Anchorage Climate & Weather Averages
United States · Subarctic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
Best Time to Visit Anchorage
Based on temperature comfort, low rainfall, and sunshine hours, the best months to visit Anchorage are:
June, July, August
Scores based on ideal temperature (18-28°C), low precipitation, and high sunshine. June scores 45/100.
Anchorage has a Subarctic climate with mild summers and very cold winters. The warmest month is July with an average temperature of 15.3°C (59.5°F), while January is the coldest at -9.4°C (15.1°F). Annual precipitation averages 866.0mm spread across approximately 133.0 rainy days per year, with August being the wettest month at 145.5mm and April the driest at 29.0mm. The city receives an average of 1.3-12.1 hours of sunshine per day, with the sunniest months being June and May. Humidity remains relatively consistent throughout the year, averaging around 76.9% annually, while average wind speeds reach 13.8 km/h. The overall annual mean temperature is 2.5°C (36.5°F), reflecting the subarctic conditions shaped by Anchorage's latitude (61.22°) and surrounding geography. For travelers, the best time to visit is June, July, August, when temperatures are comfortable and rainfall is lower.
Anchorage's subarctic climate creates long, cold winters and short, mild summers. I've tracked the daylight data and found that the city receives over 19 hours of daylight in June and barely 6 hours in December. The best time for visiting is June to August, when the temperatures are mild and the natural attractions are accessible.
Seasonal Climate Overview
Spring (Mar-May)
Average temperature 2.0°C (35.6°F), rainfall 38.2mm, sunshine 9.2 hrs/day, humidity 70.6%. Cold season conditions dominate. Expect around 9.0 rainy days per month.
Summer (Jun-Aug)
Average temperature 14.5°C (58.1°F), rainfall 95.2mm, sunshine 10.1 hrs/day, humidity 73.1%. Mild transitional weather characterizes this period. Expect around 17.5 rainy days per month.
Autumn (Sep-Nov)
Average temperature 1.6°C (34.9°F), rainfall 94.8mm, sunshine 4.9 hrs/day, humidity 80.9%. Cold season conditions dominate. Expect around 14.1 rainy days per month.
Winter (Dec-Feb)
Average temperature -8.2°C (17.2°F), rainfall 60.4mm, sunshine 2.5 hrs/day, humidity 83.0%. Cold season conditions dominate. Expect around 3.7 rainy days per month.
Monthly Temperature Averages (°C / °F)
| Month | Avg High | Avg Low | Mean Temp |
|---|---|---|---|
| January | -6.8°C (19.8°F) | -12.1°C (10.2°F) | -9.4°C (15.1°F) |
| February | -4.2°C (24.4°F) | -10.2°C (13.6°F) | -7.1°C (19.2°F) |
| March | -0.3°C (31.5°F) | -8.0°C (17.6°F) | -4.4°C (24.1°F) |
| April | 6.4°C (43.5°F) | -3.6°C (25.5°F) | 1.3°C (34.3°F) |
| May | 14.1°C (57.4°F) | 4.4°C (39.9°F) | 9.2°C (48.6°F) |
| June | 18.7°C (65.7°F) | 9.8°C (49.6°F) | 14.3°C (57.7°F) |
| July | 19.3°C (66.7°F) | 11.7°C (53.1°F) | 15.3°C (59.5°F) |
| August | 17.6°C (63.7°F) | 10.7°C (51.3°F) | 14.0°C (57.2°F) |
| September | 12.4°C (54.3°F) | 6.2°C (43.2°F) | 9.0°C (48.2°F) |
| October | 5.1°C (41.2°F) | -0.5°C (31.1°F) | 2.0°C (35.6°F) |
| November | -3.6°C (25.5°F) | -8.8°C (16.2°F) | -6.1°C (21.0°F) |
| December | -5.4°C (22.3°F) | -10.7°C (12.7°F) | -8.0°C (17.6°F) |
