Climate and monthly weather forecastBethlehem, MD
Climate and monthly weather forecast
Weather in January
January, like December, in Bethlehem, Maryland, is another cold winter month, with temperature in the range of an average low of 29.7°F (-1.3°C) and an average high of 40.6°F (4.8°C). January is the coldest month of the year, registering average temperatures as high as 40.6°F (4.8°C) and as low as 29.7°F (-1.3°C). Weather in January »Weather in February
February, the last month of the winter in Bethlehem, is a chilly month, with an average temperature ranging between min 32°F (0°C) and max 44.2°F (6.8°C). The shift into February reveals an average high-temperature of a chilly 44.2°F (6.8°C), closely mirroring January's climate. Weather in February »Weather in March
March, the first month of the spring in Bethlehem, is a cool month, with an average temperature fluctuating between 38.1°F (3.4°C) and 50.9°F (10.5°C). The transition from February to March brings a subtle temperature rise, with average high-temperatures increasing from a frosty 44.2°F (6.8°C) to a cool 50.9°F (10.5°C). Weather in March »Weather in April
April is a comfortable spring month in Bethlehem, Maryland, with an average temperature varying between 62.2°F (16.8°C) and 47.8°F (8.8°C). April comes with an increase, with the average high-temperature moving from a fresh 50.9°F (10.5°C) in March to a comfortable 62.2°F (16.8°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Bethlehem, Maryland, with an average temperature ranging between min 57.4°F (14.1°C) and max 71.8°F (22.1°C). Noticing a change, the average high-temperature during May moves from April's comfortable 62.2°F (16.8°C) to an agreeable 71.8°F (22.1°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Bethlehem, Maryland, with temperature in the range of an average low of 66°F (18.9°C) and an average high of 79.7°F (26.5°C). June's arrival signals a modest temperature shift, moving from an agreeable 71.8°F (22.1°C) in May to a moderately hot 79.7°F (26.5°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Bethlehem, Maryland, with an average temperature fluctuating between 84.4°F (29.1°C) and 70.9°F (21.6°C). July, with its average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 70.9°F (21.6°C), holds the record as the warmest month. The heat index value for July is computed to be a hot 93.2°F (34°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Bethlehem, Maryland, with an average temperature varying between 68.9°F (20.5°C) and 82.9°F (28.3°C). The shift from July to August is characterized by an average high-temperature of a still moderately hot 82.9°F (28.3°C), not significantly different from the 84.4°F (29.1°C) of July. Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Bethlehem, Maryland, with an average temperature fluctuating between 77.4°F (25.2°C) and 63.5°F (17.5°C). September's arrival signals a moderate reduction in the average high-temperature, easing from a warm 82.9°F (28.3°C) in August to a still moderately hot 77.4°F (25.2°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Bethlehem, Maryland, with an average temperature varying between 66.7°F (19.3°C) and 54.1°F (12.3°C). In Bethlehem, entering October brings a temperature decrement, reducing from September's moderately hot 77.4°F (25.2°C) to an enjoyable 66.7°F (19.3°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Bethlehem, Maryland, with an average temperature ranging between min 42.6°F (5.9°C) and max 54.5°F (12.5°C). Bethlehem's weather changes with the onset of November, slightly falling from a refreshing 66.7°F (19.3°C) in October to a cool 54.5°F (12.5°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Bethlehem, Maryland, with an average temperature fluctuating between 46.8°F (8.2°C) and 36.1°F (2.3°C). The onset of December is marked by a minor decrease in temperature, transitioning from a cool 54.5°F (12.5°C) in November to a frosty 46.8°F (8.2°C). Weather in December »Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Bethlehem's January weather, with an average high temperature of 40.6°F (4.8°C) and an average low temperature of 29.7°F (-1.3°C), tends to be the coldest of the year.
January and November, with an average relative humidity of 73%, are the least humid months.
The month with the least rainfall is January, when the rain falls for 7.5 days and typically collects 0.75" (19mm) of precipitation.
Throughout the year, there are 130 rainfall days, and 15.04" (382mm) of precipitation is accumulated.
January through April, November and December are months with snowfall.
The month with the most snowfall in Bethlehem is January, when snow falls for 3 days and typically aggregates up to 0.59" (15mm) of snow.
Throughout the year, there are 9.4 snowfall days, and 1.85" (47mm) of snow is accumulated.
The months with the lowest UV index in Bethlehem are January, February and December, with an average maximum UV index of 2.
February has the least sunshine of the year, with an average of 5.2h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
May is the most humid month, with an average relative humidity of 79%.
May through October are months without snowfall.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
The month with the longest days is June, with an average of 14h and 48min of daylight.
With average temperatures fluctuating between a high of 84.4°F (29.1°C) and a low of 70.9°F (21.6°C), July stands out as the warmest month.
July has the most sunshine of the year, with an average of 10.9h of sunshine.
August is the month with the most rainfall. Rain falls for 14.2 days and accumulates 1.93" (49mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Bethlehem, MD
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (40.6°F).
The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure
Bethlehem, MD
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Bethlehem, MD
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.9mph - Average wind speed in April:
9.7mph - Average wind speed in May:
8mph - Average wind speed in June:
7.4mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.5mph - Average wind speed in November:
8.8mph - Average wind speed in December:
8.9mph
The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Bethlehem, MD
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).
Average rainfall
Bethlehem, MD
- Average rainfall in January:
0.75" - Average rainfall in February:
1.02" - Average rainfall in March:
1.14" - Average rainfall in April:
1.14" - Average rainfall in May:
1.18" - Average rainfall in June:
1.77"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.93" - Average rainfall in September:
0.79" - Average rainfall in October:
1.5" - Average rainfall in November:
0.91" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days
Bethlehem, MD
- Average rainfall days in January:
7.5 days - Average rainfall days in February:
7.4 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
11.7 days - Average rainfall days in May:
13 days - Average rainfall days in June:
12.7 days
- Average rainfall days in July:
14.9 days - Average rainfall days in August:
14.2 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
9.4 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
8.6 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is February (7.4 days).
Average snowfall
Bethlehem, MD
The month with the highest snowfall is January (0.59").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Bethlehem, MD
- Average snowfall days in January:
3 days - Average snowfall days in February:
2.3 days - Average snowfall days in March:
2.1 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.4 days - Average snowfall days in December:
1.5 days
The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Bethlehem, MD
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 24min - Average sunshine in February:
5h and 12min - Average sunshine in March:
6h and 54min - Average sunshine in April:
9h and 0min - Average sunshine in May:
9h and 12min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
10h and 30min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days
Bethlehem, MD
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
16.8 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
16.8 days - Average sunshine days in May:
14.9 days - Average sunshine days in June:
14.5 days
- Average sunshine days in July:
13.4 days - Average sunshine days in August:
13 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
21 days - Average sunshine days in December:
20.1 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is August (13 days).
Average UV index
Bethlehem, MD
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Bethlehem, MD
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility
Bethlehem, MD
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
