Climate and monthly weather forecast
Bethlehem, CT

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Weather in January

January, like December, is a freezing cold winter month in Bethlehem, Connecticut, with temperature in the range of an average low of 19.8°F (-6.8°C) and an average high of 31.5°F (-0.3°C). January tends to be the coldest month, with temperatures averaging a daily high of 31.5°F (-0.3°C) and a low of 19.8°F (-6.8°C). Weather in January »

Weather in February

The last month of the winter, February, is a wintry month in Bethlehem, Connecticut, with temperature in the range of an average low of 20.7°F (-6.3°C) and an average high of 34.7°F (1.5°C). The arrival of February marks a slight shift to an average high-temperature of an icy 34.7°F (1.5°C) from January's 31.5°F (-0.3°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Bethlehem, Connecticut, with an average temperature varying between 28.2°F (-2.1°C) and 42.8°F (6°C). March's onset witnesses a minor shift in the average high-temperature, moving from a cold 34.7°F (1.5°C) in February to a chilly 42.8°F (6°C). Weather in March »

Weather in April

April is a refreshing spring month in Bethlehem, Connecticut, with an average temperature varying between 38.5°F (3.6°C) and 55.8°F (13.2°C). April's arrival coincides with a rise in the average high-temperature, moving from March's frosty 42.8°F (6°C) to a moderate 55.8°F (13.2°C). Weather in April »

Weather in May

May, the last month of the spring in Bethlehem, is a refreshing month, with an average temperature ranging between min 48.4°F (9.1°C) and max 67.6°F (19.8°C). In Bethlehem, the average high-temperature in May rises, from a moderate 55.8°F (13.2°C) in April, to an enjoyable 67.6°F (19.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Bethlehem, Connecticut, with an average temperature ranging between max 75.2°F (24°C) and min 55.8°F (13.2°C). As Bethlehem welcomes June, the average high-temperature displays a subtle shift, adjusting from a refreshing 67.6°F (19.8°C) in May to a moderately hot 75.2°F (24°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Bethlehem, Connecticut, with temperature in the range of an average low of 61.9°F (16.6°C) and an average high of 81.7°F (27.6°C). Bethlehem's temperatures peak on average in July, reaching 81.7°F (27.6°C) at their highest and 61.9°F (16.6°C) at their lowest. The heat index value for July is calculated to be a tropical 87.8°F (31°C). Weather in July »

Weather in August

August, the last month of the summer in Bethlehem, is also a moderately hot month, with an average temperature varying between 60.6°F (15.9°C) and 79.7°F (26.5°C). The shift into August finds Bethlehem at an average high-temperature of a still warm 79.7°F (26.5°C), closely comparable to July's conditions. Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Bethlehem, Connecticut, with an average temperature ranging between max 72.3°F (22.4°C) and min 54.1°F (12.3°C). Bethlehem's September weather shows a modest shift in high-temperatures, falling from August's moderately hot 79.7°F (26.5°C) to an agreeable 72.3°F (22.4°C). Weather in September »

Weather in October

October, like September, is another mild autumn month in Bethlehem, Connecticut, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 45.3°F (7.4°C). October involves a decrease in temperature, down from an agreeable 72.3°F (22.4°C) in September to a mild 59.9°F (15.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Bethlehem, Connecticut, with an average temperature varying between 47.5°F (8.6°C) and 34.2°F (1.2°C). November's onset corresponds with a shift in the average high-temperature, moving from a refreshing 59.9°F (15.5°C) in October to a frosty 47.5°F (8.6°C). Weather in November »

Weather in December

December, the first month of the winter in Bethlehem, is also an icy month, with an average temperature varying between 37.2°F (2.9°C) and 26.4°F (-3.1°C). As November shifts into December, a slight alteration in temperatures is observed, with average highs reducing from a frosty 47.5°F (8.6°C) to an icy 37.2°F (2.9°C). Weather in December »
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in Bethlehem?

In Bethlehem, January is known for its average lowest temperatures, reaching a high of 31.5°F (-0.3°C) and a low of 19.8°F (-6.8°C).

How many days does it rain in Bethlehem?

In Bethlehem, Connecticut, during the entire year, the rain falls for 161.7 days and collects up to 34.65" (880mm) of precipitation.

When does it snow in Bethlehem?

January through May, October through December are months with snowfall in Bethlehem.

How much does it snow in Bethlehem?

Throughout the year, there are 39.4 snowfall days, and 24.37" (619mm) of snow is accumulated.

When is the lowest UV index in Bethlehem?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the most humid month in Bethlehem?

The most humid month in Bethlehem, Connecticut, is February, with an average relative humidity of 81%.

What is the snowiest month in Bethlehem?

February is the month with the most snowfall. Snow falls for 9.3 days and accumulates 6.1" (155mm) of snow.

What is the month with the least sunshine in Bethlehem?

The month with the least sunshine in Bethlehem is February, with an average of 4.4h of sunshine.

When is Daylight Saving Time (DST) in Bethlehem?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Bethlehem, Connecticut, 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.

What is the least humid month in Bethlehem?

With an average relative humidity of 73%, April is the least humid month.

When it does not snow in Bethlehem?

June through September are months without snowfall in Bethlehem, Connecticut.

When are the longest days in Bethlehem?

The month with the longest days in Bethlehem, Connecticut, is June, with an average of 15h and 6min of daylight.

When is the highest UV index in Bethlehem?

June and July, with an average maximum UV index of 6, are months with the highest UV index in Bethlehem, Connecticut.

What time of the year is the hottest in Bethlehem?

July, known for its average high temperature of 81.7°F (27.6°C) and an average low temperature of 61.9°F (16.6°C), is the warmest month in Bethlehem, Connecticut.

What month has the most sunshine in Bethlehem?

With an average of 10.2h of sunshine, July has the most sunshine of the year.

What is the driest month in Bethlehem?

The month with the least rainfall in Bethlehem is September, when the rain falls for 13.5 days and typically collects 2.24" (57mm) of precipitation.

What is the rainiest month in Bethlehem?

The month with the most rainfall in Bethlehem is December, when the rain falls for 10.8 days and typically aggregates up to 3.62" (92mm) of precipitation.

What is the month with the shortest days in Bethlehem?

December has the shortest days of the year in Bethlehem, Connecticut, with an average of 9h and 12min of daylight.

Average temperature
Bethlehem, CT

Average temperature - Bethlehem, CT

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (31.5°F).

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure
Bethlehem, CT

Average pressure - Bethlehem, CT

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
Bethlehem, CT

Average wind speed - Bethlehem, CT

The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity
Bethlehem, CT

Average humidity - Bethlehem, CT

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (73%).

Average rainfall
Bethlehem, CT

Average rainfall - Bethlehem, CT

The wettest month (with the highest rainfall) is December (3.62").
The driest month (with the least rainfall) is September (2.24").

Average rainfall days
Bethlehem, CT

Average rainfall days - Bethlehem, CT

The month with the highest number of rainy days is June (17.7 days).
The months with the least rainy days are January and February (8.1 days).

Average snowfall
Bethlehem, CT

Average snowfall - Bethlehem, CT

The month with the highest snowfall is February (6.1").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Bethlehem, CT

Average snowfall days - Bethlehem, CT

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Bethlehem, CT

Average daylight / Average sunshine - Bethlehem, CT

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

Average sunshine days
Bethlehem, CT

Average sunshine days - Bethlehem, CT

The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is June (10.5 days).

Average UV index
Bethlehem, CT

Average UV index - Bethlehem, CT

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average visibility
Bethlehem, CT

Average visibility - Bethlehem, CT

The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).

Bethlehem, Connecticut, USA

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