Delta Junction, AK Climate

Climate Insight: Delta Junction, AK

In Delta Junction, Alaska, the NOAA 1991–2020 climate normals put the annual average temperature at 27°F, ranging from a mean daily high of 39°F to a mean daily low of 16°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00502352, these numbers smooth out year-to-year noise into a working baseline for a typical month.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Delta Junction sees about 11.8 inches of precipitation a year, with 42.2 inches typically falling as snow. The frost-free season averages 77 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near June 5 and the first fall freeze near August 21. On the energy side, 13,718 heating degree days and 13 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Delta Junction scores 39/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, July-driven heat at the peak of summer, and January-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.