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
Otter's transition into September involves a shift in temperature, receding from 83.7°F (28.7°C) in August to a still warm 74.1°F (23.4°C). In September, Otter experiences an average nighttime temperature of 52.7°F (11.5°C).Humidity
In September, the average relative humidity in Otter, Montana, is 44%.Rainfall
In Otter, in September, during 8.6 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, in Otter, there are 127.6 rainfall days, and 14.25" (362mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Otter. Throughout September, in the average 0.2 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, in Otter, there are 65.3 snowfall days, and 28.82" (732mm) of snow is accumulated.Daylight
In Otter, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:46 pm MDT.
Sunshine
In Otter, the average sunshine in September is 10.8h.UV index
In Otter, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Otter?
What is the average humidity in September in Otter?
How much does it rain in Otter in September?
When does it start snowing in Otter?
How many hours of daylight does Otter have in September?
What time are sunrise and sunset in September in Otter?
How long on average sun shines in September in Otter?
What is the UV index intensity in September in Otter?
Average temperature in September
Otter, MT
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (31.1°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (61.5°F).
The coldest months (with the lowest average low temperature) are January and February (16.2°F).
Average pressure in September
Otter, MT
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Otter, MT
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are July and December (6.8mph).
Average humidity in September
Otter, MT
- Average humidity in September: 44%
The months with the highest relative humidity are January and February (79%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Otter, MT
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in September
Otter, MT
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Otter, MT
- Average snowfall in September: 0.12"
The month with the highest snowfall is February (5.2").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Otter, MT
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Otter, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 10h and 5min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in September
Otter, MT
- Average sunshine days in September: 18.2 days
The month with the most sunshine days is September (18.2 days).
The month with the least sunshine days is May (9.6 days).
Average UV index in September
Otter, MT
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Otter, MT
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 14).
Average visibility in September
Otter, MT
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Otter, Montana, USA
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