Weather forecast March 22, 2023 - P8

Climate and Average Weather Year Round in Portland Oregon, United States

In Portland, the summers are short, warm, dry, and mostly clear and the winters are very cold, wet, and overcast. Over the course of the year, the temperature typically varies from 36°F to 84°F and is rarely below 26°F or above 95°F.

Based on the tourism score, the best time of year to visit Portland for warm-weather activities is from early July to late August.

Average Temperature in Portland 

The warm season lasts for 2.9 months, from June 23 to September 19, with an average daily high temperature above 76°F. The hottest month of the year in Portland is August, with an average high of 83°F and low of 57°F.

The cool season lasts for 3.2 months, from November 15 to February 22, with an average daily high temperature below 52°F. The coldest month of the year in Portland is December, with an average low of 36°F and high of 45°F.

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Portland experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Portland. The month with the most rain in Portland is November, with an average rainfall of 8.8 inches.

The month with the least rain in Portland is July, with an average rainfall of 0.5 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Portland experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 2.6 months, from November 30 to February 16, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Portland is January, with an average snowfall of 2.4 inches.

The snowless period of the year lasts for 9.5 months, from February 16 to November 30. The least snow falls around July 19, with an average total accumulation of 0.0 inches.

Weather forecast March 22, 2023

Weather 97229

High temperature : 47°F

Low temperature : 36°F

- Overcast clouds, Wind speed 4.61 mph, wind out of the NW. Visibility 7 mi, humidity 87% . Chance of Rain : 0 % .

Today's Air Quality - Weather 97229 : Good

- Air Quality Index : CO : 283.72 ; NH3 : 0.38 ; NO : 0 ; NO2 : 8.65 ; O3 : 52.93 ; PM10 : 6.89 ; PM2.5 : 5.14 ; SO2 : 1.01

Weather 97230

High temperature : 47°F

Low temperature : 36°F

- Overcast clouds, Wind speed 4.61 mph, wind out of the NW. Visibility 7 mi, humidity 86% . Chance of Rain : 0 % .

Today's Air Quality - Weather 97230 : Good

- Air Quality Index : CO : 313.76 ; NH3 : 0.6 ; NO : 0.04 ; NO2 : 15.42 ; O3 : 29.68 ; PM10 : 6.09 ; PM2.5 : 3.74 ; SO2 : 0.67

Weather 97231

High temperature : 47°F

Low temperature : 36°F

- Overcast clouds, Wind speed 4.61 mph, wind out of the NW. Visibility 7 mi, humidity 86% . Chance of Rain : 0 % .

Today's Air Quality - Weather 97231 : Good

- Air Quality Index : CO : 287.06 ; NH3 : 0.15 ; NO : 0 ; NO2 : 8.57 ; O3 : 47.92 ; PM10 : 8.22 ; PM2.5 : 6.29 ; SO2 : 0.95

Weather 97232

High temperature : 47°F

Low temperature : 36°F

- Overcast clouds, Wind speed 4.61 mph, wind out of the NW. Visibility 7 mi, humidity 86% . Chance of Rain : 0 % .

Today's Air Quality - Weather 97232 : Good

- Air Quality Index : CO : 293.73 ; NH3 : 0.48 ; NO : 0 ; NO2 : 12.85 ; O3 : 38.27 ; PM10 : 7.91 ; PM2.5 : 5.46 ; SO2 : 1.19

Weather 45238

High temperature : 49°F

Low temperature : 46°F

- Overcast clouds, Wind speed 4.61 mph, wind out of the N. Visibility 7 mi, humidity 88% . Chance of Rain : 100 % .

Today's Air Quality - Weather 45238 : Moderate

- Air Quality Index : CO : 260.35 ; NH3 : 0.5 ; NO : 0.22 ; NO2 : 3.64 ; O3 : 81.54 ; PM10 : 5.9 ; PM2.5 : 5.38 ; SO2 : 1.22

Weather 97236

High temperature : 46°F

Low temperature : 35°F

- Overcast clouds, Wind speed 7 mph, wind out of the N. Visibility 7 mi, humidity 86% . Chance of Rain : 0 % .

Today's Air Quality - Weather 97236 : Good

- Air Quality Index : CO : 313.76 ; NH3 : 0.6 ; NO : 0.04 ; NO2 : 15.42 ; O3 : 29.68 ; PM10 : 6.09 ; PM2.5 : 3.74 ; SO2 : 0.67

Weather 97238

High temperature : 48°F

Low temperature : 37°F

- Overcast clouds, Wind speed 4.61 mph, wind out of the NW. Visibility 7 mi, humidity 86% . Chance of Rain : 0 % .

Today's Air Quality - Weather 97238 : Good

- Air Quality Index : CO : 313.76 ; NH3 : 0.6 ; NO : 0.04 ; NO2 : 15.42 ; O3 : 29.68 ; PM10 : 6.09 ; PM2.5 : 3.74 ; SO2 : 0.67

Weather 97239

High temperature : 46°F

Low temperature : 35°F

- Overcast clouds, Wind speed 4.61 mph, wind out of the NW. Visibility 7 mi, humidity 87% . Chance of Rain : 0 % .

Today's Air Quality - Weather 97239 : Good

- Air Quality Index : CO : 293.73 ; NH3 : 0.48 ; NO : 0 ; NO2 : 12.85 ; O3 : 38.27 ; PM10 : 7.91 ; PM2.5 : 5.46 ; SO2 : 1.19

Weather 10011

High temperature : 47°F

Low temperature : 38°F

- Overcast clouds, Wind speed 11.01 mph, wind out of the N. Visibility 7 mi, humidity 51% . Chance of Rain : 0 % .

Today's Air Quality - Weather 10011 : Poor

- Air Quality Index : CO : 674.25 ; NH3 : 2.19 ; NO : 21.91 ; NO2 : 72.66 ; O3 : 0.03 ; PM10 : 50.76 ; PM2.5 : 42.21 ; SO2 : 5.6

Weather 97242

High temperature : 48°F

Low temperature : 37°F

- Overcast clouds, Wind speed 7 mph, wind out of the N. Visibility 7 mi, humidity 86% . Chance of Rain : 0 % .

Today's Air Quality - Weather 97242 : Good

- Air Quality Index : CO : 293.73 ; NH3 : 0.48 ; NO : 0 ; NO2 : 12.85 ; O3 : 38.27 ; PM10 : 7.91 ; PM2.5 : 5.46 ; SO2 : 1.19