Philadelphia in January
In January, Philadelphia averages 5°C (41°F) during the day and -3°C (26°F) at night, with frequent rain — about 14 days of the month see precipitation (83 mm total).
Off-peakConditions are cold — pack winter layers. Plan for unsettled weather and bring rain gear.
January is one of the wetter and less comfortable months in Philadelphia. If your dates are flexible, consider a different time of year.
How January compares to the rest of the year in Philadelphia
January is one of the coolest months in Philadelphia (12th of 12) and moderately rainy compared to the rest of the year (8th of 12). Daytime temperature runs 13°C below the annual average (18°C). January runs 3°C cooler than December (8°C) and warms a further 2°C into February (7°C).
January sunrise & sunset in Philadelphia
Times shown for Philadelphia local time (America/New_York), calculated for the 15th of January. They shift by a few minutes day to day across the month.
Photography light in Philadelphia — January
Golden-hour and blue-hour windows for the 15th of January, in Philadelphia's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Philadelphia in January
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on January's tier (Off-peak) and Philadelphia's popularity.
January in United States — events that affect travel
Known cultural, religious, or national events that surge prices, fill hotels, or close businesses during this month. Plan around them, or build your itinerary around the ones you'd like to see.
Major travel surge plus widespread Dec 24-26 and Jan 1 business closures.
Plan: Book flights and hotels well ahead; expect many restaurants/shops closed Dec 25 and Jan 1.
Crowds & pricing — January in Philadelphia
This is off-peak for Philadelphia — the lowest prices of the year and the fewest crowds, but with real trade-offs: some restaurants, hotels, and beach businesses may close for the season; weather conditions can make outdoor activities unpredictable; and a handful of seasonal sights run reduced hours or close entirely. Great if you prefer a quiet local rhythm and don't mind the climate giving you reasons to choose indoor activities.
Why this tier: challenging tourism weather
Sun & mosquito risk — January in Philadelphia
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
🥶 Bitter cold — Philadelphia in January
Gear: Snow rare but air is freezing. Insulated coat, hat, and gloves still required — wind chill is the real enemy.
Philadelphia in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 5°C / 41°F | -3°C / 26°F | 83 mm | 14 | — |
| February | 7°C / 45°F | -2°C / 28°F | 96 mm | 14 | — |
| March | 11°C / 52°F | 1°C / 34°F | 101 mm | 15 | — |
| April | 17°C / 63°F | 7°C / 44°F | 106 mm | 17 | — |
| May | 23°C / 73°F | 13°C / 55°F | 108 mm | 17 | — |
| June | 28°C / 82°F | 18°C / 64°F | 107 mm | 17 | — |
| July | 30°C / 87°F | 21°C / 70°F | 123 mm | 19 | — |
| August | 29°C / 85°F | 20°C / 68°F | 106 mm | 18 | — |
| September | 26°C / 79°F | 17°C / 62°F | 101 mm | 14 | — |
| October | 20°C / 67°F | 11°C / 51°F | 106 mm | 15 | — |
| November | 13°C / 55°F | 4°C / 38°F | 79 mm | 11 | — |
| December | 8°C / 47°F | 0°C / 33°F | 111 mm | 12 | — |
Other cities with similar January weather
🌍 See the full ranked list of climate twins for Philadelphia in January →
Frequently asked questions
How hot is Philadelphia in January?
In January, Philadelphia averages a high of 5°C (41°F) and a low of -3°C (26°F) — generally cold.
Does it rain a lot in Philadelphia in January?
January can be fairly wet in Philadelphia, with about 14 rainy days on average.
Is January a good time to visit Philadelphia?
January is cold but on the rainy side. It suits travelers who are comfortable with cold weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Philadelphia in January?
Pack heavy winter layers, a coat, hat and gloves, plus a compact umbrella or rain jacket. See the full January packing list for Philadelphia for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.