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United StatesThe weather in January in Philadelphia
It's cold in January in Philadelphia with an average temperature of 6°C. Temperatures this month range from a low of 0°C to a high of 14°C. At night, you can expect temperatures between -6°C and 4°C.
Looking for sun? January isn’t a good month to be in Philadelphia. There’s too much chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in January for Philadelphia, Pennsylvania. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 20°C in 2020, Philadelphia reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was -11°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of -16°C to a highest value of 13°C.
Precipitation and snowfall
In January, there is an average of 106 mm of precipitation, spread over 15 days. Of the total precipitation, about 14 cm falls as snow in January. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in January for Philadelphia
Click on any day in January to get detailed info about the usual weather on that day in Philadelphia. Check out the historical temperatures and precipitation over the past 10 years on this day.
January weather comparison
| Philadelphia | New York | |
|---|---|---|
| Average temperature | 6°C | 5°C |
| Max. temperature | 14°C | 11°C |
| Min. temperature | -6°C | -5°C |
| Total precipitation | 106 mm | 97 mm |
| Rainy days | 15 days | 12 days |
| Total snowfall | 14 cm | 16 cm |
| Snowy days | 6 days | 8 days |
Start of January
The month of January starts in Philadelphia with cold temps, averaging around 5°C during the day and nights around -2°C.
Mid January
By mid-January, daytime temps rise to around 8°C, with nights around 0°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of January
By the end of January, the average daytime temperature in Philadelphia is around 6°C, while nighttime temps are about 0°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Check out the climate of Philadelphia for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in January in Philadelphia, Pennsylvania. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in January in Philadelphia
Temperature in January in Philadelphia over the years
Precipitation charts
These charts show the average amount of precipitation in January in Philadelphia, Pennsylvania. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in January in Philadelphia
Total precipitation in January in Philadelphia over the years
Daily Snowfall in January in Philadelphia
Snowfall in January in Philadelphia per year
Daily UV index in January in Philadelphia
This chart shows the average daily UV index in January in Philadelphia, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in January in Philadelphia
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Average weather in Philadelphia by month
Click on a month below to see detailed weather info for Philadelphia. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.