WEATHER IN Portland
Monthly temperature
| Month | Record low | Average low | Average | Average high | Record high |
| january | -2 (1950) | 36.2 | 41.9 | 47.5 | 66 (2005) |
| february | -3 (1950) | 36.8 | 44.1 | 51.5 | 71 (1988) |
| march | 19 (1989) | 39.7 | 48.3 | 56.8 | 80 (1947) |
| april | 29 (1955) | 43.7 | 52.8 | 62.0 | 90 (1998) |
| may | 29 (1954) | 49.4 | 59.4 | 69.3 | 100 (1983) |
| june | 39 (1966) | 54.1 | 64.2 | 74.3 | 102 (2006) |
| july | 43 (1955) | 58.5 | 70.2 | 81.9 | 107 (1942) |
| august | 44 (1980) | 58.9 | 70.6 | 82.3 | 107 (1981) |
| september | 34 (1965) | 54.1 | 65.4 | 76.7 | 105 (1988) |
| october | 26 (1971) | 46.7 | 55.6 | 64.4 | 92 (1987) |
| november | 13 (1955) | 40.6 | 47.1 | 53.5 | 73 (1975) |
| december | 6 (1964) | 36.2 | 41.6 | 46.9 | 65 (1993) |
| year | -3 (1950) | 45.6 | 54.4 | 63.1 | 107 (1942) |
Monthly precipitation
| Month | Average | Record low | Record high | Daily high |
| january | 5.03 | 0.06 (1985) | 13.71 (1883) | 2.49 (2009) |
| february | 3.68 | 0.16 (1920) | 13.36 (1881) | 2.16 (1996) |
| march | 3.97 | 0.63 (1885) | 12.76 (1873) | 1.64 (2014) |
| april | 2.89 | 0.53 (1956) | 12.55 (1952) | 1.25 (1988) |
| may | 2.51 | 0.10 (1992) | 6.60 (1879) | 1.47 (1968) |
| june | 1.63 | 0.03 (1951) | 5.38 (1888) | 1.70 (1958) |
| july | 0.50 | 0.00 (1883) | 2.68 (1983) | 1.06 (1995) |
| august | 0.54 | 0.00 (1885) | 4.53 (1968) | 1.47 (1977) |
| september | 1.52 | 0.00 (1873) | 5.52 (1927) | 2.23 (1969) |
| october | 3.42 | 0.00 (1895) | 11.63 (1882) | 2.44 (1994) |
| november | 5.45 | 0.36 (1936) | 15.77 (1875) | 2.69 (1996) |
| december | 5.77 | 0.88 (1876) | 20.14 (1882) | 2.17 (1942) |
| year | 36.03 | 22.48 (1985) | 67.24 (1882) | 2.69 (1996) |
Number of days with solid, liquid, and mixed precipitation
| Type of precipitation | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Wind speed, m/s
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different wind directions, %
| direction | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Air humidity, %
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Snow cover
| Month | jul | aug | sep | oct | nov | dec | jan | feb | mar | apr | may | jun | Year |
| number of days | |||||||||||||
| height (sm) | |||||||||||||
| max height (sm) |
Cloudy, score
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| total | |||||||||||||
| low |
Number of clear, cloudy and cloudy days
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| Total cloud | |||||||||||||
| Low cloud | |||||||||||||
Number of days with different phenomena
| phenomenon | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different types of clouds, %
| type of clouds | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |