Philadelphia weather in January
Philadelphia in January averages 1°C (34°F), 79 mm of rain and 4.2 hours of sun a day.
Of the twelve months in Philadelphia, January is the coldest, the third driest and the dullest.
- Average temp
- 1°C (34°F)
-3–5°C · 27–41°F
- Rainfall
- 79 mm
Showers likely
- Sunshine
- 4.2 h
hours per day
- Wind
- 16 km/h
What is Philadelphia like in January?
Daytime
Days are cool.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Philadelphia in January?
A light rain jacket
About 79 mm falls this month — showers rather than washouts.
A warm mid-layer
Nights drop to around -3°C (27°F).
January compared with December and February
January in Philadelphia is 2.7°C cooler than December and 22 mm drier than it, which averages 4°C (39°F).
January in Philadelphia is 1.2°C cooler than February and 10 mm wetter than it, which averages 2°C (36°F).
Daylight in Philadelphia in January
On 15 January the sun is up for 9 hours 39 minutes in Philadelphia, rising about 07:20 and setting about 16:59 local time.
January ends 44 minutes longer than it begins, so the last week of the month is a different length of day from the first.
That is 5 hours 21 minutes short of June, the longest-lit month here.
Where to stay in Philadelphia
Dates are a starting point for January.
Travel guides for Philadelphia
What to read before you book.
Philadelphia weather by month
TemperatureRainfall
How January compares with the rest of the year
January is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 1°C / 34°F | 79 mm |
| February | 2°C / 36°F | 69 mm |
| March | 7°C / 44°F | 101 mm |
| April | 13°C / 55°F | 88 mm |
| May | 18°C / 65°F | 86 mm |
| June | 23°C / 74°F | 103 mm |
| July | 26°C / 79°F | 111 mm |
| August | 25°C / 77°F | 109 mm |
| September | 21°C / 70°F | 112 mm |
| October | 15°C / 58°F | 88 mm |
| November | 9°C / 48°F | 74 mm |
| December | 4°C / 39°F | 101 mm |
Similar weather in January
Other destinations whose January averages sit close to this one.
Check another month
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FAQs about Philadelphia in January
January climate averages for Philadelphia, 1991–2020.
Philadelphia averages 1°C (34°F) in January, ranging from about -3°C (27°F) at night to 5°C (41°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 79 mm falls across January, enough to need a light jacket but not enough to reshape a trip.
No. January averages 1°C (34°F) against 2°C (36°F) in February — 1.2°C cooler.
January is 2.7°C cooler than December, and 22 mm drier.
It is outside the easiest window. The most comfortable stretch here is May to October; January sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
About 4.2 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what January is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 9 hours 39 minutes of daylight in mid-January, against 15 hours in June and 9 hours 21 minutes in December.
On 15 January, sunrise is about 07:20 and sunset about 16:59 local time. Both shift across the month — the month ends 44 minutes longer than it starts.
