Bethlehem weather by month
Average highs run from 38°F in January to 86°F in July, and January nights average 22°F. It gets 47 inches of rain and melted snow a year and 33 inches of snow. Nights drop below freezing about 118 times a year. The most comfortable months are May to June and October.
Best time to visit Bethlehem
For comfortable weather, go in May to June and October. In those months the average high stays between 62°F and 86°F, nights average 42°F or warmer, and rain stays under 4.5 inches for the month.
Month by month
| Month | High | Low | Precip. | Snow | Wet days | Days 90°F+ | Nights below 32°F | Feels |
|---|---|---|---|---|---|---|---|---|
| January | 38°F | 22°F | 3.3 in | 9.8 in | 6 | 0 | 27 | cold |
| February | 42°F | 23°F | 2.8 in | 10.8 in | 6 | 0 | 24 | cold |
| March | 51°F | 31°F | 3.6 in | 6.3 in | 7 | 0 | 19 | cool |
| April | 63°F | 40°F | 3.7 in | 0.5 in | 7 | 0 | 6 | mild days, chilly nights |
| May | 74°F | 51°F | 3.7 in | 0.0 in | 8 | 1 | 0 | mild |
| June | 82°F | 60°F | 4.4 in | 0.0 in | 7 | 3 | 0 | warm |
| July | 86°F | 65°F | 5.3 in | 0.0 in | 8 | 8 | 0 | warm |
| August | 84°F | 63°F | 4.6 in | 0.0 in | 7 | 5 | 0 | warm |
| September | 77°F | 55°F | 4.8 in | 0.0 in | 7 | 2 | 0 | warm |
| October | 66°F | 44°F | 4.1 in | 0.2 in | 6 | 0 | 3 | mild |
| November | 54°F | 34°F | 3.2 in | 0.9 in | 6 | 0 | 15 | cool |
| December | 43°F | 27°F | 3.9 in | 4.6 in | 7 | 0 | 24 | cold |
| Year | 63°F avg | 43°F avg | 47.4 in | 33.1 in | 82 | 18 | 118 |
"Wet days" are days with at least 0.1 inch of precipitation. "Feels" is a plain-language label for the average high. Normals for 1991-2020 from NOAA NCEI, station Allentown Intl. Airport, PA (USW00014737), 3.7 miles from the city center. Averages describe typical conditions, not a forecast.
Sunrise, sunset and daylight in Bethlehem
The shortest day is December 21, with 9h 15m of daylight; the longest is June 21, with 15h 05m. The earliest sunset comes around December 5 (4:33 pm) and the latest around June 23 (8:36 pm). The sun sets after 8 pm on 103 days a year.
| On the 15th of | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:23 am | 4:58 pm | 9h 35m |
| February | 6:55 am | 5:36 pm | 10h 41m |
| March | 7:13 am | 7:08 pm | 11h 55m |
| April | 6:22 am | 7:40 pm | 13h 18m |
| May | 5:44 am | 8:11 pm | 14h 27m |
| June | 5:30 am | 8:34 pm | 15h 04m |
| July | 5:43 am | 8:30 pm | 14h 47m |
| August | 6:12 am | 7:59 pm | 13h 47m |
| September | 6:42 am | 7:10 pm | 12h 28m |
| October | 7:12 am | 6:20 pm | 11h 08m |
| November | 6:48 am | 4:43 pm | 9h 55m |
| December | 7:18 am | 4:34 pm | 9h 16m |
Calculated for 2026 at the center of Bethlehem with NOAA's solar equations, in local clock time (Eastern Time, including daylight saving time where it applies). Times shift by a minute or two from year to year.
Is Bethlehem getting warmer?
The last 10 years averaged 3.4°F warmer than the 20th century. See the climate stripes for Bethlehem.Frequently asked questions
What is the warmest month in Bethlehem?
July is the warmest month, with an average high of 86°F and an average low of 65°F (NOAA 1991-2020 normals).
What is the coldest month in Bethlehem?
January is the coldest, with average lows of 22°F and highs of 38°F.
What is the rainiest month in Bethlehem?
July gets the most precipitation, 5.3 inches on average. February is the driest at 2.8 inches.
Does it snow in Bethlehem?
Yes. Bethlehem averages 33 inches of snow a year.
When is the best time to visit Bethlehem?
For comfortable weather, May to June and October. Those months average highs between 62 and 86°F with lows of 42°F or more and modest rain.
Thinking of moving to Bethlehem?
See what homes, rent and everyday prices cost, who lives there and how it compares with nearby cities on the full Bethlehem profile.
Compare the weather: Bethlehem vs Allentown, Bethlehem vs Reading, Bethlehem vs Trenton, Bethlehem vs Philadelphia.