Boise September Weather Averages Idaho, United States of America

September Weather Averages for Boise

High Temp	26°C	78°F
Low Temp	13°C	56°F
Avg Temp	19°C	67°F
Sunshine Hours	301 hours
Rainfall	13.80 mm	0.54 In
Rain days	1 days
Pressure	1013 mb	30 In

Boise September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	28°C / 82°F	14°C / 58°F	20°C / 69°F	337 hours	0.00 mm / 0.00 In	0 days	1015 mb / 30 In
2010	25°C / 77°F	12°C / 53°F	18°C / 64°F	317 hours	0.80 mm / 0.03 In	0 days	1014 mb / 30 In
2011	27°C / 81°F	14°C / 57°F	20°C / 69°F	357 hours	0.90 mm / 0.04 In	0 days	1016 mb / 30 In
2012	26°C / 79°F	13°C / 56°F	19°C / 67°F	344 hours	0.30 mm / 0.01 In	0 days	1016 mb / 30 In
2013	23°C / 74°F	13°C / 56°F	18°C / 65°F	262 hours	42.32 mm / 1.67 In	6 days	1012 mb / 30 In
2014	25°C / 77°F	13°C / 56°F	19°C / 66°F	311 hours	32.80 mm / 1.29 In	3 days	1013 mb / 30 In
2015	25°C / 78°F	13°C / 56°F	19°C / 66°F	271 hours	17.10 mm / 0.67 In	1 days	1013 mb / 30 In
2016	23°C / 73°F	12°C / 53°F	17°C / 63°F	287 hours	6.20 mm / 0.24 In	2 days	1015 mb / 30 In
2017	24°C / 75°F	13°C / 56°F	18°C / 65°F	290 hours	12.30 mm / 0.48 In	2 days	1014 mb / 30 In
2018	25°C / 76°F	13°C / 55°F	19°C / 65°F	316 hours	0.60 mm / 0.02 In	0 days	1013 mb / 30 In
2019	23°C / 74°F	12°C / 54°F	18°C / 64°F	309 hours	22.20 mm / 0.87 In	3 days	1013 mb / 30 In
2020	27°C / 81°F	14°C / 57°F	21°C / 69°F	324 hours	1.90 mm / 0.07 In	0 days	1016 mb / 30 In
2021	27°C / 81°F	13°C / 56°F	20°C / 68°F	318 hours	12.04 mm / 0.47 In	3 days	1013 mb / 30 In
2022	29°C / 84°F	15°C / 59°F	22°C / 71°F	283 hours	1.00 mm / 0.04 In	0 days	1012 mb / 30 In
2023	25°C / 78°F	12°C / 54°F	19°C / 65°F	261 hours	39.18 mm / 1.54 In	3 days	1012 mb / 30 In
2024	26°C / 80°F	15°C / 59°F	20°C / 68°F	277 hours	24.12 mm / 0.95 In	1 days	1012 mb / 30 In
2025	28°C / 82°F	14°C / 58°F	21°C / 69°F	254 hours	20.90 mm / 0.82 In	0 days	1005 mb / 30 In

Idaho

Hotels Near Boise

Cities Near Boise

Quick and Easy Signup for Weather API

WeatherAPI.com makes it super easy to integrate our realtime, daily, hourly and 15 min interval weather forecast data, historical weather, marine weather, bulk request, air quality data, pollen, evapotranspiration, autocomplete, time zone, astronomy and sports data into your new or existing project.

Get Started