North Bethlehem, PA climate
North Bethlehem has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 21°, and about 32 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in North Bethlehem feels like
Winter
Spring
Summer
Fall
North Bethlehem weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 38° | 21° | 3.2" | 9.9" | 16 | 14 | 21° – 39° |
| February | 41° | 23° | 2.8" | 7.5" | 13 | 12 | 20° – 41° |
| March | 50° | 30° | 3.5" | 6.1" | 13 | 6 | 34° – 51° |
| April | 63° | 39° | 3.5" | 0.6" | 14 | 0 | 45° – 56° |
| May | 72° | 48° | 4.3" | 0 | 14 | 0 | 54° – 67° |
| June | 80° | 57° | 4.4" | 0 | 13 | 0 | 64° – 71° |
| July | 83° | 61° | 4.1" | 0 | 12 | 0 | 68° – 76° |
| August | 82° | 60° | 3.8" | 0 | 10 | 0 | 67° – 76° |
| September | 76° | 53° | 3.4" | 0 | 10 | 0 | 62° – 69° |
| October | 64° | 42° | 3.0" | 0 | 11 | 0 | 50° – 59° |
| November | 52° | 33° | 2.9" | 1.8" | 12 | 2 | 36° – 48° |
| December | 42° | 26° | 3.2" | 6.0" | 15 | 8 | 24° – 45° |
| Year | 62° | 41° | 42.1" | 31.9" | 154 | 41 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in North Bethlehem
North Bethlehem gets 42 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 154 days a year. Snow covers the ground about 41 days of the year.
About 181 frost-free days a year
In half of years the last 32° night comes by April 24 and the first one by October 23. That leaves about 181 frost-free days for gardens, longer than 54% of U.S. towns.
Heating and cooling a home in North Bethlehem
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In North Bethlehem, 88% of that work is heating and 12% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
North Bethlehem and its neighbors
North Bethlehem borders 8 towns with climate data. January nights across them vary by 0.7°. Amwell has the coldest January nights (21°) and West Bethlehem the hottest July afternoons (84°). North Bethlehem’s January low is 21° and its July high 83°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How North Bethlehem compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in North Bethlehem averaged 1.0° warmer than the 1900s. The biggest change is in December (+2.4°). The shift is smaller than in 69% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at North Bethlehem’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 24° to 45°. June is the most reliable, staying within 7°.
Common questions about North Bethlehem’s climate
What is the coldest month in North Bethlehem?
January, with a typical high of 38° and a low of 21°.
What is the hottest month in North Bethlehem?
July, with a typical high of 83° and a low of 61°. About 6 days a year reach 90°.
How much snow does North Bethlehem get?
About 32 inches in a normal winter, most of it in January.
When is the first frost in North Bethlehem?
In half of years the first 32° night comes by October 23, and the last spring frost by April 24.
What is the rainiest month in North Bethlehem?
June, with 4.4 inches of rain and melted snow. The year totals 42 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for North Bethlehem itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Washington 3 Ne, PA (7 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.