indexes, peaking in July at 7, and gradually sliding down through the fall. With September's moderate UV Index at 4, October brings a notable decrease, offering residents and visitors a reprieve from intense sun exposure as the days grow shorter and cooler. It’s an ideal time to enjoy the beautiful autumn scenery without the concern of sunburn. For more detailed insights on UV levels throughout the year, check the site Anchorage UV Index.

Maximum UV Index Levels in Anchorage for October

The chart shows the monthly maximum UV Index (UVI) for Anchorage in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec113456754211
Data source: Anchorage October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

October Sunshine in Anchorage

As October graces Anchorage, the city sees a shift from the exuberant summer sunlight, recording 127 hours of sunshine. This marks a significant decline from September's 191 hours, signaling the approach of winter's embrace. The days grow shorter, yet October's golden rays often paint the landscape in stunning hues of amber and gold, creating a fleeting beauty before the long, dark months ahead. With the autumn air crisp and invigorating, residents relish these precious moments of daylight, the last whispers of warm sunshine before falling into the depths of winter, where only 94 hours await in November.

Monthly Sunshine Duration in Anchorage: October Highlighted

The October sunshine duration represents the total number of hours Anchorage experiences direct sunlight during the month of October, excluding cloudy or obstructed periods. This chart compares the sunshine duration of October with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec56h122h207h264h287h319h300h267h191h127h94h39h
Data source: Anchorage October Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Anchorage During October

As October rolls into Anchorage, the likelihood of sunny weather diminishes to just 19%, making it one of the cloudier months of the year. This trend is notable when compared to the 50% chance of sun in April, reflecting the shift from the longer, brighter days of summer to the onset of fall's gloom. While the early months of the year show a gradual increase in sunny days—from 25% in January to nearly 40% in March—October presents a stark contrast, underscoring the region's transition into winter. As daylight wanes and clouds roll in, residents and visitors alike may find themselves embracing the cozy charm of Anchorage rather than chasing after the elusive autumn sun.

Percentage of Sunny Days in October in Anchorage

The chart illustrates the percentage of sunny days in Anchorage throughout the year, with October highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Anchorage experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec25%33%39%50%32%30%23%34%31%19%36%24%
Data source: Anchorage October chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Anchorage in October

As October rolls in Anchorage, the city experiences a notable transition in daylight hours, with the sun gracing the skies for just 9 hours a day. This decline follows the vibrant summer months, where daylight peaked at an impressive 19 hours in June and remained generous throughout July and August. With the arrival of autumn, daylight diminishes steadily, dropping from 12 hours in September to 9 hours this month, signaling the onset of shorter days and longer nights. The seasonal shift starkly contrasts with the long, sunlit days of summer, inviting residents to embrace the cozy indoor moments before winter settles in, when daylight further dwindles to just 5 hours in December.

Average Daylight Hours in Anchorage for October

The chart illustrates the variation in daylight duration in Anchorage throughout the year, with October highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec6h 28m9h 1m11h 53m14h 49m17h 36m19h 14m18h 17m15h 40m12h 47m9h 53m7h 8m5h 32m
Data source: Anchorage daylight hours, calculated by summing the hours between sunrise and sunset for each day.

October Winds in Anchorage

As October arrives in Anchorage, the average wind speed gently picks up to 2.5 m/s (6 mph), reflecting a slight recovery from the summer's calmer breezes. Throughout the year, wind patterns show a clear fluctuation, with the winter months standing out, often featuring stronger gusts than those experienced during the mellow summer. Interestingly, while January carries the highest winds at 3.0 m/s (7 mph), the months leading up to October remain rather tranquil, with May and June seeing the lowest averages. This transition from the serene summer evenings to the more dynamic autumn winds heralds a change in Anchorage's climate, setting the stage for the brisk and invigorating days of winter that lie ahead.

