Climate of Anchorage, United States

Dsc

Köppen-Geiger climate classification: Dsc — Cold, dry summer, cold summer.

Anchorage has a mean annual temperature of 3.5 °C and receives 585 mm of precipitation per year (1991–2020 climate normals). The warmest month is July with a mean temperature of 15.4 °C, while January is the coldest month at -8.0 °C. Most precipitation falls in September (102 mm); the driest month is April (20 mm).

Climate Diagram

Climate diagram for Anchorage: monthly mean temperature (red line, left axis, °C) and monthly precipitation (blue bars, right axis, mm), 1991–2020 -10 -20 0 0 10 20 20 40 30 60 40 80 50 100 60 120 °C mm J F M A M J J A S O N D

Walter–Lieth diagram: blue bars show monthly precipitation (right axis, mm), the red line shows monthly mean temperature (left axis, °C). Scale: 1 °C ≡ 2 mm.

Climate Table

MonthMean temperature (°C)Precipitation (mm)
January-8.038.8
February-5.535.2
March-3.228.4
April3.519.6
May9.124.0
June13.632.6
July15.457.6
August14.486.6
September9.9102.0
October3.066.4
November-4.144.6
December-6.649.1
Year3.5584.9

Live Forecast

Looking for the current weather instead of climate averages? Open the live forecast diagrams in WZ Diagrams — 15 weather models, ensemble spread, radar and more.

Data Source

Climate normals and Köppen-Geiger classification: Beck et al. (2023), Scientific Data 10, 724, CC BY 4.0. Period 1991–2020. Classification resolution ≈ 1 km; monthly climate data resolution ≈ 1 km (0.01°, Original 2023 release; predates the January 2026 correction), sampled at the grid cell containing the city coordinates (61.20°, -149.85°). Climate normals describe the long-term average, not current weather.