Johnstown (PA) monthly weather averages

Contents

Average daytime temperature

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

Johnstown average temperature chart (Celsius) Johnstown average temperature chart (Fahrenheit)
Average monthly temperatures in Johnstown (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 1 2.8 8.8 15.5 21.5 26.1 28.3 27.2 23.4 16.9 10.2 3.5
°F 33.9 37.1 47.9 60 70.7 79 82.9 81 74.1 62.4 50.4 38.4

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.

Johnstown monthly rainfall chart (mm) Johnstown monthly rainfall chart (inches)
Average monthly rainfall in Johnstown (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 89 85 104 100 110 111 124 101 92 78 93 90
inches 3.5 3.3 4.1 3.9 4.3 4.4 4.9 4 3.6 3.1 3.6 3.5
Rainy days 16 14 15 14 14 12 12 11 11 11 14 16

Average annual rainfall in Johnstown: 1136.633mm (447.5 inches)

Average daily sunshine

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

Johnstown average daily sunshine chart
Average daily sunshine Johnstown
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 3.8 4.7 5.9 7 8 8.9 8.9 8 7 5.9 3.7 3

Day / night temperatures

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

Johnstown average minimum / maximum temperatures (Celsius) Johnstown average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Johnstown (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -7.9 -7.1 -2.3 3.2 8.4 12.8 15.2 14.3 10.7 4.4 0.4 -5
Max °C 1.3 3.1 9.1 15.9 21.8 26.5 28.6 27.6 23.7 17.2 10.5 3.8
Min °F 17.9 19.3 27.9 37.7 47.1 55 59.4 57.7 51.3 39.9 32.6 23.1
Max °F 26.1 28.4 38.1 49.1 59.2 67.3 71.4 69.6 63 51.4 41.7 30.9

Sea temperature

The graph below shows the average sea temperature.

Johnstown average sea temperature chart (Celsius) Johnstown average sea temperature chart (Fahrenheit)
Average sea temperature around Johnstown in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.2 3 3.3 5.6 10.3 17 22.2 23.3 21.2 16.3 11.2 6.9
°F 39.5 37.5 37.9 42.1 50.5 62.6 71.9 74 70.1 61.3 52.2 44.4

Wind speed

The graph below shows the average wind speed.

Johnstown average winspeed by month (km/h) Johnstown average winspeed by month (mph)
Average wind speed in Johnstown (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 17 17 17 17 14 13 12 11 12 13 16 16
mph 10 10 11 10 9 8 7 7 7 8 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.

Johnstown relative humidity averages
Average relative humidity in Johnstown
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
70% 69% 66% 63% 67% 71% 73% 76% 76% 72% 72% 73%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Johnstown weather stats

Johnstown weather statistics
Hottest month: July 28.3°C 82.9°F
Driest month: October 78mm 3.1ins
Sunniest month: July 8.9hrs
Coldest month: January 1°C 33.8°F
Wettest month: July 124mm 4.9ins
Warmest sea: August 23.3°C 73.9°F
Map showing location of Johnstown (40.32674, -78.92197) Johnstown map pin © Google

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