Big Delta, AK climate
Big Delta has cold, snowy winters and cool summers, with very little rain. A typical July afternoon reaches 70°, a January night drops to -16°, and about 43 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Big Delta feels like
Winter
Spring
Summer
Fall
Big Delta weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground |
|---|---|---|---|---|---|---|
| January | 3° | -16° | 0.4" | 6.2" | 7 | 31 |
| February | 13° | -9° | 0.3" | 4.7" | 6 | 28 |
| March | 24° | -6° | 0.3" | 3.6" | 5 | 30 |
| April | 44° | 17° | 0.3" | 2.5" | 4 | 15 |
| May | 60° | 32° | 1.0" | 1.2" | 8 | 1 |
| June | 69° | 43° | 2.4" | 0 | 13 | 0 |
| July | 70° | 46° | 2.8" | 0 | 15 | 0 |
| August | 64° | 41° | 2.1" | 0 | 15 | 0 |
| September | 53° | 29° | 1.3" | 1.5" | 10 | 1 |
| October | 32° | 14° | 0.7" | 7.4" | 9 | 15 |
| November | 12° | -5° | 0.6" | 8.9" | 8 | 29 |
| December | 6° | -12° | 0.5" | 6.8" | 7 | 30 |
| Year | 37° | 14° | 12.6" | 42.8" | 107 | 181 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more.
Rain and snow in Big Delta
Big Delta gets 13 inches of rain and melted snow a year. July is the wettest month and April the driest. Rain or snow falls on about 107 days a year. Snow covers the ground about 181 days of the year.
A year-round growing season
Heating and cooling a home in Big Delta
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Big Delta, 100% of that work is heating and 0% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Big Delta and its neighbors
Big Delta borders 3 towns with climate data. January nights across them vary by 7.8°. Deltana has the coldest January nights (-13°) and Whitestone the hottest July afternoons (74°). Big Delta’s January low is -16° and its July high 70°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Big Delta compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Big Delta’s climate
What is the coldest month in Big Delta?
January, with a typical high of 3° and a low of -16°.
What is the hottest month in Big Delta?
July, with a typical high of 70° and a low of 46°.
How much snow does Big Delta get?
About 43 inches in a normal winter, most of it in November.
When is the first frost in Big Delta?
Frost is uncommon. Only 100% of years see a night at 32° or below.
What is the rainiest month in Big Delta?
July, with 2.8 inches of rain and melted snow. The year totals 13 inches.
NOAA’s gridded normals don’t cover this state, so temperatures and rainfall come from the nearest weather station. Snow, frost dates and day counts come from NOAA’s weather station at Delta 6 N, AK (2 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020.