Average October Wind Speed in Anchorage

The chart displays monthly wind speed patterns in Anchorage, with values for each month shown alongside October's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how October's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.02.72.32.51.91.81.82.02.42.5 m/s2.42.6
Data source: Anchorage October wind data, generated using information from the Copernicus Climate Change Service.

How October Weather in Anchorage Compares to Other Months

The weather in Anchorage changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Anchorage and find detailed weather information for every month.

October weather in Anchorage presents a milder climate with average temperatures ranging from a low of -7°C (20°F) to a high of 14°C (57°F), accompanied by significant precipitation of 129 mm (5.1 in) over 17 days. In contrast, January features much colder conditions, with temperatures dipping to a minimum of -25°C (-12°F) and averaging -7°C (19°F), while experiencing less precipitation at 52 mm (2.1 in) across 10 days. Additionally, the humidity is quite high in both months, peaking at 93% in October and slightly increasing to 95% in January. For more detailed information about January weather, visit Anchorage weather in January.

In comparing the weather between October and February, October tends to be milder, with average temperatures ranging from a minimum of -7°C (20°F) to a maximum of 14°C (57°F), while February is notably colder, with temperatures dipping as low as -18°C (0°F) and peaking at just 5°C (42°F). Precipitation levels also vary significantly; October experiences 129 mm (5.1 in) over 17 days, compared to February's lighter 52 mm (2.0 in) across only 10 days. Both months exhibit high humidity, but October's 93% slightly undercuts February's 95%. For more detailed insights, you can check out Anchorage weather in February.

The weather in October and March presents a stark contrast, particularly in temperature and precipitation patterns. In October, temperatures range from a minimum of -7°C (20°F) to a maximum of 14°C (57°F), with an average of 5°C (41°F), while March typically sees colder conditions, with a minimum reaching -17°C (2°F) and an average temperature of -3°C (27°F). Precipitation is significantly higher in October, totaling 129 mm (5.1 in) over 17 days, compared to March's 44 mm (1.7 in) spread over just 9 days. Humidity levels are relatively similar, with October at 93% and March at 90%. For a closer look at the specifics of March weather, you can refer to Anchorage weather in March.

In October, the weather in Anchorage is characterized by milder temperatures, with an average of 5°C (41°F) and a maximum of 14°C (57°F), while the minimum dips to around -7°C (20°F). The month is quite wet, with significant rainfall accumulating to 129 mm (5.1 in) over 17 days, alongside high humidity levels at 93%. In contrast, April presents cooler conditions, including a minimum temperature of -14°C (7°F) and an average of just 3°C (37°F), with a maximum reaching 13°C (56°F). Precipitation is much lighter in April, totaling only 35 mm (1.4 in) over 8 days, with humidity at a relatively lower 82%. For more detailed information about the weather during this month, you can check Anchorage weather in April.

October weather in Anchorage is characterized by colder temperatures and higher precipitation compared to May. While October sees average temperatures around 5°C (41°F) with maximums reaching 14°C (57°F) and minimums dropping to -7°C (20°F), May offers a milder experience, with average temperatures of 8°C (48°F) and maximums climbing to 19°C (67°F). Additionally, October experiences significant rainfall, with about 129 mm (5.1 in) over 17 days, whereas May is much drier with only 52 mm (2.1 in) over 11 days. The humidity also remains higher in October at 93% compared to 85% in May, contributing to a more damp and chilly atmosphere. For more detailed information, check out Anchorage weather in May.

The weather in October contrasts sharply with that of June in Anchorage. October brings much colder temperatures, with daily averages around 5°C (41°F) and nighttime lows dipping as low as -7°C (20°F), while June enjoys milder temperatures, ranging from a minimum of 6°C (43°F) to a comfortable maximum of 25°C (78°F). Moreover, October experiences significantly more precipitation, with 129 mm (5.1 in) falling over 17 days, compared to June’s 48 mm (1.9 in) over just 12 days. The humidity remains relatively high in both months, with October at 93% and June slightly higher at 95%. For more details, check out Anchorage weather in June.

