Weather World
Willamette Stone State Park Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 47°F Lo 36°F | Hi 48°F Lo 36°F | Hi 53°F Lo 39°F | Hi 59°F Lo 42°F | Hi 67°F Lo 47°F | Hi 74°F Lo 52°F | Hi 83°F Lo 57°F | Hi 84°F Lo 59°F | Hi 76°F Lo 55°F | Hi 63°F Lo 48°F | Hi 52°F Lo 41°F | Hi 45°F Lo 36°F |
| 5 mph | 5 mph | 5 mph | 5 mph | 4 mph | 4 mph | 4 mph | 4 mph | 4 mph | 5 mph | 5 mph | 5 mph |
| 6.7 in | 6.1 in | 6.3 in | 4.4 in | 2.5 in | 1.6 in | 0.2 in | 0.4 in | 2.1 in | 4.8 in | 7.4 in | 9.3 in |
| 83% | 83% | 80% | 76% | 71% | 67% | 62% | 61% | 65% | 73% | 81% | 84% |
| 60% | 62% | 61% | 56% | 46% | 38% | 22% | 23% | 32% | 44% | 59% | 62% |
| 30.1 in | 30.1 in | 30.0 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 18 | 15 | 17 | 20 | 25 | 26 | 30 | 30 | 26 | 22 | 17 | 17 |
| 12 | 11 | 13 | 10 | 6 | 4 | 1 | 1 | 4 | 9 | 13 | 13 |
| 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 2 | 2 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 2 |
| 2 | 2 | 3 | 3 | 4 | 5 | 6 | 5 | 4 | 3 | 2 | 2 |
| 111 | 85 | 94 | 111 | 153 | 182 | 268 | 282 | 221 | 167 | 109 | 102 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 8°C Lo 2°C | Hi 9°C Lo 2°C | Hi 12°C Lo 4°C | Hi 15°C Lo 5°C | Hi 19°C Lo 8°C | Hi 23°C Lo 11°C | Hi 28°C Lo 14°C | Hi 29°C Lo 15°C | Hi 24°C Lo 13°C | Hi 17°C Lo 9°C | Hi 11°C Lo 5°C | Hi 7°C Lo 2°C |
| 8 km/h | 9 km/h | 8 km/h | 8 km/h | 7 km/h | 7 km/h | 7 km/h | 6 km/h | 6 km/h | 7 km/h | 8 km/h | 8 km/h |
| 170 mm | 154 mm | 160 mm | 112 mm | 64 mm | 40 mm | 5 mm | 11 mm | 53 mm | 121 mm | 188 mm | 237 mm |
| 83% | 83% | 80% | 76% | 71% | 67% | 62% | 61% | 65% | 73% | 81% | 84% |
| 60% | 62% | 61% | 56% | 46% | 38% | 22% | 23% | 32% | 44% | 59% | 62% |
| 1020 mb | 1019 mb | 1017 mb | 1018 mb | 1017 mb | 1017 mb | 1017 mb | 1016 mb | 1016 mb | 1017 mb | 1018 mb | 1019 mb |
| 18 | 15 | 17 | 20 | 25 | 26 | 30 | 30 | 26 | 22 | 17 | 17 |
| 12 | 11 | 13 | 10 | 6 | 4 | 1 | 1 | 4 | 9 | 13 | 13 |
| 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 2 | 2 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 2 |
| 2 | 2 | 3 | 3 | 4 | 5 | 6 | 5 | 4 | 3 | 2 | 2 |
| 111 | 85 | 94 | 111 | 153 | 182 | 268 | 282 | 221 | 167 | 109 | 102 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.