Cascade Locks, OR climate
Cascade Locks has mild winters and pleasant summers. A typical July afternoon reaches 82°, a January night drops to 33°, and about 10 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Cascade Locks feels like
Winter
Spring
Summer
Fall
Cascade Locks 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 | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 43° | 33° | 6.3" | 3.5" | 22 | 2 | 31° – 42° |
| February | 48° | 34° | 4.5" | 3.4" | 18 | 2 | 34° – 47° |
| March | 55° | 37° | 4.2" | 0.3" | 20 | 0 | 42° – 52° |
| April | 61° | 40° | 2.9" | 0 | 19 | 0 | 46° – 57° |
| May | 69° | 46° | 1.9" | 0 | 15 | 0 | 53° – 63° |
| June | 74° | 51° | 1.4" | 0 | 11 | 0 | 59° – 70° |
| July | 82° | 55° | 0.3" | 0 | 4 | 0 | 62° – 72° |
| August | 83° | 55° | 0.5" | 0 | 4 | 0 | 64° – 72° |
| September | 76° | 49° | 1.2" | 0 | 8 | 0 | 59° – 66° |
| October | 64° | 42° | 3.7" | 0 | 15 | 0 | 48° – 58° |
| November | 50° | 37° | 6.6" | 0.2" | 21 | 0 | 39° – 49° |
| December | 42° | 33° | 7.1" | 2.9" | 22 | 2 | 33° – 40° |
| Year | 62° | 43° | 40.6" | 10.3" | 179 | 6 |
“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 Cascade Locks
Cascade Locks gets 41 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 179 days a year. Snow covers the ground about 6 days of the year.
About 242 frost-free days a year
In half of years the last 32° night comes by March 24 and the first one by November 20. That leaves about 242 frost-free days for gardens, longer than 89% of U.S. towns.
Heating and cooling a home in Cascade Locks
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Cascade Locks, 93% of that work is heating and 7% 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.
How Cascade Locks 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 Cascade Locks averaged 1.2° warmer than the 1900s. The biggest change is in January (+3.3°). The shift is smaller than in 53% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Cascade Locks’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 34° to 47°. September is the most reliable, staying within 7°.
Common questions about Cascade Locks’s climate
What is the coldest month in Cascade Locks?
December, with a typical high of 42° and a low of 33°.
What is the hottest month in Cascade Locks?
August, with a typical high of 83° and a low of 55°. About 17 days a year reach 90°.
How much snow does Cascade Locks get?
About 10 inches in a normal winter, most of it in January.
When is the first frost in Cascade Locks?
In half of years the first 32° night comes by November 20, and the last spring frost by March 24.
What is the rainiest month in Cascade Locks?
December, with 7.1 inches of rain and melted snow. The year totals 41 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Cascade Locks itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bonneville Dam, OR (5 mi, snow) and Cascade Locks, OR (1 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.