Longmont September Weather Averages Colorado, United States of America

September Weather Averages for Longmont

High Temp	26°C	79°F
Low Temp	12°C	53°F
Avg Temp	19°C	65°F
Sunshine Hours	299 hours
Rainfall	40.10 mm	1.58 In
Rain days	4 days
Pressure	1015 mb	30 In

Longmont September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	22°C / 72°F	10°C / 49°F	16°C / 60°F	326 hours	36.81 mm / 1.45 In	5 days	1018 mb / 31 In
2009	23°C / 73°F	11°C / 51°F	16°C / 61°F	308 hours	39.20 mm / 1.54 In	5 days	1018 mb / 31 In
2010	27°C / 81°F	11°C / 52°F	19°C / 65°F	348 hours	1.00 mm / 0.04 In	0 days	1015 mb / 30 In
2011	23°C / 73°F	11°C / 52°F	17°C / 62°F	292 hours	52.80 mm / 2.08 In	4 days	1019 mb / 31 In
2012	25°C / 76°F	12°C / 54°F	18°C / 64°F	313 hours	48.80 mm / 1.92 In	4 days	1018 mb / 31 In
2013	24°C / 75°F	13°C / 55°F	18°C / 64°F	270 hours	176.43 mm / 6.95 In	11 days	1013 mb / 30 In
2014	24°C / 75°F	12°C / 53°F	17°C / 63°F	305 hours	38.67 mm / 1.52 In	5 days	1015 mb / 30 In
2015	27°C / 81°F	13°C / 56°F	20°C / 68°F	285 hours	4.60 mm / 0.18 In	1 days	1015 mb / 30 In
2016	25°C / 76°F	11°C / 52°F	18°C / 64°F	311 hours	11.90 mm / 0.47 In	3 days	1016 mb / 30 In
2017	24°C / 75°F	12°C / 53°F	18°C / 64°F	268 hours	47.20 mm / 1.86 In	6 days	1015 mb / 30 In
2018	26°C / 80°F	13°C / 55°F	19°C / 67°F	301 hours	7.50 mm / 0.30 In	2 days	1015 mb / 30 In
2019	27°C / 81°F	14°C / 57°F	20°C / 68°F	327 hours	23.82 mm / 0.94 In	3 days	1014 mb / 30 In
2020	26°C / 79°F	10°C / 50°F	18°C / 64°F	299 hours	47.43 mm / 1.87 In	3 days	1018 mb / 31 In
2021	29°C / 84°F	13°C / 55°F	21°C / 69°F	299 hours	18.87 mm / 0.74 In	3 days	1012 mb / 30 In
2022	29°C / 83°F	12°C / 53°F	20°C / 68°F	269 hours	28.20 mm / 1.11 In	4 days	1014 mb / 30 In
2023	28°C / 83°F	10°C / 51°F	19°C / 67°F	298 hours	18.44 mm / 0.73 In	0 days	1013 mb / 30 In
2024	29°C / 83°F	13°C / 55°F	20°C / 68°F	286 hours	76.75 mm / 3.02 In	3 days	1013 mb / 30 In

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