Bethlehem (PA) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Bethlehem

Bethlehem average temperature chart (Celsius) Bethlehem average temperature chart (Fahrenheit)
Average monthly temperatures in Bethlehem (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 1.5 3.2 9.2 15.6 21.6 26.5 28.9 27.8 23.8 17.6 11 4.2
°F 34.7 37.8 48.6 60.1 70.9 79.6 84.1 82 74.8 63.7 51.8 39.6

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Bethlehem monthly rainfall chart (mm) Bethlehem monthly rainfall chart (inches)
Average monthly rainfall in Bethlehem (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 83 75 89 93 108 96 109 110 101 78 100 91
inches 3.3 3 3.5 3.7 4.2 3.8 4.3 4.3 4 3.1 3.9 3.6
Rainy days 11 10 11 11 12 11 10 10 9 8 11 11

Average annual rainfall in Bethlehem: 1097.966mm (432.3 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Bethlehem

Bethlehem average daily sunshine chart
Average daily sunshine Bethlehem
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.3 6.1 6.9 7.8 8.5 9.6 9.7 9 7.6 6.8 4.9 4.4

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Bethlehem average minimum / maximum temperatures (Celsius) Bethlehem average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Bethlehem (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -7.3 -6.3 -1.3 3.7 9.5 14.7 17.4 16.6 12.2 5.7 1.2 -4.2
Max °C 1.7 3.5 9.5 15.9 21.9 26.8 29.2 28.1 24.1 17.9 11.3 4.4
Min °F 18.9 20.8 29.7 38.7 49.1 58.4 63.3 61.8 53.9 42.3 34.1 24.4
Max °F 27 29.5 39.4 49.6 60.3 69.3 73.9 72.1 64.6 53.2 43.2 32.2

Sea temperature

The graph below shows the average sea temperature.

Bethlehem average sea temperature chart (Celsius) Bethlehem average sea temperature chart (Fahrenheit)
Average sea temperature around Bethlehem in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 3.2 1.3 1.8 4.8 9.9 16.3 21.8 23.2 21 16.4 11.2 6.7
°F 37.8 34.3 35.2 40.7 49.8 61.4 71.2 73.8 69.9 61.5 52.2 44

Wind speed

The graph below shows the average wind speed.

Bethlehem average winspeed by month (km/h) Bethlehem average winspeed by month (mph)
Average wind speed in Bethlehem (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 17 18 18 18 16 14 13 12 13 14 16 17
mph 11 11 11 11 10 9 8 8 8 9 10 10

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Bethlehem relative humidity averages
Average relative humidity in Bethlehem
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
68% 66% 63% 61% 66% 68% 69% 72% 74% 72% 70% 70%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Bethlehem weather stats

Bethlehem weather statistics
Hottest month: July 28.9°C 84°F
Driest month: February 75mm 3ins
Sunniest month: July 9.7hrs
Coldest month: January 1.5°C 34.7°F
Wettest month: August 110mm 4.3ins
Warmest sea: August 23.2°C 73.8°F
Map showing location of Bethlehem (40.62593, -75.37046) Bethlehem map pin © Google

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