Startup September Weather Averages Washington, United States of America

September Weather Averages for Startup

High Temp	21°C	70°F
Low Temp	11°C	51°F
Avg Temp	16°C	60°F
Sunshine Hours	199 hours
Rainfall	113.20 mm	4.46 In
Rain days	7 days
Pressure	1016 mb	30 In

Startup September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	22°C / 71°F	10°C / 49°F	15°C / 59°F	254 hours	105.37 mm / 4.15 In	5 days	1017 mb / 31 In
2010	20°C / 67°F	9°C / 48°F	14°C / 57°F	131 hours	178.97 mm / 7.05 In	14 days	1015 mb / 30 In
2011	23°C / 74°F	10°C / 49°F	16°C / 61°F	252 hours	67.63 mm / 2.66 In	5 days	1017 mb / 30 In
2012	23°C / 74°F	9°C / 47°F	15°C / 59°F	307 hours	12.60 mm / 0.50 In	1 days	1019 mb / 31 In
2013	21°C / 69°F	10°C / 51°F	15°C / 59°F	193 hours	247.23 mm / 9.73 In	11 days	1012 mb / 30 In
2014	22°C / 72°F	11°C / 52°F	16°C / 61°F	229 hours	84.91 mm / 3.34 In	4 days	1015 mb / 30 In
2015	19°C / 67°F	8°C / 47°F	13°C / 56°F	191 hours	66.90 mm / 2.63 In	8 days	1016 mb / 30 In
2016	19°C / 66°F	8°C / 47°F	13°C / 56°F	201 hours	125.35 mm / 4.94 In	5 days	1018 mb / 31 In
2017	23°C / 73°F	12°C / 53°F	17°C / 62°F	231 hours	96.66 mm / 3.81 In	7 days	1015 mb / 30 In
2018	20°C / 68°F	10°C / 50°F	15°C / 58°F	195 hours	80.66 mm / 3.18 In	7 days	1016 mb / 30 In
2019	19°C / 66°F	11°C / 52°F	15°C / 58°F	140 hours	181.43 mm / 7.14 In	13 days	1015 mb / 30 In
2020	24°C / 75°F	13°C / 56°F	18°C / 65°F	223 hours	161.79 mm / 6.37 In	6 days	1016 mb / 30 In
2021	20°C / 68°F	11°C / 52°F	15°C / 60°F	154 hours	147.00 mm / 5.79 In	10 days	1017 mb / 30 In
2022	24°C / 76°F	12°C / 54°F	18°C / 64°F	234 hours	8.10 mm / 0.32 In	1 days	1015 mb / 30 In
2023	21°C / 70°F	11°C / 51°F	15°C / 59°F	178 hours	151.49 mm / 5.96 In	6 days	1016 mb / 30 In
2024	21°C / 69°F	12°C / 54°F	16°C / 61°F	119 hours	94.73 mm / 3.73 In	4 days	1016 mb / 30 In
2025	22°C / 71°F	14°C / 57°F	18°C / 64°F	152 hours	113.50 mm / 4.47 In	6 days	1016 mb / 30 In

Washington

Hotels Near Startup

Cities Near Startup

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