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United States weather

Weather in Allegheny County, Pennsylvania for January 2026

Your guide to Allegheny County weather in January - trends and predictions

    Official Weather Alert ⚠️

  • Cold Weather Advisory - See hour by hour.

    • Snow Forecast ❄️

  • Expect heavy snowfall in Allegheny County during January, with an average of 16 snowy days.
    According to Allegheny County snow forecast for January 2026, no snow is expected until the end of the month.

    • Temperatures

  • Until now, January 2026 in Allegheny County is cooler than usual, with temperatures averaging -0.6 °F, this is -2.5 °F below the typical seasonal average.

  • In general, the average temperature in Allegheny County at the beginning of January is 3.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of -0.3 °F by the end of January.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
6
Dry days
Average rainy days
9
Rainy days
Average snowy days
16
Snow days
Average temperatures
2°/-3°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Allegheny County Weather January

Move between months or click on a day
December
February
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
5°
2
Overcast
4°
3
Moderate or heavy rain shower
5°
4
Overcast
3°
5
Overcast
4°
6
Patchy rain possible
3°
7
Light snow showers
2°
8
Overcast
3°
9
Overcast
6°
10
Overcast
4°
11
Overcast
4°
12
Moderate or heavy rain shower
6°
13
Overcast
5°
14
Cloudy
0°
15
Overcast
-2°
16
Overcast
0°
17
Overcast
2°
18
Overcast
2°
19
Moderate or heavy rain shower
2°
20
Patchy rain possible
-3°
21
Light freezing rain
-2°
22
Overcast
-1°
23
Overcast
0°
24
Overcast
-2°
25
Moderate or heavy snow showers
2°
26
Overcast
2°
27
Overcast
0°
28
Overcast
1°
29
Overcast
0°
30
Overcast
2°
31
Weather Alert Overcast
-9°

Temperatures trend during January in Allegheny County

See the weather trend as well as the moving average line

January weather in Allegheny County day by day

Click on a date for more information
December February
Date Weather Temperatures Rain Snow More
Jan. 1 Patchy rain possible
Patchy rain possible
 5° /-2° 3.2 mm 1.5 cm
Jan. 2 Overcast
Overcast
 4° /-1° 0.6 mm 0 cm
Jan. 3 Moderate or heavy rain shower
Moderate or heavy rain shower
 5° /0° 9.1 mm 0.2 cm
Jan. 4 Overcast
Overcast
 3° /-1° 0.8 mm 0.1 cm
Jan. 5 Overcast
Overcast
 4° /-3° 0 mm 0 cm
Jan. 6 Patchy rain possible
Patchy rain possible
 3° /-1° 14.6 mm 10.1 cm
Jan. 7 Light snow showers
Light snow showers
 2° /-2° 0.9 mm 0.7 cm
Jan. 8 Overcast
Overcast
 3° /-2° 0.4 mm 0.2 cm
Jan. 9 Overcast
Overcast
 6° /-1° 5.5 mm 0 cm
Jan. 10 Overcast
Overcast
 4° /-2° 1.8 mm 0.4 cm
Jan. 11 Overcast
Overcast
 4° /-2° 2.9 mm 1.5 cm
Jan. 12 Moderate or heavy rain shower
Moderate or heavy rain shower
 6° /-1° 10.7 mm 0 cm
Jan. 13 Overcast
Overcast
 5° /-2° 0.7 mm 0 cm
Jan. 14 Cloudy
Cloudy
 0° /-6° 1.4 mm 0.1 cm
Jan. 15 Overcast
Overcast
 -2° /-8° 0 mm 0 cm
Jan. 16 Overcast
Overcast
 0° /-8° 0.7 mm 0.6 cm
Jan. 17 Overcast
Overcast
 2° /-5° 2 mm 0 cm
Jan. 18 Overcast
Overcast
 2° /-2° 2.4 mm 1.4 cm
Jan. 19 Moderate or heavy rain shower
Moderate or heavy rain shower
 2° /-6° 7.3 mm 1.3 cm
Jan. 20 Patchy rain possible
Patchy rain possible
 -3° /-10° 0.5 mm 0.1 cm
Jan. 21 Light freezing rain
Light freezing rain
 -2° /-9° 1.3 mm 0.9 cm
Jan. 22 Overcast
Overcast
 -1° /-9° 1.5 mm 0 cm
Jan. 23 Overcast
Overcast
 0° /-7° 1.3 mm 0 cm
Jan. 24 Overcast
Overcast
 -2° /-6° 2.9 mm 0 cm
Jan. 25 Moderate or heavy snow showers
Moderate or heavy snow showers
 2° /-5° 28 mm 15.7 cm
Jan. 26 Overcast
Overcast
 2° /-3° 1.7 mm 0.6 cm
Jan. 27 Overcast
Overcast
 0° /-6° 0.5 mm 0 cm
Jan. 28 Overcast
Overcast
 1° /-4° 6.4 mm 1 cm
Jan. 29 Overcast
Overcast
 0° /-4° 1 mm 0 cm
Jan. 30 Overcast
Overcast
 2° /-5° 0.9 mm 0.1 cm
Jan. 31 Overcast
Overcast
 -9° /-27° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Allegheny County in January is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Allegheny County forecast closer to your planned date for the most up-to-date weather information.
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Allegheny County in January - FAQ

What are the expected maximum and minimum temperatures in Allegheny County during January?

Brace for cold days with temperatures not exceeding 2° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.

How much rainfall should be expected in Allegheny County during January?

Significant rainfall exceeding 113.4 mm is expected in Allegheny County during January, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Allegheny County in January 2026?

Allegheny County experiences an average snowfall of 25.0233 cm during January, occurring over 16 days.

What are the typical wind conditions in Allegheny County during January?

The average wind speed in Allegheny County during January is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

Allegheny County snow forecast January 2026

Track daily snowfall levels and discover Allegheny County’s snowy potential this January ❄️
On average, Allegheny County sees 16 snowy days during January, with approximately 25 cm of total snowfall.

January rainfall patterns in Allegheny County

Explore the daily rainfall trends and prepare for Allegheny Countys January weather 💧
Typically, Allegheny County has 9 rainy days in January with a total of 113.4 mm of rainfall.
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Pittsburgh
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Location coordinates Where is Allegheny County?

Get accurate weather forecasts for Allegheny County, located at latitude 40.441 and longitude -79.996. Stay updated with localized weather information tailored for Allegheny County.

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