Knappa, OR climate
Knappa has mild winters and cool summers, with plenty of rain. A typical July afternoon reaches 70°, a January night drops to 37°, and about 2 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Knappa feels like
Winter
Spring
Summer
Fall
Knappa 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 | 49° | 37° | 12.7" | 1.0" | 22 | 1 | 37° – 47° |
| February | 51° | 36° | 8.7" | 0.3" | 19 | 0 | 38° – 49° |
| March | 54° | 38° | 9.5" | 0.1" | 22 | 0 | 42° – 50° |
| April | 57° | 40° | 6.8" | 0 | 20 | 0 | 44° – 54° |
| May | 62° | 45° | 4.1" | 0 | 16 | 0 | 50° – 57° |
| June | 66° | 49° | 2.9" | 0 | 14 | 0 | 54° – 61° |
| July | 70° | 52° | 1.0" | 0 | 8 | 0 | 58° – 64° |
| August | 71° | 52° | 1.4" | 0 | 7 | 0 | 59° – 64° |
| September | 68° | 49° | 3.4" | 0 | 11 | 0 | 56° – 62° |
| October | 61° | 44° | 8.0" | 0 | 17 | 0 | 49° – 57° |
| November | 53° | 39° | 12.9" | 0 | 22 | 0 | 41° – 51° |
| December | 48° | 36° | 13.2" | 0.3" | 23 | 0 | 38° – 46° |
| Year | 59° | 43° | 84.5" | 1.7" | 201 | 1 |
“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 Knappa
Knappa gets 84 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 201 days a year.
About 233 frost-free days a year
In half of years the last 32° night comes by March 30 and the first one by November 18. That leaves about 233 frost-free days for gardens, longer than 87% of U.S. towns.
Heating and cooling a home in Knappa
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Knappa, 99% of that work is heating and 1% 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 Knappa 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 Knappa averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.7°). The shift is larger than in 52% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Knappa’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 38° to 49°. August is the most reliable, staying within 5°.
Common questions about Knappa’s climate
What is the coldest month in Knappa?
February, with a typical high of 51° and a low of 36°.
What is the hottest month in Knappa?
August, with a typical high of 71° and a low of 52°. About 1 days a year reach 90°.
How much snow does Knappa get?
About 2 inches in a normal winter, most of it in January.
When is the first frost in Knappa?
In half of years the first 32° night comes by November 18, and the last spring frost by March 30.
What is the rainiest month in Knappa?
December, with 13.2 inches of rain and melted snow. The year totals 84 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Knappa itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Naselle 2 Ene, WA (16 mi, snow) and Ft Clatsop Natl Mem, OR (14 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.