September weather forecast
Jordan, MT

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Weather in September

September, the first month of the autumn in Jordan, is still a pleasant month, with an average temperature fluctuating between 71.2°F (21.8°C) and 54.9°F (12.7°C).

Temperature

September brings a drop in Jordan's average high-temperature, falling from a moderately hot 82.6°F (28.1°C) in August to an agreeable 71.2°F (21.8°C). In Jordan, the expected average low-temperature for September is a cool 54.9°F (12.7°C).

Humidity

The average relative humidity in September is 44%.

Rainfall

In September, the rain falls for 8.7 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. Throughout the year, there are 104.8 rainfall days, and 13.03" (331mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Jordan, during the entire year, snow falls for 58.4 days and aggregates up to 21.1" (536mm) of snow.

Daylight

In September, the average length of the day is 12h and 32min.
On the first day of September, sunrise is at 6:27 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:48 pm MDT.

Sunshine

In Jordan, the average sunshine in September is 10.1h.

UV index

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Updated: Aug 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

In Jordan, in September, the average high-temperature is 71.2°F (21.8°C), and the average low-temperature is 54.9°F (12.7°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is estimated at 82.4°F (28°C).

What is the average humidity in September?

In September, the average relative humidity is 44%.

How much does it rain in September?

In Jordan, in September, it is raining for 8.7 days, with typically 1.1" (28mm) of accumulated precipitation.

When does it start to snow?

September is the first month it typically snows in Jordan. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

How many hours of daylight does Jordan have in September?

In Jordan, the average day length in September is 12h and 32min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:27 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:48 pm MDT.

How long on average sun shines in September?

In September, the average sunshine duration is 10.1h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Jordan, MT

Average temperature in September - Jordan, MT
  • Average high temperature in September: 71.2°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (27.7°F).

  • Average low temperature in September: 54.9°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).

Average pressure in September
Jordan, MT

Average pressure in September - Jordan, MT
  • Average pressure in September: 29.92"Hg

The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

Average wind speed in September
Jordan, MT

Average wind speed in September - Jordan, MT
  • Average wind speed in September: 10.5mph

The windiest month (with the highest average wind speed) is April (12mph).
The calmest month (with the lowest average wind speed) is February (9.9mph).

Average humidity in September
Jordan, MT

Average humidity in September - Jordan, MT
  • Average humidity in September: 44%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (40%).

Average rainfall in September
Jordan, MT

Average rainfall in September - Jordan, MT
  • Average rainfall in September: 1.1"

The wettest months (with the highest rainfall) are May and June (1.89").
The driest month (with the least rainfall) is November (0.63").

Average rainfall days in September
Jordan, MT

Average rainfall days in September - Jordan, MT
  • Average rainfall days in September: 8.7 days

The month with the highest number of rainy days is May (14.5 days).
The month with the least rainy days is February (3.7 days).

Average snowfall in September
Jordan, MT

Average snowfall in September - Jordan, MT
  • Average snowfall in September: 0.04"

The month with the highest snowfall is December (4.45").
The months with the least snowfall are June, July and August (0").

Average snowfall days in September
Jordan, MT

Average snowfall days in September - Jordan, MT
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is December (12.5 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in September /
Average sunshine in September
Jordan, MT

Average daylight in September / Average sunshine in September - Jordan, MT
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in September: 10h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The months with the least sunshine are January and February (Average sunshine: 4h and 54min).

Average sunshine days in September
Jordan, MT

Average sunshine days in September - Jordan, MT
  • Average sunshine days in September: 18.7 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is April (12.3 days).

Average UV index in September
Jordan, MT

Average UV index in September - Jordan, MT
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in September
Jordan, MT

Average cloud cover in September - Jordan, MT
  • Average cloud cover in September: 23

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 16).

Average visibility in September
Jordan, MT

Average visibility in September - Jordan, MT
  • Average visibility in September: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Jordan, Montana, USA

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