Bethlehem, PA Weather & Climate Normals
What a normal year in Bethlehem actually looks like
On the 30-year record NOAA keeps for Bethlehem, PA, the comfort score comes out to 41/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 4 months a year land in the 55–75°F range this site treats as mild.
How much Bethlehem's weather actually swings
Average temperatures in Bethlehem run from 30°F in Jan up to 76°F in Jul, a 45.5°F seasonal swing, one of the widest gaps in this dataset.
Bethlehem, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 38°F | 22°F | 3.3in | 9.8in |
| Feb | 42°F | 23°F | 2.77in | 10.8in |
| Mar | 51°F | 31°F | 3.63in | 6.3in |
| Apr | 63°F | 40°F | 3.67in | 0.5in |
| May | 74°F | 51°F | 3.65in | 0in |
| Jun | 82°F | 60°F | 4.4in | 0in |
| Jul | 86°F | 65°F | 5.3in | 0in |
| Aug | 84°F | 63°F | 4.56in | 0in |
| Sep | 77°F | 55°F | 4.84in | 0in |
| Oct | 66°F | 44°F | 4.14in | 0.2in |
| Nov | 54°F | 34°F | 3.24in | 0.9in |
| Dec | 43°F | 27°F | 3.86in | 4.6in |
If you're timing a visit, May, Jun, Aug, and Sep are Bethlehem's mildest stretch; if you're moving there, you should plan around Jul's heat and Jan's cold instead.
How wet Bethlehem actually gets
Over a typical year, Bethlehem sees about 47.36in of precipitation a year across roughly 129 days with measurable rain or snow, with 33.1in of snow a year.
Bethlehem against the rest of the country
Out of 4876 cities scored here, Bethlehem comes in at 4346; within PA alone it ranks 182 of 193. Population is about 79,453.
Checking the actual forecast
These figures come from Allentown Intl Ap, PA US, the NOAA station 4.6 miles from Bethlehem, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is