October weather forecast and climate
Boise, ID

The golden fall season in Boise, Idaho, with the tall city buildings in view
The golden fall season in Boise, Idaho, with the tall city buildings in view

What is the temperature in October in Boise?

The average high-temperature, in October, in Boise, is 64.8°F (18.2°C), while the average low-temperature is 40.8°F (4.9°C).

How much does it rain in Boise in October?

In Boise, in October, during 5.5 rainfall days, typically, 0.8" (19.1mm) of precipitation is accumulated.

When does it start snowing in Boise?

October is the first month it typically snows in Boise. Throughout October, in the average 0.1 snowfall days, it receives 0.1" (2.5mm) of snow.
Average temperature in October - Boise, ID
  • Average high temperature in October: 18.2°C

The warmest month (with the highest average high temperature) is July (32.9°C).
The month with the lowest average high temperature is December (3.1°C).

  • Average low temperature in October: 4.9°C

The month with the highest average low temperature is July (15.8°C).
The coldest month (with the lowest average low temperature) is December (-4.4°C).

Average humidity in October - Boise, ID
  • Average humidity in October: 53.6%

The month with the highest relative humidity is January (75%).
The month with the lowest relative humidity is July (36.1%).

Average rainfall in October - Boise, ID
  • Average rainfall in October: 19.1mm

The wettest month (with the highest rainfall) is December (39.4mm).
The driest month (with the lowest rainfall) is August (6.1mm).

Average rainfall days in October - Boise, ID
  • Average rainfall days in October: 5.5 days

The month with the highest number of rainy days is December (11.8 days).
The month with the lowest number of rainy days is August (2.4 days).

Average snowfall in October - Boise, ID
  • Average snowfall in October: 2.5mm

The month with the highest snowfall is December (177.8mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

Average snowfall days in October - Boise, ID
  • Average snowfall days in October: 0.1 days

The month with the highest number of snowfall days is December (6 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average daylight in October / Average sunshine in October - Boise, ID
  • Average daylight in October: 11h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in October: 7.7h

The month with most sunshine is July (Average sunshine: 12.9h).
The month with least sunshine is December (Average sunshine: 3.4h).

Average UV index in October - Boise, ID
  • Average UV index in October: 4

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).

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