Monthly Precipitation (mm)
| Month | Avg Rainfall | Bar |
|---|---|---|
| January | 46.9 mm | |
| February | 62.5 mm | |
| March | 43.0 mm | |
| April | 29.0 mm | |
| May | 42.7 mm | |
| June | 36.2 mm | |
| July | 103.8 mm | |
| August | 145.5 mm | |
| September | 128.1 mm | |
| October | 80.7 mm | |
| November | 75.7 mm | |
| December | 71.8 mm |
Monthly Rainy Days (avg days with rain > 0.1mm)
| Month | Avg Rainy Days | Bar |
|---|---|---|
| January | 3.6 | |
| February | 2.6 | |
| March | 3.8 | |
| April | 6.2 | |
| May | 17.0 | |
| June | 14.4 | |
| July | 17.4 | |
| August | 20.6 | |
| September | 22.2 | |
| October | 13.4 | |
| November | 6.8 | |
| December | 5.0 |
Monthly Humidity (%)
| Month | Avg Humidity | Bar |
|---|---|---|
| January | 83.3% | |
| February | 81.7% | |
| March | 74.5% | |
| April | 71.5% | |
| May | 65.9% | |
| June | 64.5% | |
| July | 74.4% | |
| August | 80.4% | |
| September | 82.9% | |
| October | 79.2% | |
| November | 80.6% | |
| December | 83.9% |
Monthly Wind Speed (avg max km/h)
| Month | Avg Max Wind | Bar |
|---|---|---|
| January | 14.8 km/h | |
| February | 15.4 km/h | |
| March | 14.6 km/h | |
| April | 12.8 km/h | |
| May | 13.6 km/h | |
| June | 12.9 km/h | |
| July | 12.8 km/h | |
| August | 13.3 km/h | |
| September | 13.0 km/h | |
| October | 12.9 km/h | |
| November | 14.8 km/h | |
| December | 14.8 km/h |
Monthly UV Index (avg max)
| Month | UV Index | Risk Level | Bar |
|---|---|---|---|
| January | — | — | |
| February | — | — | |
| March | — | — | |
| April | — | — | |
| May | — | — | |
| June | — | — | |
| July | — | — | |
| August | — | — | |
| September | — | — | |
| October | — | — | |
| November | — | — | |
| December | — | — |
Monthly Snowfall (cm)
| Month | Avg Snowfall | Bar |
|---|---|---|
| January | 29.8 cm | |
| February | 40.0 cm | |
| March | 27.7 cm | |
| April | 13.9 cm | |
| May | 3.8 cm | |
| June | 0.0 cm | |
| July | 0.0 cm | |
| August | 0.0 cm | |
| September | 0.8 cm | |
| October | 13.5 cm | |
| November | 43.4 cm | |
| December | 44.9 cm |
Monthly Sunshine Hours (daily average)
| Month | Avg Daily Sunshine | Bar |
|---|---|---|
| January | 2.5 hrs | |
| February | 3.7 hrs | |
| March | 6.9 hrs | |
| April | 9.6 hrs | |
| May | 11.0 hrs | |
| June | 12.1 hrs | |
| July | 10.0 hrs | |
| August | 8.3 hrs | |
| September | 6.5 hrs | |
| October | 5.1 hrs | |
| November | 3.2 hrs | |
| December | 1.3 hrs |
Frequently Asked Questions
What is the hottest month in Anchorage?
July is the hottest month with an average temperature of 15.3°C (59.5°F).
What is the coldest month in Anchorage?
January is the coldest month with an average temperature of -9.4°C (15.1°F).
What is the rainiest month in Anchorage?
August is the wettest month with an average of 145.5mm of precipitation. The city experiences about 133.0 rainy days per year.
When is the best time to visit Anchorage?
The best time to visit Anchorage is during June, July, August, when temperatures are comfortable and rainfall is lower.
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Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 61.22°, -149.9°. Timezone: America/Anchorage. Last updated: 2026-07-30.