Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September indicates a decrease in the average high-temperature, moving from a moderately hot 75.7°F (24.3°C) in August to a refreshing 65.5°F (18.6°C). A steep decline to a chilly 43.7°F (6.5°C) characterizes the September nights.Humidity
In September, the average relative humidity is 53%.Rainfall
In Martinsdale, Montana, in September, it is raining for 5 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, in Martinsdale, there are 80 rainfall days, and 8.78" (223mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.6 snowfall days, it receives 1.02" (26mm) of snow. Throughout the year, in Martinsdale, there are 56.9 snowfall days, and 25.55" (649mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September in Martinsdale, sunrise is at 6:42 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:02 pm MDT.
Sunshine
The average sunshine in September in Martinsdale is 10.4h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are September temperatures in Martinsdale?
What is the average humidity in September in Martinsdale?
How many days does it rain in September in Martinsdale?
When does it start snowing in Martinsdale?
What is the average length of the day in September in Martinsdale?
When is the sunrise / sunset in September in Martinsdale?
How long on average sun shines in September in Martinsdale?
How high is the UV index in September in Martinsdale?
Average temperature in September
Martinsdale, MT
- Average high temperature in September: 65.5°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.6°F).
- Average low temperature in September: 43.7°F
The month with the highest average low temperature is August (50.2°F).
The coldest month (with the lowest average low temperature) is February (14°F).
Average pressure in September
Martinsdale, MT
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Martinsdale, MT
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Martinsdale, MT
- Average humidity in September: 53%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Martinsdale, MT
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.24").
Average rainfall days in September
Martinsdale, MT
- Average rainfall days in September: 5 days
The month with the highest number of rainy days is May (12 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in September
Martinsdale, MT
- Average snowfall in September: 1.02"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Martinsdale, MT
- Average snowfall days in September: 0.6 days
The month with the highest number of snowfall days is February (12.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Martinsdale, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in September
Martinsdale, MT
- Average sunshine days in September: 23.8 days
The months with the most sunshine days are August and September (23.8 days).
The month with the least sunshine days is February (14.8 days).
Average UV index in September
Martinsdale, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Martinsdale, MT
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in September
Martinsdale, MT
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Martinsdale, Montana, USA
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