Grinnell September Weather Averages Iowa, United States of America

September Weather Averages for Grinnell

High Temp	25°C	76°F
Low Temp	14°C	57°F
Avg Temp	19°C	66°F
Sunshine Hours	246 hours
Rainfall	95.36 mm	3.75 In
Rain days	5 days
Pressure	1016 mb	30 In

Grinnell September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	23°C / 73°F	13°C / 55°F	18°C / 64°F	241 hours	154.38 mm / 6.08 In	7 days	1019 mb / 31 In
2009	22°C / 72°F	12°C / 54°F	17°C / 63°F	232 hours	80.03 mm / 3.15 In	4 days	1018 mb / 31 In
2010	22°C / 72°F	12°C / 54°F	17°C / 63°F	215 hours	134.67 mm / 5.30 In	6 days	1015 mb / 30 In
2011	20°C / 68°F	11°C / 52°F	15°C / 60°F	222 hours	42.00 mm / 1.65 In	4 days	1017 mb / 31 In
2012	23°C / 73°F	11°C / 52°F	17°C / 62°F	288 hours	47.10 mm / 1.85 In	2 days	1016 mb / 30 In
2013	26°C / 79°F	14°C / 57°F	20°C / 68°F	277 hours	48.64 mm / 1.91 In	6 days	1015 mb / 30 In
2014	22°C / 71°F	12°C / 53°F	17°C / 62°F	232 hours	110.94 mm / 4.37 In	7 days	1017 mb / 31 In
2015	26°C / 78°F	16°C / 60°F	21°C / 69°F	229 hours	119.90 mm / 4.72 In	6 days	1016 mb / 30 In
2016	25°C / 77°F	15°C / 59°F	20°C / 68°F	241 hours	157.11 mm / 6.19 In	7 days	1017 mb / 31 In
2017	27°C / 81°F	15°C / 59°F	21°C / 69°F	290 hours	50.80 mm / 2.00 In	4 days	1016 mb / 30 In
2018	23°C / 73°F	15°C / 58°F	19°C / 65°F	183 hours	198.06 mm / 7.80 In	11 days	1018 mb / 31 In
2019	25°C / 78°F	16°C / 61°F	21°C / 69°F	211 hours	223.70 mm / 8.81 In	13 days	1015 mb / 30 In
2020	22°C / 71°F	12°C / 54°F	17°C / 62°F	238 hours	100.37 mm / 3.95 In	8 days	1017 mb / 31 In
2021	28°C / 83°F	15°C / 60°F	21°C / 71°F	289 hours	38.53 mm / 1.52 In	2 days	1013 mb / 30 In
2022	27°C / 80°F	14°C / 58°F	20°C / 68°F	265 hours	47.20 mm / 1.86 In	4 days	1016 mb / 30 In
2023	30°C / 86°F	13°C / 56°F	21°C / 70°F	246 hours	74.41 mm / 2.93 In	1 days	1015 mb / 30 In
2024	27°C / 81°F	14°C / 57°F	20°C / 68°F	278 hours	52.34 mm / 2.06 In	2 days	1017 mb / 30 In

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