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 beginning of September involves a decrease in the average high-temperature, transitioning from a pleasant 72°F (22.2°C) in August to an enjoyable 61°F (16.1°C). Despite high daytime temperatures, the average temperature lowers to an icy 37.8°F (3.2°C) during September nights.Humidity
The average relative humidity in September is 64%.Rainfall
In Nyack, Montana, in September, it is raining for 8.8 days, with typically 0.87" (22mm) of accumulated precipitation. In Nyack, during the entire year, the rain falls for 118.6 days and collects up to 20.75" (527mm) of precipitation.Snowfall
January through June, September through December are months with snowfall in Nyack. September is the first month it typically snows in Nyack, Montana. Throughout September, in the average 1.2 snowfall days, it receives 1.02" (26mm) of snow. Throughout the year, in Nyack, there are 128.7 snowfall days, and 92.13" (2340mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 34min.On the first day of the month, sunrise is at 6:53 am and sunset at 8:16 pm. On the last day of September, sunrise is at 7:34 am and sunset at 7:15 pm MDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 3 during September translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What is the average September temperature in Nyack?
What is the average humidity in September in Nyack?
How much does it rain in Nyack in September?
When does it start snowing in Nyack?
How many hours of daylight does Nyack have in September?
What time are sunrise and sunset in September in Nyack?
How long on average sun shines in September in Nyack?
How high is the UV index in September in Nyack?
Average temperature in September
Nyack, MT
- Average high temperature in September: 61°F
The warmest month (with the highest average high temperature) is July (73°F).
The month with the lowest average high temperature is December (23.2°F).
- Average low temperature in September: 37.8°F
The months with the highest average low temperature are July and August (44.2°F).
The coldest month (with the lowest average low temperature) is February (10.9°F).
Average pressure in September
Nyack, MT
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Nyack, MT
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is November (7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Nyack, MT
- Average humidity in September: 64%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Nyack, MT
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is January (2.56").
The driest month (with the least rainfall) is August (0.71").
Average rainfall days in September
Nyack, MT
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Nyack, MT
- Average snowfall in September: 1.02"
The month with the highest snowfall is January (20.16").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Nyack, MT
- Average snowfall days in September: 1.2 days
The month with the highest number of snowfall days is December (22.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Nyack, MT
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Nyack, MT
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is August (19.6 days).
The month with the least sunshine days is February (7.2 days).
Average UV index in September
Nyack, 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, November and December (UV index 1).
Average cloud cover in September
Nyack, MT
- Average cloud cover in September: 27
The month with the most cloud cover is January (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility in September
Nyack, MT
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Nyack, Montana, USA
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