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
A shift in Gallatin Gateway's weather is observed as August turns into September, with the average high temperature reducing from a warm 75.6°F (24.2°C) to a comfortable 65.3°F (18.5°C). Gallatin Gateway records a marked daily temperature contrast, with an average low-temperature of 40.5°F (4.7°C) during the nights of September.Humidity
In September, the average relative humidity is 56%.Rainfall
In September, the rain falls for 11.2 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. Throughout the year, there are 131 rainfall days, and 23.15" (588mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows in Gallatin Gateway. Throughout September, in the average 1.5 snowfall days, it receives 2.05" (52mm) of snow. In Gallatin Gateway, during the entire year, snow falls for 122.8 days and aggregates up to 91.1" (2314mm) of snow.Daylight
In Gallatin Gateway, the average length of the day in September is 12h and 31min.On the first day of September in Gallatin Gateway, sunrise is at 6:47 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:06 pm MDT.
Sunshine
In September, the average sunshine is 9.6h.UV index
In September, the average daily maximum UV index in Gallatin Gateway is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 3 in September interprets into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Gallatin Gateway?
What is the average humidity in September in Gallatin Gateway?
How many days does it rain in September in Gallatin Gateway?
When does it start to snow in Gallatin Gateway?
What is the average length of the day in September in Gallatin Gateway?
When are sunrise and sunset in September in Gallatin Gateway?
How long on average sun shines in September in Gallatin Gateway?
What is the UV index reading in September in Gallatin Gateway?
Average temperature in September
Gallatin Gateway, MT
- Average high temperature in September: 65.3°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (24.8°F).
- Average low temperature in September: 40.5°F
The months with the highest average low temperature are July and August (46.9°F).
The coldest month (with the lowest average low temperature) is December (10.4°F).
Average pressure in September
Gallatin Gateway, MT
- Average pressure in September: 29.98"Hg
The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Gallatin Gateway, MT
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is January (6.2mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Gallatin Gateway, MT
- Average humidity in September: 56%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is August (51%).
Average rainfall in September
Gallatin Gateway, MT
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is August (1.3").
Average rainfall days in September
Gallatin Gateway, MT
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in September
Gallatin Gateway, MT
- Average snowfall in September: 2.05"
The month with the highest snowfall is February (15.51").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Gallatin Gateway, MT
- Average snowfall days in September: 1.5 days
The month with the highest number of snowfall days is February (20.3 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Gallatin Gateway, 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: 9h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days in September
Gallatin Gateway, MT
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is April (7 days).
Average UV index in September
Gallatin Gateway, 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
Gallatin Gateway, MT
- Average cloud cover in September: 24
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Gallatin Gateway, MT
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Gallatin Gateway, Montana, USA
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