It's winter in Philly. You know the drill. One day you’re walking down Chestnut Street thinking maybe spring is early, and the next, the Schuylkill is looking like a giant slushie. If you're asking what's the weather for philadelphia tomorrow, Sunday, January 18, 2026, the answer is pretty straightforward: it’s going to snow.
Honestly, it isn't going to be a blizzard that shuts down the city for a week. We aren't looking at 1996 levels of chaos here. But you definitely won't be wearing sneakers if you have any plans to be outside.
The Specifics for Sunday
The high for Sunday is hitting 36°F. That’s that weird, annoying temperature where things melt just enough to turn into a mess but stay cold enough to soak through your socks. The low is dipping down to 22°F at night.
What to expect during the day
The daytime condition is officially "snow." We are looking at a 65% chance of precipitation during the daylight hours. That’s more than a coin flip. If you have a brunch reservation in Fishtown or you were planning on hitting the Italian Market, expect white stuff coming from the sky.
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The humidity is going to be high—around 83%. It’s going to feel damp. That "wet cold" that gets into your bones. The wind is coming from the north at 7 mph. It’s a light breeze, but coming from the north, it’ll carry that sharp winter edge.
- High Temperature: 36°F
- Daytime Condition: Snow
- Precipitation Chance: 65%
- Wind Speed: 7 mph from the North
Planning Your Evening in Philly
As the sun goes down, things change a bit. The night-time condition shifts to "partly cloudy." The chance of snow drops significantly to 25%.
This is where it gets tricky. Since the temperature is dropping to 22°F, anything that melted during the day when it was 36°F is going to freeze solid. Black ice on the side streets in South Philly is almost a guarantee. If you’re driving back from a friend's place or heading out for a late dinner, watch the sidewalks.
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The UV index is sitting at a 1. Basically, you won't see the sun. It’s a classic gray, snowy Philadelphia winter day.
How to Handle Tomorrow’s Forecast
Philly people are tough, but we also hate being wet and cold for no reason.
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Basically, layer up. If you're walking the dog or heading to the store, wear something waterproof. The snow at 36°F is usually the heavy, wet kind—the stuff that's great for snowballs but terrible for staying dry.
Check your SEPTA alerts before you leave. While 36°F and light snow shouldn't derail the Broad Street Line, the buses sometimes get a little wonky when the hills in Manayunk or Northwest Philly start getting slick.
Next Steps for Philadelphians:
- Salt your sidewalk before the sun goes down Sunday evening to prevent that 22°F freeze from turning your front step into a skating rink.
- Wear waterproof shoes if you're out during the day; the 65% snow chance means the slush will be real.
- Check for travel delays if you are flying out of PHL, as even light snow can cause ripple effects in de-icing schedules.
Stay warm out there. It's just another January day in the city.