Thornton (CO) monthly weather averages

Contents

Average daytime temperature

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

Thornton average temperature chart (Celsius) Thornton average temperature chart (Fahrenheit)
Average monthly temperatures in Thornton (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.8 8 11 16.3 21.2 26.9 30.6 29.3 24.4 18.7 10.9 6.6
°F 42.5 46.4 51.8 61.3 70.2 80.5 87 84.7 75.9 65.6 51.7 43.9

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.

Thornton monthly rainfall chart (mm) Thornton monthly rainfall chart (inches)
Average monthly rainfall in Thornton (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 12 16 33 44 71 44 50 37 32 25 23 14
inches 0.5 0.6 1.3 1.7 2.8 1.7 2 1.5 1.2 1 0.9 0.6
Rainy days 6 6 9 8 11 9 9 9 7 5 5 6

Average annual rainfall in Thornton: 335.7mm (132.2 inches)

Average daily sunshine

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

Thornton average daily sunshine chart
Average daily sunshine Thornton
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 7.5 8.1 8.9 9.9 10.1 11.3 11.3 10.6 9.8 8.7 7.1 7

Day / night temperatures

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

Thornton average minimum / maximum temperatures (Celsius) Thornton average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Thornton (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -8.8 -6.4 -3.4 1.4 6.4 11.3 14.7 13.6 8.7 2.6 -3.5 -7.8
Max °C 6.2 8.4 11.4 16.7 21.6 27.3 31 29.7 24.8 19.1 11.3 7
Min °F 16.2 20.6 26 34.4 43.5 52.3 58.4 56.4 47.6 36.6 25.7 18.1
Max °F 29.7 33.8 39.2 48.2 57.2 66.7 73 70.9 62.1 51.4 39 31.3

Sea temperature

The graph below shows the average sea temperature.

Thornton average sea temperature chart (Celsius) Thornton average sea temperature chart (Fahrenheit)
Average sea temperature around Thornton in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 11 10.7 11.1 11.8 13.3 15.2 17.3 19.1 18.3 16 13.6 11.9
°F 51.7 51.3 51.9 53.3 55.9 59.3 63.2 66.4 65 60.7 56.6 53.4

Wind speed

The graph below shows the average wind speed.

Thornton average winspeed by month (km/h) Thornton average winspeed by month (mph)
Average wind speed in Thornton (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 16 17 18 17 16 15 14 15 15 15 16
mph 10 10 11 11 11 10 9 9 9 9 9 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.

Thornton relative humidity averages
Average relative humidity in Thornton
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
55% 56% 54% 50% 52% 49% 48% 49% 50% 49% 56% 57%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Thornton weather stats

Thornton weather statistics
Hottest month: July 30.6°C 87.1°F
Driest month: January 12mm 0.5ins
Sunniest month: September 9.8hrs
Coldest month: January 5.8°C 42.4°F
Wettest month: May 71mm 2.8ins
Warmest sea: August 19.1°C 66.4°F
Map showing location of Thornton (39.86804, -104.97192) Thornton map pin © Google

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