WeatherWX.com
Portland 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 38°F | Hi 59°F Lo 41°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 64°F Lo 48°F | Hi 52°F Lo 40°F | Hi 45°F Lo 35°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 |
| 6.6 in | 5 in | 6.1 in | 4.5 in | 2.5 in | 1.5 in | 0.2 in | 0.2 in | 2 in | 4.8 in | 6.6 in | 7.7 in |
| 82% | 82% | 80% | 76% | 71% | 68% | 62% | 61% | 66% | 72% | 80% | 83% |
| 58% | 59% | 58% | 55% | 46% | 39% | 22% | 21% | 31% | 42% | 56% | 59% |
| 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 |
| 17 | 15 | 17 | 19 | 24 | 25 | 30 | 30 | 26 | 22 | 17 | 17 |
| 13 | 11 | 13 | 11 | 7 | 5 | 1 | 1 | 4 | 9 | 13 | 13 |
| 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| 2 | 2 | 3 | 3 | 4 | 5 | 6 | 5 | 4 | 3 | 2 | 2 |
| 114 | 92 | 102 | 109 | 167 | 194 | 286 | 290 | 225 | 180 | 118 | 112 |
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 3°C | Hi 15°C Lo 5°C | Hi 20°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 18°C Lo 9°C | Hi 11°C Lo 5°C | Hi 7°C Lo 2°C |
| 9 km/h | 9 km/h | 8 km/h | 8 km/h | 7 km/h | 7 km/h | 7 km/h | 6 km/h | 7 km/h | 7 km/h | 9 km/h | 9 km/h |
| 167 mm | 128 mm | 156 mm | 113 mm | 64 mm | 39 mm | 6 mm | 5 mm | 51 mm | 121 mm | 168 mm | 196 mm |
| 82% | 82% | 80% | 76% | 71% | 68% | 62% | 61% | 66% | 72% | 80% | 83% |
| 58% | 59% | 58% | 55% | 46% | 39% | 22% | 21% | 31% | 42% | 56% | 59% |
| 1020 mb | 1019 mb | 1017 mb | 1018 mb | 1017 mb | 1017 mb | 1017 mb | 1016 mb | 1016 mb | 1018 mb | 1018 mb | 1019 mb |
| 17 | 15 | 17 | 19 | 24 | 25 | 30 | 30 | 26 | 22 | 17 | 17 |
| 13 | 11 | 13 | 11 | 7 | 5 | 1 | 1 | 4 | 9 | 13 | 13 |
| 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| 2 | 2 | 3 | 3 | 4 | 5 | 6 | 5 | 4 | 3 | 2 | 2 |
| 114 | 92 | 102 | 109 | 167 | 194 | 286 | 290 | 225 | 180 | 118 | 112 |
| 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.