Thunder Bay September Weather Averages Ontario, Canada

September Weather Averages for Thunder Bay

High Temp	17°C	63°F
Low Temp	10°C	50°F
Avg Temp	14°C	56°F
Sunshine Hours	195 hours
Rainfall	90.92 mm	3.58 In
Rain days	6 days
Pressure	1015 mb	30 In

Thunder Bay September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	17°C / 62°F	10°C / 51°F	14°C / 56°F	197 hours	127.45 mm / 5.02 In	5 days	1017 mb / 31 In
2009	19°C / 66°F	12°C / 54°F	15°C / 60°F	243 hours	34.09 mm / 1.34 In	2 days	1018 mb / 31 In
2010	14°C / 57°F	8°C / 46°F	11°C / 52°F	191 hours	152.60 mm / 6.01 In	8 days	1013 mb / 30 In
2011	17°C / 63°F	10°C / 49°F	13°C / 56°F	234 hours	71.31 mm / 2.81 In	5 days	1015 mb / 30 In
2012	16°C / 61°F	9°C / 48°F	13°C / 55°F	220 hours	15.00 mm / 0.59 In	3 days	1013 mb / 30 In
2013	17°C / 63°F	10°C / 50°F	14°C / 57°F	222 hours	129.12 mm / 5.08 In	8 days	1014 mb / 30 In
2014	15°C / 59°F	8°C / 46°F	12°C / 53°F	172 hours	112.03 mm / 4.41 In	8 days	1015 mb / 30 In
2015	18°C / 65°F	12°C / 53°F	15°C / 59°F	205 hours	58.42 mm / 2.30 In	5 days	1016 mb / 30 In
2016	19°C / 66°F	12°C / 54°F	15°C / 59°F	186 hours	102.28 mm / 4.03 In	10 days	1015 mb / 30 In
2017	17°C / 63°F	11°C / 51°F	14°C / 57°F	165 hours	117.84 mm / 4.64 In	7 days	1015 mb / 30 In
2018	16°C / 61°F	9°C / 49°F	13°C / 55°F	177 hours	158.79 mm / 6.25 In	9 days	1017 mb / 31 In
2019	15°C / 60°F	10°C / 51°F	13°C / 55°F	132 hours	136.27 mm / 5.36 In	8 days	1014 mb / 30 In
2020	15°C / 60°F	9°C / 48°F	12°C / 53°F	197 hours	48.67 mm / 1.92 In	7 days	1014 mb / 30 In
2021	18°C / 65°F	11°C / 52°F	14°C / 58°F	205 hours	83.64 mm / 3.29 In	8 days	1013 mb / 30 In
2022	18°C / 64°F	10°C / 50°F	14°C / 56°F	179 hours	118.20 mm / 4.65 In	6 days	1016 mb / 30 In
2023	20°C / 68°F	11°C / 51°F	15°C / 58°F	183 hours	70.95 mm / 2.79 In	1 days	1017 mb / 31 In
2024	21°C / 70°F	12°C / 53°F	16°C / 61°F	210 hours	45.46 mm / 1.79 In	2 days	1016 mb / 30 In

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