Boulder September Weather Averages Colorado, United States of America

September Weather Averages for Boulder

High Temp	24°C	74°F
Low Temp	11°C	52°F
Avg Temp	17°C	62°F
Sunshine Hours	297 hours
Rainfall	43.53 mm	1.71 In
Rain days	5 days
Pressure	1016 mb	30 In

Boulder September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	21°C / 71°F	9°C / 48°F	15°C / 58°F	327 hours	33.39 mm / 1.31 In	3 days	1018 mb / 31 In
2009	22°C / 71°F	9°C / 49°F	15°C / 59°F	308 hours	40.93 mm / 1.61 In	7 days	1018 mb / 31 In
2010	25°C / 77°F	10°C / 51°F	17°C / 63°F	343 hours	1.10 mm / 0.04 In	0 days	1015 mb / 30 In
2011	21°C / 70°F	10°C / 50°F	15°C / 59°F	292 hours	53.98 mm / 2.13 In	6 days	1019 mb / 31 In
2012	22°C / 72°F	11°C / 52°F	16°C / 61°F	317 hours	51.52 mm / 2.03 In	3 days	1018 mb / 31 In
2013	22°C / 71°F	11°C / 53°F	16°C / 61°F	273 hours	164.58 mm / 6.48 In	11 days	1014 mb / 30 In
2014	22°C / 72°F	11°C / 51°F	16°C / 60°F	305 hours	45.16 mm / 1.78 In	5 days	1016 mb / 30 In
2015	25°C / 76°F	12°C / 54°F	18°C / 64°F	286 hours	9.23 mm / 0.36 In	3 days	1015 mb / 30 In
2016	22°C / 71°F	10°C / 50°F	16°C / 60°F	303 hours	10.48 mm / 0.41 In	2 days	1017 mb / 31 In
2017	21°C / 69°F	10°C / 51°F	15°C / 59°F	261 hours	46.30 mm / 1.82 In	8 days	1016 mb / 30 In
2018	24°C / 75°F	11°C / 52°F	17°C / 63°F	310 hours	11.26 mm / 0.44 In	4 days	1015 mb / 30 In
2019	24°C / 75°F	13°C / 55°F	18°C / 64°F	322 hours	24.47 mm / 0.96 In	4 days	1014 mb / 30 In
2020	23°C / 74°F	10°C / 49°F	16°C / 62°F	300 hours	50.62 mm / 1.99 In	5 days	1019 mb / 31 In
2021	27°C / 81°F	13°C / 55°F	20°C / 67°F	298 hours	24.68 mm / 0.97 In	4 days	1013 mb / 30 In
2022	27°C / 80°F	12°C / 54°F	19°C / 66°F	273 hours	29.50 mm / 1.16 In	4 days	1015 mb / 30 In
2023	26°C / 78°F	12°C / 53°F	18°C / 64°F	293 hours	33.43 mm / 1.32 In	2 days	1014 mb / 30 In
2024	26°C / 78°F	14°C / 57°F	19°C / 67°F	266 hours	99.18 mm / 3.90 In	4 days	1014 mb / 30 In

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