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Portland, Oregon Climate & Temperature

⛺ Portland, Oregon has a warm mediterranean/ dry-summer subtropical climate that is mild with dry, warm summers and moderate seasonality. Regions with this subtype of the Mediterranean climate closely resemble an oceanic climate with generally cloudier and damper conditions than typical Mediterranean climates tho they are still susceptible to fire in the warm dry summer months. (Köppen-Geiger classification: Csb)Mediterranean warm climate (Csb)

⛳ Portland, Oregon is situated in or near the warm temperate moist forest biome.

🌡️ The average temperature is 12 degrees Celsius (53.6 degrees Fahrenheit). See the temperatures page for a monthly breakdown and the fixed scale graph.

🐬 Average monthly temperatures vary by 16.1 °C (29°F). This indicates that the continentality type is oceanic, subtype truly oceanic.

☔ Total annual precipitation averages 921.9 mm (36.3 inches) which is equivalent to 921.9 Litres/m² (22.61 Gallons/ft²).

Portland, Oregon Climate Graph

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In the winter time records indicate temperatures by day reach 8.5°C (47.4°F) on average falling to 1.6°C (34.9°F) overnight.

In spring time temperatures climb reaching 16.2°C (61.2°F) generally in the afternoon with overnight lows of 5.7°C (42.3°F).

During summer average high temperatures are 25.6°C (78°F) and average low temperatures are 13°C (55.4°F).

Come autumn/ fall temperatures decrease achieving average highs of 17.6°C (63.7°F) during the day and lows of 7.5°C (45.5°F) generally shortly after sunrise.

✨ The longest day of the year is 15:30 long on the 22 of June and the shortest day is 8:29 long on the 21 of December.

🌞 On average there are 1953 hours of sunshine per year. Visit the sunshine and daylight section to check monthly details including how high in the sky the sun reaches each month.

🐇Were you to burrow down through the centre of the Earth from Portland, Oregon you would pop up nearest to the climate station at Port-Aux-Francais, kerguelen islands, French Southern Lands where you would find a Tundra climate (Boreal rain forest biome).

🌍Portland, Oregon, Usa is at 45°36'N, 122°35'W, 12 m (39 ft). Check the location on the map.

Portland, Oregon Climate Table

 Climate Variable Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecAnnual
 
Average Max Temperature °C ( °F) 7 (45) 11 (51) 13 (56) 16 (61) 20 (67) 23 (74) 27 (80) 27 (80) 24 (75) 18 (64) 11 (53) 8 (46) 17 (63)
 
Average Temperature °C ( °F) 4 (40) 6 (44) 9 (47) 11 (51) 14 (57) 18 (64) 20 (68) 20 (69) 17 (63) 13 (55) 8 (46) 5 (40) 12 (54)
 
Average Min Temperature °C ( °F) 1 (34) 2 (36) 4 (39) 5 (41) 8 (47) 12 (53) 14 (56) 14 (57) 11 (52) 7 (45) 4 (40) 2 (35) 7 (45)
 
Average Precipitation mm (in) 136 (5) 98 (4) 90 (4) 61 (2) 52 (2) 38 (1) 16 (1) 28 (1) 44 (2) 68 (3) 136 (5) 156 (6) 922 (36)
Number of Wet Days (probability of rain on a day %) 18 (58) 15 (53) 17 (55) 12 (40) 10 (32) 9 (30) 3 (10) 4 (13) 6 (20) 12 (39) 15 (50) 19 (61) 140 (38)
Average Sunlight Hours/ Day 1h 48' 3h 15' 4h 00' 6h 16' 7h 05' 6h 44' 10h 27' 8h 21' 7h 08' 4h 11' 2h 56' 1h 48' 5h 20'
Average Daylight Hours/ Day 9h 07' 10h 18' 11h 50' 13h 29' 14h 53' 15h 37' 15h 17' 14h 04' 12h 29' 10h 50' 9h 27' 8h 45' 12h 00'
Percentage of Sunny (Cloudy) Daylight Hours 20 (80) 32 (68) 34 (66) 47 (53) 48 (52) 44 (56) 69 (31) 60 (40) 58 (42) 39 (61) 32 (68) 21 (79) 45 (55)
Sun altitude at solar noon on the 21st day (°). 24.6 34 44.8 56.5 64.7 67.8 64.7 56.3 44.9 33.4 24.3 21 44.7

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