When comparing the weather in October to that of July, it's clear that the two months present stark contrasts. October features much cooler temperatures, with an average of 5°C (41°F) and a maximum of only 14°C (57°F), while July enjoys significantly warmer conditions, averaging 16°C (61°F) and peaking at 27°C (81°F). Precipitation also differs, with October experiencing 129 mm (5.1 in) over 17 days, compared to July's 73 mm (2.9 in) spread over 12 days. Additionally, humidity levels are notably high in both months, but July holds a 100% humidity, which contributes to a muggy feeling, whereas October’s humidity averages around 93%. For a detailed look at the warmth of July, you can visit Anchorage weather in July.

October and August showcase a stark contrast in weather conditions. October experiences colder temperatures, with a minimum of -7°C (20°F) and an average of 5°C (41°F), compared to August’s milder range with a minimum of 7°C (44°F) and an average of 15°C (59°F). Precipitation levels are relatively similar, with October receiving 129 mm (5.1 in) over 17 days, while August has slightly less at 112 mm (4.4 in) over 15 days. The humidity in August is notably high at 99%, which creates a muggy atmosphere, whereas October's humidity is lower at 93%, contributing to its crisp autumn feel. For more detailed information, you can check Anchorage weather in August.

In comparing the weather of October and September, it is evident that October experiences a notable drop in temperatures, with minimums plunging to -7°C (20°F) and an average of only 5°C (41°F), in contrast to September's milder minimum of -1°C (31°F) and an average of 11°C (52°F). While both months see significant precipitation over 17 days, October has a slightly higher total of 129 mm (5.1 in) compared to September's 109 mm (4.3 in). Additionally, October is marked by a high humidity level of 93%, slightly lower than September’s 97%. For a closer look at weather patterns during this period, check out Anchorage weather in September.

October experiences relatively mild temperatures, with average highs reaching 14°C (57°F) and lows around -7°C (20°F). The month also sees significant precipitation, totaling 129 mm (5.1 in) over 17 days, and high humidity levels of 93%. In contrast, November ushers in colder conditions, with average temperatures dropping to a maximum of 7°C (44°F) and a minimum of -20°C (-4°F). Precipitation decreases to 87 mm (3.4 in) over 12 days, but humidity remains high at 97%. This shift marks a notable transition from the relatively warmer, wetter October to the chillier November climate, which can be explored in greater detail at Anchorage weather in November.

In October, the weather in Anchorage features milder temperatures, with minimums around -7°C (20°F) and an average of 5°C (41°F), reaching a maximum of 14°C (57°F). This month also sees significant precipitation, totaling 129 mm (5.1 in) over 17 days, and humidity levels remain high at 93%.

In contrast, December brings much colder conditions, with minimum temperatures dropping to -21°C (-6°F) and an average of -4°C (25°F), while maximums rarely exceed 7°C (44°F). Although precipitation is slightly reduced to 99 mm (3.9 in) over 16 days, humidity rises to 98%, lending a crispness to the frigid air. For a more detailed overview, you can check Anchorage weather in December.

Compare Anchorage's Climate with Cities Worldwide

Conclusion: What to Expect From October Weather in Anchorage

As October rolls into Anchorage, the transition to fall is unmistakable, bringing with it cooler temperatures and a noticeable increase in precipitation. The month frequently showcases chilly swings, where mild days hover around 5°C (41°F) but can dip significantly at night, resulting in a harsher environment compared to the milder summer months. With an average of 17 wet days contributing to nearly 129 mm (5.1 in) of rainfall, October is one of the cloudiest and dampest months in Anchorage. The high humidity, often reaching 93%, further adds to the crisp air, marking a distinct contrast from the sunnier and warmer days of previous seasons. To better understand how October fits into Anchorage's overall weather patterns, visit Anchorage Climate.