Newcastle (WY) monthly weather averages

Average daytime temperature

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

Newcastle average temperature chart (Celsius) Newcastle average temperature chart (Fahrenheit)
Average monthly temperatures in Newcastle (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -0.3 2.3 6.7 13.3 19.1 24.6 29.2 27.7 21.8 15.3 6.1 0.7
°F 31.5 36.2 44.1 55.9 66.4 76.2 84.6 81.9 71.2 59.5 42.9 33.2

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.

Newcastle monthly rainfall chart (mm) Newcastle monthly rainfall chart (inches)
Average monthly rainfall in Newcastle (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 11 14 19 40 65 67 49 40 29 23 15 15
inches 0.4 0.6 0.8 1.6 2.5 2.6 1.9 1.6 1.1 0.9 0.6 0.6
Rainy days 8 8 9 10 12 12 10 8 8 6 7 8

Average annual rainfall in Newcastle: 325.667mm (128.2 inches)

Average daily sunshine

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

Newcastle average daily sunshine chart
Average daily sunshine Newcastle
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6 7.1 8.1 8.9 9.4 11 11.6 11 9.3 7.8 5.8 5.7

Day / night temperatures

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

Newcastle average minimum / maximum temperatures (Celsius) Newcastle average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Newcastle (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -11.6 -9.4 -5.7 -0.2 5.4 10.5 14.4 12.9 7.1 1.2 -5.4 -10.6
Max °C 0 2.6 7.1 13.6 19.5 24.9 29.6 28.1 22.2 15.6 6.4 1
Min °F 11.1 15.1 21.8 31.6 41.6 50.9 57.9 55.2 44.7 34.2 22.4 13
Max °F 21.6 25.9 33.3 44.1 54.3 63.9 71.6 68.9 58.3 47.1 32.9 23.4

Sea temperature

The graph below shows the average sea temperature.

Newcastle average sea temperature chart (Celsius) Newcastle average sea temperature chart (Fahrenheit)
Average sea temperature around Newcastle in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.7 8.5 8.8 9.5 10.8 12.6 14.9 17 16.1 13.6 11.1 9.5
°F 47.6 47.3 47.8 49.1 51.4 54.7 58.8 62.5 61 56.4 52.1 49.1

Wind speed

The graph below shows the average wind speed.

Newcastle average winspeed by month (km/h) Newcastle average winspeed by month (mph)
Average wind speed in Newcastle (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 21 20 21 22 20 18 17 17 17 18 18 20
mph 13 12 13 14 13 11 10 10 11 11 11 12

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.

Newcastle relative humidity averages
Average relative humidity in Newcastle
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 65% 63% 58% 60% 59% 54% 51% 54% 56% 63% 65%