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Grants Pass, Oregon climate
Csa Hot-summer Mediterranean
Grants Pass has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is July with an average daily high near 91°F, while the coldest is December averaging around 35°F at night. Precipitation totals about 31 inches a year and is strongly seasonal — December alone averages 6.5 inches while August barely receives 0.26 inches.
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 countsGrants Pass climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 54 | 60 | 65 | 74 | 81 | 91 | 91 | 84 | 70 | 54 | 46 |
| Avg temp (°F) | 42 | 45 | 48 | 53 | 60 | 66 | 73 | 73 | 66 | 56 | 46 | 40 |
| Avg low (°F) | 35 | 36 | 37 | 40 | 46 | 51 | 56 | 55 | 48 | 41 | 39 | 35 |
| Precipitation (in) | 5.1 | 4.0 | 3.7 | 2.3 | 1.4 | 0.7 | 0.4 | 0.3 | 0.6 | 2.1 | 4.4 | 6.6 |
| Snowfall (in) | 0.6 | 0.1 | 0.1 | — | — | — | — | — | — | — | — | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 54 | 60 | 65 | 74 | 81 |
| Avg temp (°F) | 42 | 45 | 48 | 53 | 60 | 66 |
| Avg low (°F) | 35 | 36 | 37 | 40 | 46 | 51 |
| Precipitation (in) | 5.1 | 4.0 | 3.7 | 2.3 | 1.4 | 0.7 |
| Snowfall (in) | 0.6 | 0.1 | 0.1 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 91 | 91 | 84 | 70 | 54 | 46 |
| Avg temp (°F) | 73 | 73 | 66 | 56 | 46 | 40 |
| Avg low (°F) | 56 | 55 | 48 | 41 | 39 | 35 |
| Precipitation (in) | 0.4 | 0.3 | 0.6 | 2.1 | 4.4 | 6.6 |
| Snowfall (in) | — | — | — | — | — | 0.1 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 17 | 14 | 15 | 13 | 8 | 5 | 2 | 2 | 3 | 8 | 15 | 16 |
| Days with high ≥ 90°F (days) | — | — | — | 0.4 | 3 | 6 | 17 | 18 | 9 | 0.6 | — | — |
| Days with low ≤ 32°F (days) | 11 | 11 | 9 | 4 | 0.8 | 0.1 | — | — | 0.4 | 4 | 6 | 11 |
| Days with snowfall ≥ 1 in (days) | 0.2 | 0.1 | 0.1 | — | — | — | — | — | — | — | — | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 17 | 14 | 15 | 13 | 8 | 5 |
| Days with high ≥ 90°F (days) | — | — | — | 0.4 | 3 | 6 |
| Days with low ≤ 32°F (days) | 11 | 11 | 9 | 4 | 0.8 | 0.1 |
| Days with snowfall ≥ 1 in (days) | 0.2 | 0.1 | 0.1 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 2 | 3 | 8 | 15 | 16 |
| Days with high ≥ 90°F (days) | 17 | 18 | 9 | 0.6 | — | — |
| Days with low ≤ 32°F (days) | — | — | 0.4 | 4 | 6 | 11 |
| Days with snowfall ≥ 1 in (days) | — | — | — | — | — | 0.1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 69 | 70 | 67 | 58 | 45 | 25 | 26 | 34 | 50 | 70 | 72 |
| Clear days (≤ 30% cloud) | 5 | 4 | 4 | 5 | 8 | 13 | 21 | 21 | 17 | 11 | 4 | 4 |
| Partly cloudy days (30–70%) | 8 | 7 | 8 | 7 | 9 | 8 | 6 | 7 | 7 | 9 | 7 | 8 |
| Cloudy days (≥ 70%) | 19 | 17 | 19 | 18 | 14 | 9 | 3 | 3 | 6 | 11 | 19 | 19 |
| Relative humidity (%) | 91 | 88 | 85 | 82 | 79 | 72 | 57 | 50 | 52 | 66 | 84 | 91 |
| Wind speed (mph) | 0.7 | 0.7 | 0.7 | 0.7 | 0.6 | 0.6 | 0.6 | 0.7 | 0.8 | 0.8 | 0.7 | 0.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 69 | 70 | 67 | 58 | 45 |
| Clear days (≤ 30% cloud) | 5 | 4 | 4 | 5 | 8 | 13 |
| Partly cloudy days (30–70%) | 8 | 7 | 8 | 7 | 9 | 8 |
| Cloudy days (≥ 70%) | 19 | 17 | 19 | 18 | 14 | 9 |
| Relative humidity (%) | 91 | 88 | 85 | 82 | 79 | 72 |
| Wind speed (mph) | 0.7 | 0.7 | 0.7 | 0.7 | 0.6 | 0.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 25 | 26 | 34 | 50 | 70 | 72 |
| Clear days (≤ 30% cloud) | 21 | 21 | 17 | 11 | 4 | 4 |
| Partly cloudy days (30–70%) | 6 | 7 | 7 | 9 | 7 | 8 |
| Cloudy days (≥ 70%) | 3 | 3 | 6 | 11 | 19 | 19 |
| Relative humidity (%) | 57 | 50 | 52 | 66 | 84 | 91 |
| Wind speed (mph) | 0.6 | 0.7 | 0.8 | 0.8 | 0.7 | 0.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Grants Pass (NOAA GHCN station USC00353445), about 2 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.