Washington September Weather Averages Illinois, United States of America

September Weather Averages for Washington

High Temp	25°C	77°F
Low Temp	14°C	58°F
Avg Temp	19°C	67°F
Sunshine Hours	244 hours
Rainfall	74.95 mm	2.95 In
Rain days	5 days
Pressure	1017 mb	30 In

Washington September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	24°C / 75°F	13°C / 56°F	18°C / 65°F	232 hours	31.80 mm / 1.25 In	3 days	1018 mb / 31 In
2010	24°C / 75°F	14°C / 57°F	19°C / 65°F	244 hours	126.70 mm / 4.99 In	6 days	1015 mb / 30 In
2011	21°C / 70°F	12°C / 54°F	16°C / 61°F	234 hours	80.00 mm / 3.15 In	6 days	1016 mb / 30 In
2012	23°C / 73°F	12°C / 54°F	17°C / 63°F	250 hours	133.14 mm / 5.24 In	4 days	1016 mb / 30 In
2013	26°C / 79°F	14°C / 58°F	20°C / 68°F	280 hours	44.91 mm / 1.77 In	5 days	1015 mb / 30 In
2014	23°C / 74°F	12°C / 54°F	18°C / 64°F	260 hours	99.13 mm / 3.90 In	6 days	1018 mb / 31 In
2015	27°C / 80°F	16°C / 61°F	21°C / 70°F	224 hours	45.51 mm / 1.79 In	5 days	1017 mb / 31 In
2016	25°C / 77°F	16°C / 61°F	21°C / 69°F	225 hours	69.21 mm / 2.72 In	7 days	1017 mb / 31 In
2017	27°C / 80°F	15°C / 59°F	20°C / 69°F	301 hours	15.56 mm / 0.61 In	2 days	1017 mb / 31 In
2018	25°C / 77°F	16°C / 61°F	20°C / 68°F	204 hours	77.79 mm / 3.06 In	5 days	1018 mb / 31 In
2019	26°C / 78°F	17°C / 63°F	21°C / 70°F	212 hours	168.85 mm / 6.65 In	9 days	1016 mb / 30 In
2020	23°C / 74°F	13°C / 56°F	18°C / 65°F	223 hours	84.07 mm / 3.31 In	7 days	1017 mb / 31 In
2021	27°C / 81°F	16°C / 61°F	21°C / 70°F	281 hours	37.30 mm / 1.47 In	3 days	1015 mb / 30 In
2022	26°C / 80°F	14°C / 58°F	20°C / 68°F	254 hours	56.80 mm / 2.24 In	4 days	1017 mb / 31 In
2023	29°C / 84°F	14°C / 57°F	21°C / 69°F	223 hours	89.54 mm / 3.53 In	4 days	1017 mb / 30 In
2024	27°C / 81°F	15°C / 58°F	21°C / 69°F	251 hours	38.94 mm / 1.53 In	2 days	1017 mb / 30 In

Illinois

Hotels Near Washington

Cities Near Washington

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, autocomplete, time zone, astronomy and sports data into your new or existing project.

Get Started