Climate normals · 1970–2000
Portland Climate
Portland is a city in United States (OR) with a population of about 652,503. Its average annual temperature is 11.4°C (53°F), with roughly 1139 mm of rain per year.
11.4°C
Avg Temp
1139
Precip (mm/yr)
Aug
Hottest Month
Dec
Coldest Month
Portland Climate
Portland has an average annual temperature of 11.4°C (53°F) and receives about 1139 mm of precipitation per year. The warmest month is August and the coldest is December. Figures are 1970–2000 climate normals.
11.4°C
Avg Temp
1139
Precip (mm/yr)
Aug
Hottest Month
Dec
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 4° / 40° | 168 mm |
| February | 6° / 43° | 132 mm |
| March | 8° / 47° | 115 mm |
| April | 10° / 50° | 82 mm |
| May | 13° / 56° | 64 mm |
| June | 16° / 61° | 45 mm |
| July | 19° / 66° | 20 mm |
| August | 19° / 66° | 26 mm |
| September | 17° / 62° | 49 mm |
| October | 12° / 53° | 87 mm |
| November | 7° / 45° | 169 mm |
| December | 4° / 40° | 182 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Portland
The most comfortable months to visit Portland are typically July, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 26°C high). The coldest is December (near 1°C low). December is usually the wettest month.
Where to stay near Portland
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Frequently Asked Questions
The most comfortable months to visit Portland are typically July, August and September, when temperatures are mildest and rainfall is relatively low (1970–2000 climate normals).
Portland, United States has an average annual temperature of 11.4°C and about 1139 mm of precipitation per year. The warmest month is August and the coldest is December.
In August, the hottest month, daily highs in Portland average about 26°C (79°F).
Monthly climate normals (1970–2000) sampled from WorldClim 2.1 at ~9 km resolution. Humidity derived from vapor pressure. City coordinates and population from GeoNames.