Sunnyslope, WA climate
Sunnyslope has chilly, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 83°, a January night drops to 23°, and about 40 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Sunnyslope feels like
Winter
Spring
Summer
Fall
Sunnyslope 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 33° | 23° | 2.7" | 11.8" | 11 | 20° – 33° |
| February | 40° | 25° | 1.7" | 5.4" | 9 | 23° – 39° |
| March | 49° | 30° | 1.7" | 1.4" | 8 | 35° – 46° |
| April | 58° | 36° | 1.2" | 0 | 5 | 41° – 54° |
| May | 67° | 43° | 1.3" | 0 | 6 | 50° – 61° |
| June | 74° | 49° | 0.9" | 0 | 5 | 58° – 70° |
| July | 83° | 56° | 0.4" | 0 | 2 | 62° – 74° |
| August | 83° | 56° | 0.4" | 0 | 2 | 64° – 73° |
| September | 74° | 49° | 0.6" | 0 | 3 | 59° – 67° |
| October | 58° | 39° | 1.7" | 0.1" | 7 | 43° – 54° |
| November | 42° | 29° | 2.5" | 4.3" | 10 | 30° – 42° |
| December | 32° | 22° | 2.9" | 16.5" | 11 | 21° – 32° |
| Year | 58° | 38° | 18.0" | 39.5" | 78 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Sunnyslope
Sunnyslope gets 18 inches of rain and melted snow a year. December is the wettest month and August the driest. Rain or snow falls on about 78 days a year.
About 200 frost-free days a year
In half of years the last 32° night comes by April 8 and the first one by October 24. That leaves about 200 frost-free days for gardens, longer than 72% of U.S. towns.
Heating and cooling a home in Sunnyslope
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Sunnyslope, 88% of that work is heating and 12% 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.
Sunnyslope and its neighbors
Sunnyslope borders 1 town with climate data. January nights across them vary by 3.1°. Wenatchee has both the coldest January nights (26°) and the hottest July afternoons (89°). Sunnyslope’s January low is 23° and its July high 83°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Sunnyslope compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Sunnyslope averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.8°). The shift is larger than in 58% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Sunnyslope’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 23° to 39°. September is the most reliable, staying within 9°.
Common questions about Sunnyslope’s climate
What is the coldest month in Sunnyslope?
December, with a typical high of 32° and a low of 22°.
What is the hottest month in Sunnyslope?
July, with a typical high of 83° and a low of 56°. About 35 days a year reach 90°.
How much snow does Sunnyslope get?
About 40 inches in a normal winter, most of it in December.
When is the first frost in Sunnyslope?
In half of years the first 32° night comes by October 24, and the last spring frost by April 8.
What is the rainiest month in Sunnyslope?
December, with 2.9 inches of rain and melted snow. The year totals 18 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Sunnyslope itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Entiat Fish Hatchery, WA (13 mi, snow) and Wenatchee Pangborn Airport, WA (10 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.