Lewistown September Weather Averages Montana, United States of America

September Weather Averages for Lewistown

High Temp	21°C	70°F
Low Temp	9°C	48°F
Avg Temp	15°C	59°F
Sunshine Hours	268 hours
Rainfall	58.57 mm	2.31 In
Rain days	4 days
Pressure	1013 mb	30 In

Lewistown September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	19°C / 67°F	7°C / 44°F	13°C / 55°F	241 hours	48.50 mm / 1.91 In	4 days	1016 mb / 30 In
2009	24°C / 76°F	10°C / 50°F	17°C / 62°F	315 hours	31.74 mm / 1.25 In	3 days	1014 mb / 30 In
2010	19°C / 66°F	6°C / 43°F	12°C / 53°F	209 hours	54.68 mm / 2.15 In	8 days	1013 mb / 30 In
2011	23°C / 73°F	8°C / 47°F	15°C / 59°F	302 hours	9.50 mm / 0.37 In	1 days	1016 mb / 30 In
2012	22°C / 71°F	8°C / 47°F	15°C / 59°F	325 hours	6.30 mm / 0.25 In	2 days	1016 mb / 30 In
2013	21°C / 70°F	9°C / 49°F	15°C / 59°F	256 hours	71.10 mm / 2.80 In	7 days	1010 mb / 30 In
2014	19°C / 66°F	7°C / 45°F	13°C / 55°F	266 hours	33.30 mm / 1.31 In	4 days	1014 mb / 30 In
2015	22°C / 71°F	10°C / 50°F	16°C / 60°F	264 hours	28.70 mm / 1.13 In	3 days	1012 mb / 30 In
2016	18°C / 65°F	8°C / 47°F	13°C / 55°F	251 hours	74.95 mm / 2.95 In	4 days	1015 mb / 30 In
2017	20°C / 68°F	9°C / 48°F	14°C / 57°F	247 hours	79.80 mm / 3.14 In	3 days	1014 mb / 30 In
2018	18°C / 65°F	8°C / 46°F	13°C / 55°F	245 hours	65.10 mm / 2.56 In	8 days	1015 mb / 30 In
2019	18°C / 65°F	8°C / 47°F	13°C / 56°F	217 hours	83.31 mm / 3.28 In	10 days	1012 mb / 30 In
2020	23°C / 73°F	9°C / 49°F	16°C / 61°F	315 hours	19.71 mm / 0.78 In	1 days	1015 mb / 30 In
2021	24°C / 75°F	10°C / 50°F	17°C / 62°F	291 hours	1.80 mm / 0.07 In	0 days	1012 mb / 30 In
2022	25°C / 76°F	11°C / 52°F	17°C / 63°F	244 hours	25.40 mm / 1.00 In	3 days	1014 mb / 30 In
2023	23°C / 73°F	9°C / 48°F	15°C / 60°F	253 hours	137.15 mm / 5.40 In	6 days	1013 mb / 30 In
2024	24°C / 75°F	11°C / 51°F	17°C / 63°F	289 hours	214.55 mm / 8.45 In	1 days	1011 mb / 30 In

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