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Sheridan, Oregon climate
Csb Warm-summer Mediterranean
Sheridan has a seasonal cool-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is August with an average daily high near 82°F, while the coldest is December averaging around 33°F at night. Precipitation totals about 47 inches a year and is strongly seasonal — December alone averages 8.7 inches while July barely receives 0.32 inches. Snow is occasional (3 inches of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsSheridan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 49 | 55 | 60 | 68 | 73 | 81 | 82 | 76 | 63 | 51 | 44 |
| Avg temp (°F) | 39 | 41 | 45 | 50 | 57 | 61 | 68 | 68 | 62 | 52 | 44 | 38 |
| Avg low (°F) | 33 | 33 | 36 | 39 | 45 | 50 | 54 | 54 | 49 | 42 | 36 | 33 |
| Precipitation (in) | 7.2 | 5.8 | 5.0 | 3.3 | 2.2 | 1.4 | 0.3 | 0.5 | 1.3 | 3.7 | 7.2 | 8.7 |
| Snowfall (in) | 0.6 | 0.6 | — | — | — | — | — | — | — | 0.2 | — | 1.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 49 | 55 | 60 | 68 | 73 |
| Avg temp (°F) | 39 | 41 | 45 | 50 | 57 | 61 |
| Avg low (°F) | 33 | 33 | 36 | 39 | 45 | 50 |
| Precipitation (in) | 7.2 | 5.8 | 5.0 | 3.3 | 2.2 | 1.4 |
| Snowfall (in) | 0.6 | 0.6 | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 81 | 82 | 76 | 63 | 51 | 44 |
| Avg temp (°F) | 68 | 68 | 62 | 52 | 44 | 38 |
| Avg low (°F) | 54 | 54 | 49 | 42 | 36 | 33 |
| Precipitation (in) | 0.3 | 0.5 | 1.3 | 3.7 | 7.2 | 8.7 |
| Snowfall (in) | — | — | — | 0.2 | — | 1.3 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 16 | 13 | 16 | 14 | 10 | 7 | 2 | 3 | 5 | 11 | 15 | 16 |
| Days with high ≥ 90°F (days) | — | — | — | — | 1 | 2 | 7 | 8 | 3 | 0.1 | — | — |
| Days with low ≤ 32°F (days) | 13 | 12 | 8 | 3 | 0.2 | 0.0 | — | 0.0 | — | 2 | 9 | 12 |
| Days with snowfall ≥ 1 in (days) | 0.2 | 0.1 | — | — | — | — | — | — | — | 0.0 | — | 0.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 16 | 13 | 16 | 14 | 10 | 7 |
| Days with high ≥ 90°F (days) | — | — | — | — | 1 | 2 |
| Days with low ≤ 32°F (days) | 13 | 12 | 8 | 3 | 0.2 | 0.0 |
| Days with snowfall ≥ 1 in (days) | 0.2 | 0.1 | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 3 | 5 | 11 | 15 | 16 |
| Days with high ≥ 90°F (days) | 7 | 8 | 3 | 0.1 | — | — |
| Days with low ≤ 32°F (days) | — | 0.0 | — | 2 | 9 | 12 |
| Days with snowfall ≥ 1 in (days) | — | — | — | 0.0 | — | 0.3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 74 | 76 | 75 | 70 | 64 | 43 | 43 | 49 | 63 | 75 | 78 |
| Clear days (≤ 30% cloud) | 3 | 4 | 3 | 3 | 5 | 6 | 13 | 13 | 12 | 7 | 3 | 2 |
| Partly cloudy days (30–70%) | 7 | 5 | 6 | 6 | 7 | 9 | 10 | 10 | 7 | 7 | 6 | 6 |
| Cloudy days (≥ 70%) | 21 | 19 | 22 | 21 | 19 | 15 | 8 | 8 | 11 | 17 | 21 | 22 |
| Relative humidity (%) | 94 | 91 | 89 | 86 | 84 | 82 | 77 | 74 | 76 | 84 | 92 | 94 |
| Wind speed (mph) | 1.4 | 1.4 | 1.4 | 1.3 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.3 | 1.4 | 1.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 74 | 76 | 75 | 70 | 64 |
| Clear days (≤ 30% cloud) | 3 | 4 | 3 | 3 | 5 | 6 |
| Partly cloudy days (30–70%) | 7 | 5 | 6 | 6 | 7 | 9 |
| Cloudy days (≥ 70%) | 21 | 19 | 22 | 21 | 19 | 15 |
| Relative humidity (%) | 94 | 91 | 89 | 86 | 84 | 82 |
| Wind speed (mph) | 1.4 | 1.4 | 1.4 | 1.3 | 1.2 | 1.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 43 | 43 | 49 | 63 | 75 | 78 |
| Clear days (≤ 30% cloud) | 13 | 13 | 12 | 7 | 3 | 2 |
| Partly cloudy days (30–70%) | 10 | 10 | 7 | 7 | 6 | 6 |
| Cloudy days (≥ 70%) | 8 | 8 | 11 | 17 | 21 | 22 |
| Relative humidity (%) | 77 | 74 | 76 | 84 | 92 | 94 |
| Wind speed (mph) | 1.2 | 1.2 | 1.2 | 1.3 | 1.4 | 1.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Forest Grove (NOAA GHCN station USC00352997), about 53 km from the city centre.
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.