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
As August shifts into September, a slight alteration in temperatures is observed, with average highs reducing from a warm 77.5°F (25.3°C) to an agreeable 68°F (20°C). During September, Florence's temperature records a considerable difference from its daily highs to an average low of 42.1°F (5.6°C).Humidity
In September, the average relative humidity in Florence is 56%.Rainfall
In Florence, Montana, during September, the rain falls for 7 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, in Florence, there are 140.1 rainfall days, and 15.16" (385mm) of precipitation is accumulated.Snowfall
Months with snowfall in Florence are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, in Florence, there are 87.7 snowfall days, and 46.5" (1181mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:57 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:17 pm MDT.
Sunshine
In Florence, Montana, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index in Florence is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, a daily UV index of 3 turns into the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Florence?
What is the average humidity in September in Florence?
How much does it rain in Florence in September?
When does it start snowing in Florence?
What is the average length of the day in September in Florence?
When is the sunrise / sunset in September in Florence?
How long on average sun shines in September in Florence?
What is the UV index reading in September in Florence?
Average temperature in September
Florence, MT
- Average high temperature in September: 68°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in September: 42.1°F
The month with the highest average low temperature is August (48.7°F).
The coldest month (with the lowest average low temperature) is December (16°F).
Average pressure in September
Florence, MT
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Florence, MT
- Average wind speed in September: 4.6mph
The windiest month (with the highest average wind speed) is January (5.4mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Florence, MT
- Average humidity in September: 56%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (49%).
Average rainfall in September
Florence, MT
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is February (1.93").
The driest months (with the least rainfall) are July and August (0.43").
Average rainfall days in September
Florence, MT
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is August (5.3 days).
Average snowfall in September
Florence, MT
- Average snowfall in September: 0.2"
The month with the highest snowfall is February (11.22").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Florence, MT
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (17.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Florence, 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 36min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Florence, MT
- Average sunshine days in September: 21.5 days
The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is February (6.9 days).
Average UV index in September
Florence, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Florence, MT
- Average cloud cover in September: 21
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in September
Florence, 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 and December (4mi).
Florence, Montana, USA
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