Heppner, OR climate
Heppner has chilly winters and warm summers, with very little rain. A typical July afternoon reaches 87°, a January night drops to 28°, and about 13 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Heppner feels like
Winter
Spring
Summer
Fall
Heppner 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° | 28° | 1.4" | 3.0" | 11 | 5 | 26° – 40° |
| February | 47° | 28° | 1.2" | 3.4" | 10 | 3 | 29° – 45° |
| March | 54° | 32° | 1.4" | 0.9" | 12 | 1 | 37° – 49° |
| April | 61° | 36° | 1.6" | 0.1" | 11 | 0 | 43° – 54° |
| May | 69° | 42° | 1.9" | 0 | 10 | 0 | 50° – 60° |
| June | 77° | 48° | 1.4" | 0 | 7 | 0 | 58° – 70° |
| July | 87° | 53° | 0.3" | 0 | 3 | 0 | 61° – 74° |
| August | 86° | 52° | 0.4" | 0 | 2 | 0 | 64° – 73° |
| September | 77° | 45° | 0.5" | 0 | 4 | 0 | 58° – 65° |
| October | 64° | 37° | 1.3" | 0.2" | 9 | 0 | 44° – 56° |
| November | 50° | 31° | 1.5" | 0.9" | 12 | 1 | 35° – 47° |
| December | 42° | 27° | 1.4" | 4.3" | 12 | 4 | 28° – 38° |
| Year | 63° | 38° | 14.1" | 12.8" | 102 | 15 |
“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 Heppner
Heppner gets 14 inches of rain and melted snow a year. May is the wettest month and July the driest. Rain or snow falls on about 102 days a year. Snow covers the ground about 15 days of the year.
About 174 frost-free days a year
In half of years the last 32° night comes by April 26 and the first one by October 19. That leaves about 174 frost-free days for gardens, shorter than 56% of U.S. towns.
Heating and cooling a home in Heppner
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Heppner, 91% of that work is heating and 9% 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 Heppner 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 Heppner averaged 1.7° warmer than the 1900s. The biggest change is in January (+4.4°). The shift is larger than in 84% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Heppner’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 29° to 45°. September is the most reliable, staying within 8°.
Common questions about Heppner’s climate
What is the coldest month in Heppner?
December, with a typical high of 42° and a low of 27°.
What is the hottest month in Heppner?
July, with a typical high of 87° and a low of 53°. About 28 days a year reach 90°.
How much snow does Heppner get?
About 13 inches in a normal winter, most of it in December.
When is the first frost in Heppner?
In half of years the first 32° night comes by October 19, and the last spring frost by April 26.
What is the rainiest month in Heppner?
May, with 1.9 inches of rain and melted snow. The year totals 14 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Heppner itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Heppner, OR (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.