Northumberland, Pennsylvania Climate
United States
Pop. 3,728 Elev. 152 m / 499 ft
TZ: America/New_York (UTC-4) ·
Summers in Northumberland are warm, with July highs around 85°F (29°C), while winters are frigid with January lows of 21°F (-6°C). Humidity pushes the summer feels-like temperature to 95°F (35°C), while wind chill can drive winter lows to 14°F (-10°C). Expect around 54 rainy days annually (36.6 in / 930 mm total), with snow on 3 days and 28 in (715 mm) of annual accumulation. The city averages 106 sunny days per year and around 25 thunderstorm days.
| Temperature | 85°F (30°C) high | 21°F (-6°C) low |
| Feels like | 95°F (35°C) high | 14°F (-10°C) low |
| Rain | 54 days | 36.6 in (930 mm) /yr |
| Snow | 3 days | 28.1 in (715 mm) /yr |
| Sky | 106 sunny | 25 stormy |
| Wind | 2.2 mph (1.0 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, Aug, Sep
Sky & Air by Month
Cloud cover (%)
57
Jan 74
Feb 51
Mar 72
Apr 74
May 63
Jun 57
Jul 44
Aug 52
Sep 40
Oct 62
Nov 69
Dec Humidity (%)
56
Jan 57
Feb 52
Mar 55
Apr 71
May 72
Jun 74
Jul 67
Aug 66
Sep 67
Oct 64
Nov 65
Dec Weather Days by Month
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 25 mi Williamsport Regional Airport (IPT)
Ski resort 36 mi Eagle Rock Ski Resort
National park 99 mi Appalachian National Scenic Trail
Mountain peak
(5,102 ft) 266 mi Algonquin Peak
Hospital 2 mi UPMC Susquehanna Sunbury
Hiking trail 20 mi Winter Park Hiking
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 33°F 0°C | 21°F -6°C | 0.5 in 13 mm | 5.1 in129 mm | 9 |
| February | 38°F 3°C | 26°F -3°C | 2.1 in 53 mm | 9.0 in229 mm | 1 |
| March | 57°F 14°C | 35°F 2°C | 2.8 in 71 mm | 0.2 in5 mm | 11 |
| April | 63°F 17°C | 44°F 7°C | 3.6 in 92 mm | 0.1 in3 mm | 5 |
| May | 69°F 21°C | 53°F 12°C | 6.9 in 174 mm | — | 4 |
| June | 81°F 27°C | 63°F 17°C | 5.0 in 127 mm | — | 9 |
| July | 85°F 30°C | 68°F 20°C | 4.1 in 103 mm | — | 8 |
| August | 80°F 27°C | 60°F 15°C | 2.4 in 60 mm | — | 16 |
| September | 78°F 26°C | 56°F 13°C | 1.5 in 38 mm | — | 15 |
| October | 64°F 18°C | 45°F 7°C | 4.5 in 114 mm | — | 18 |
| November | 51°F 10°C | 36°F 2°C | 1.6 in 41 mm | 2.7 in69 mm | 3 |
| December | 36°F 2°C | 23°F -5°C | 1.8 in 44 mm | 11.0 in280 mm | 7 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 9 | 0 |
| February | 1 | 0 |
| March | 11 | 2 |
| April | 5 | 2 |
| May | 4 | 5 |
| June | 9 | 5 |
| July | 8 | 6 |
| August | 16 | 2 |
| September | 15 | 1 |
| October | 18 | 1 |
| November | 3 | 0 |
| December | 7 | 1 |