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Helena weather in September

Weather in Helena: September


	Average day temperature:	69.4°F
	Average night temperature:	50.4°F

	Number of sunny days:	20 days
	Day length:	11.7 - 13.3 hours

	Number of rainy days:	1 day
	Precipitation totals:	0.5 in.

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14 days
forecast

Helena

weather in
October

Helena

January
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May
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July
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September
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2024

2023

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112

Day temperature

Night temperature

The highest day temperature during September of 2024 was 84°F. At the same time the lowest night temperature was 33°F. Daily and nightly averages during September were 69.8°F and 49.8°F.

	Sunny days
	Partly cloudy days
	Cloudy days

67%

20%

13%

Mostly all days in September are sunny but cloudy days are also possible.

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

0.2

0.5

0.7

1.0

1.2

1.5

1.7

1.5

1.4

1.5

1.4

Precipitation total value in Helena in September is 0.5 in. Other months of the year show relatively similar values.

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

1.1

2.1

3.2

4.2

5.3

6.3

7.4

4.5

4.8

4.9

4.7

4.8

5.4

5.8

6.2

5.6

5.0

4.0

4.5

4.8

4.9

4.8

4.7

4.8

5.4

5.8

6.2

5.6

5.0

4.0

The average wind speed value in September is 4.8 mph

jan

feb

mar

apr

may

jun

jul

aug

sep

oct

nov

dec

0.0

2.1

4.3

6.4

8.6

10.7

12.8

15.0

4.4

5.1

7.1

10.8

12.5

10.5

8.3

7.3

6.3

4.9

4.5

4.4

5.1

7.1

9.0

10.8

12.5

10.5

8.3

7.3

6.3

4.9

4.5

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 9.0.