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Pendleton, Oregon climate
BSk Cold semi-arid
Pendleton has a seasonal cool-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 91°F, while the coldest is December averaging around 27°F at night. Precipitation totals about 13 inches a year and is strongly seasonal — December alone averages 1.5 inches while July barely receives 0.29 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Pendleton climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 44 | 49 | 57 | 64 | 73 | 81 | 91 | 90 | 80 | 66 | 52 | 43 |
| Avg temp (°F) | 36 | 39 | 45 | 51 | 59 | 65 | 73 | 73 | 64 | 53 | 42 | 35 |
| Avg low (°F) | 28 | 29 | 33 | 37 | 44 | 50 | 56 | 55 | 49 | 39 | 32 | 27 |
| Precipitation (in) | 1.5 | 1.2 | 1.4 | 1.2 | 1.4 | 1.1 | 0.3 | 0.3 | 0.5 | 1.1 | 1.4 | 1.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 44 | 49 | 57 | 64 | 73 | 81 |
| Avg temp (°F) | 36 | 39 | 45 | 51 | 59 | 65 |
| Avg low (°F) | 28 | 29 | 33 | 37 | 44 | 50 |
| Precipitation (in) | 1.5 | 1.2 | 1.4 | 1.2 | 1.4 | 1.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 91 | 90 | 80 | 66 | 52 | 43 |
| Avg temp (°F) | 73 | 73 | 64 | 53 | 42 | 35 |
| Avg low (°F) | 56 | 55 | 49 | 39 | 32 | 27 |
| Precipitation (in) | 0.3 | 0.3 | 0.5 | 1.1 | 1.4 | 1.5 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 69 | 69 | 65 | 60 | 50 | 29 | 29 | 39 | 56 | 70 | 73 |
| Relative humidity (%) | 81 | 76 | 70 | 67 | 63 | 59 | 50 | 47 | 50 | 61 | 72 | 80 |
| Wind speed (mph) | 7.1 | 6.5 | 6.0 | 5.8 | 5.3 | 5.5 | 5.2 | 5.1 | 4.9 | 5.4 | 6.6 | 7.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 69 | 69 | 65 | 60 | 50 |
| Relative humidity (%) | 81 | 76 | 70 | 67 | 63 | 59 |
| Wind speed (mph) | 7.1 | 6.5 | 6.0 | 5.8 | 5.3 | 5.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 29 | 29 | 39 | 56 | 70 | 73 |
| Relative humidity (%) | 50 | 47 | 50 | 61 | 72 | 80 |
| Wind speed (mph) | 5.2 | 5.1 | 4.9 | 5.4 | 6.6 | 7.0 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Eastern OR Regional AT Pendleton AP, a weather station, about 5 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.