Temperatures Precipitation Sun/ Daylight Humidity Graphs Map Comparisons Forecast Hotels January February March April May June July August September October November December Weather in January in Portland, Oregon

• The average temperature in Portland, Oregon in January is cool at 4.2 °C (39.56 °F).
• Afternoons can be a little cool with average high temperatures reaching 7.4 °C (45.3 °F).
• Overnight temperatures are generally very cool with an average low of 0.9 °C (33.6 °F).
• The average diurnal temperature variation/ range in January is 6.5 °C (11.7 °F).
• The weather in January is far from dry with sleet, rain or snow at intervals. Some 135.9mm (5.4in) of fluid precipitates during on average 18 days.
• The skies in Portland, Oregon are really dreary with on average only 1:48 of intense solar radiation daily.
• The shortest day is 8:45 long and the longest day is 9:37 long with an average length of 9:07.
• There are approximately 7:07 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
• It is sunny approximately 20.2% of daylight hours and cloudy 79.8% of daylight hours.

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Weather Trend Graph for January in Portland, Oregon, Usa

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