Philadelphia · January
Run in the midday.
Cold: average high 41°F, low 26°F. Layering becomes the workout. Cold mornings warm into runnable midday hours — the windows around noon catch the warmest temperatures.
Avg high / low
41° / 26°F
Humidity
65%
Rain days
12/mo
Wind
12 mph
What January feels like in Philadelphia
Sunrise
08:18
Mid-month average
Sunset
18:01
Mid-month average
Time-of-day breakdown
Morning
Steady cool air, low wind, and good light. The standard runner window in most months.
Midday
Often the warmest few hours of a cold day. If you can only run once, midday gives you the most temperate window.
Evening
Cold drops back in fast after sunset. Tight window — done before headlamp territory.
What to wear running in Philadelphia in January
The kit for January in Philadelphia: cold-weather layers, gloves, and ear coverage on most mornings.
January vs the surrounding months
vs December
-6° avg high
-1 rain days
Philadelphia in December →
January
41°F avg high
12 rain days
Best: midday
vs February
-4° avg high
-1 rain days
Philadelphia in February →
Frequently Asked Questions
What is the best time of day to run in Philadelphia in January?+
Midday. Cold mornings warm into runnable midday hours — the windows around noon catch the warmest temperatures.
What's the average temperature in Philadelphia in January?+
Average high 41°F, average low 26°F.
How does January compare to surrounding months in Philadelphia?+
Compared to December (avg high 47°F), January is cooler. Compared to February (avg high 45°F), January is cooler.
Does it rain often in Philadelphia in January?+
Expect about 12 measurable rain days in January, on average.