Boise (ID) monthly weather averages

Contents

Average daytime temperature

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

Boise average temperature chart (Celsius) Boise average temperature chart (Fahrenheit)
Average monthly temperatures in Boise (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2 6.5 11.4 16 21.4 26.8 31.9 30.9 24.7 17.8 8.9 2.8
°F 35.6 43.7 52.5 60.8 70.6 80.3 89.4 87.6 76.5 64 48 37

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.

Boise monthly rainfall chart (mm) Boise monthly rainfall chart (inches)
Average monthly rainfall in Boise (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 38 28 32 30 27 21 8 10 19 19 38 36
inches 1.5 1.1 1.3 1.2 1.1 0.8 0.3 0.4 0.7 0.8 1.5 1.4
Rainy days 12 10 10 8 7 6 3 3 4 6 10 11

Average annual rainfall in Boise: 234.533mm (92.3 inches)

Average daily sunshine

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

Boise average daily sunshine chart
Average daily sunshine Boise
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4 5.9 8.1 9.8 11.3 12.3 13.8 12.4 10.8 8.3 4.4 3.8

Day / night temperatures

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

Boise average minimum / maximum temperatures (Celsius) Boise average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Boise (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -6.2 -3 -0.5 2.3 6.4 10.8 13.9 13.3 8.3 3.3 -1 -5.6
Max °C 2.2 6.8 11.7 16.4 21.8 27.2 32.4 31.3 25.1 18.2 9.2 3
Min °F 20.8 26.7 31.2 36.1 43.5 51.4 56.9 55.9 46.9 37.9 30.3 21.9
Max °F 28.4 35.4 42.1 48.7 57.4 66.2 73.6 72.1 62.1 51.3 39.4 29.7

Sea temperature

The graph below shows the average sea temperature.

Boise average sea temperature chart (Celsius) Boise average sea temperature chart (Fahrenheit)
Average sea temperature around Boise in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9.6 9.5 9.5 9.8 10.6 12.1 13.9 15 14.5 13.1 11.5 10.1
°F 49.2 49 49.2 49.6 51.1 53.8 56.9 58.9 58.2 55.6 52.6 50.3

Wind speed

The graph below shows the average wind speed.

Boise average winspeed by month (km/h) Boise average winspeed by month (mph)
Average wind speed in Boise (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 13 14 16 17 16 15 14 14 14 13 14 13
mph 8 9 10 10 10 9 9 9 9 8 9 8

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.

Boise relative humidity averages
Average relative humidity in Boise
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
75% 70% 60% 52% 49% 45% 36% 37% 45% 54% 69% 75%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Boise weather stats

Boise weather statistics
Hottest month: July 31.9°C 89.4°F
Driest month: July 8mm 0.3ins
Sunniest month: July 13.8hrs
Coldest month: January 2°C 35.6°F
Wettest month: November 38mm 1.5ins
Warmest sea: August 15°C 59°F
Map showing location of Boise (43.6135, -116.20345) Boise map pin © Google

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