Climate

Located in the heart of the Boise Valley and at an elevation of 2440-2470 feet, Nampa enjoys a mild climate year round. Its high desert location is bordered to the north by the Front Range of the Rocky Mountains and to the south by the Owyhee Mountains. On average, there are 210 sunny days per year in Nampa, ID.

Climate	Nampa, ID
Annual Rainfall (inches)	11.6
Max. Rainfall within 24 hours (inches)	1-2
Annual Snowfall (inches)	19.1
Max. Snowfall within 24 hours (inches)	3-4
Precipitation Days	86
Number of days of elevated smog conditions	Low
Number of days of poor visibility and low ceiling	January is month with lowest average visibility at 6.1 miles. July visibility averages 10 miles.
Prevailing winds direction	27% from SE, 22% from the NW, & 10% from W
Mean wind speed by month	January 7mph, April 9mph, July 8mph, October 7mph
Peak gust speed by month and year	Highest average wind speed of 9mph occurs around March 25, where average daily max is 17mph. Over course of year, wind speeds vary from 0-17mph, rarely exceeding 24mph
Sunny Days	210
Avg. July High	91
Avg. Jan Low	21.1
Humidity Factors By Month	Low Humidity. Highest levels in winter. January - 67%, April 30%, July 17%, October 30%
UV Index	4
Elevation ft.	2440-2470

Natural Disaster	Frequency	Severity/Rating
Floods	Rare
Tornadoes	No historical tornado events	Tornado Index Boise City/Nampa 12.94 US 136.45
Hail Storms	Rare
Hurricanes	Rare
Other Major Storms	In past 60 years - Rare thunderstorms with wind and hail Wildfire, in region
Earthquakes	Rare	No historical earthquakes above 3.5 magnitude or above