Portland · January
Run in the midday.
Cold: average high 47°F, low 36°F. Layering becomes the workout. Humidity averages 85% — the limiting factor on most runs. Expect 20 rain days — plan around the radar. Cold mornings warm into runnable midday hours — the windows around noon catch the warmest temperatures.
Avg high / low
47° / 36°F
Humidity
85%
Rain days
20/mo
Wind
11 mph
What January feels like in Portland
Sunrise
08:44
Mid-month average
Sunset
17:55
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Portland in January
The kit for January in Portland: a long-sleeve or light jacket for the first mile, a water-resistant cap or jacket on standby.
January vs the surrounding months
vs December
+2° avg high
-2 rain days
Portland in December →
January
47°F avg high
20 rain days
Best: midday
vs February
-1° avg high
0 rain days
Portland in February →
Frequently Asked Questions
What is the best time of day to run in Portland in January?+
Midday. Cold mornings warm into runnable midday hours — the windows around noon catch the warmest temperatures.
What's the average temperature in Portland in January?+
Average high 47°F, average low 36°F.
How does January compare to surrounding months in Portland?+
Compared to December (avg high 46°F), January is warmer. Compared to February (avg high 48°F), January is cooler.
Does it rain often in Portland in January?+
Expect about 20 measurable rain days in January, on average.