WeatherWX.com
Portland Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 27°F Lo 15°F | Hi 30°F Lo 18°F | Hi 46°F Lo 32°F | Hi 57°F Lo 41°F | Hi 70°F Lo 53°F | Hi 79°F Lo 61°F | Hi 81°F Lo 64°F | Hi 80°F Lo 62°F | Hi 76°F Lo 55°F | Hi 61°F Lo 45°F | Hi 47°F Lo 33°F | Hi 35°F Lo 24°F |
| 10 mph | 10 mph | 10 mph | 11 mph | 9 mph | 8 mph | 7 mph | 7 mph | 8 mph | 10 mph | 10 mph | 10 mph |
| 2.4 in | 2.8 in | 4.2 in | 6.1 in | 8.4 in | 7.2 in | 5.4 in | 4.5 in | 3.8 in | 4.8 in | 3.5 in | 2.8 in |
| 85% | 83% | 76% | 74% | 77% | 81% | 84% | 81% | 76% | 71% | 73% | 79% |
| 58% | 56% | 48% | 49% | 43% | 31% | 30% | 28% | 28% | 39% | 40% | 52% |
| 30.1 in | 30.1 in | 30.1 in | 29.9 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 13 | 12 | 18 | 19 | 21 | 21 | 24 | 25 | 25 | 24 | 21 | 16 |
| 4 | 3 | 7 | 9 | 10 | 9 | 7 | 6 | 5 | 6 | 5 | 5 |
| 14 | 13 | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 10 |
| 3 | 2 | 2 | 2 | 2 | 2 | 5 | 6 | 5 | 1 | 1 | 2 |
| 1 | 2 | 2 | 4 | 5 | 6 | 6 | 5 | 4 | 2 | 1 | 1 |
| 211 | 195 | 259 | 243 | 279 | 310 | 334 | 338 | 315 | 273 | 269 | 240 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi -3°C Lo -10°C | Hi -1°C Lo -8°C | Hi 8°C Lo 0°C | Hi 14°C Lo 5°C | Hi 21°C Lo 12°C | Hi 26°C Lo 16°C | Hi 27°C Lo 18°C | Hi 27°C Lo 17°C | Hi 24°C Lo 13°C | Hi 16°C Lo 7°C | Hi 8°C Lo 1°C | Hi 2°C Lo -4°C |
| 16 km/h | 17 km/h | 17 km/h | 17 km/h | 15 km/h | 13 km/h | 11 km/h | 11 km/h | 13 km/h | 15 km/h | 16 km/h | 16 km/h |
| 62 mm | 72 mm | 106 mm | 156 mm | 212 mm | 183 mm | 137 mm | 115 mm | 97 mm | 122 mm | 89 mm | 71 mm |
| 85% | 83% | 76% | 74% | 77% | 81% | 84% | 81% | 76% | 71% | 73% | 79% |
| 58% | 56% | 48% | 49% | 43% | 31% | 30% | 28% | 28% | 39% | 40% | 52% |
| 1020 mb | 1020 mb | 1018 mb | 1014 mb | 1014 mb | 1013 mb | 1015 mb | 1015 mb | 1017 mb | 1016 mb | 1019 mb | 1019 mb |
| 13 | 12 | 18 | 19 | 21 | 21 | 24 | 25 | 25 | 24 | 21 | 16 |
| 4 | 3 | 7 | 9 | 10 | 9 | 7 | 6 | 5 | 6 | 5 | 5 |
| 14 | 13 | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 10 |
| 3 | 2 | 2 | 2 | 2 | 2 | 5 | 6 | 5 | 1 | 1 | 2 |
| 1 | 2 | 2 | 4 | 5 | 6 | 6 | 5 | 4 | 2 | 1 | 1 |
| 211 | 195 | 259 | 243 | 279 | 310 | 334 | 338 | 315 | 273 | 269 | 240 |
| 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.
