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 81.9°F (27.7°C) to a pleasant 70.7°F (21.5°C). During September, Highwood sees a mean low-temperature of 52.2°F (11.2°C).Humidity
The average relative humidity in September is 46%.Rainfall
In September, the rain falls for 9.4 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. Throughout the year, in Highwood, there are 119.1 rainfall days, and 13.43" (341mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Highwood, Montana. Throughout September, in the average 0.4 snowfall days, it receives 0.94" (24mm) of snow. In Highwood, during the entire year, snow falls for 58.3 days and aggregates up to 29.37" (746mm) of snow.Daylight
The average length of the day in September in Highwood is 12h and 33min.On the first day of the month, sunrise is at 6:42 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:03 pm MDT.
Sunshine
In September, the average sunshine in Highwood is 9.9h.UV index
The average daily maximum UV index in September in Highwood is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 4 in September translates into these instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Highwood?
What is the average humidity in September in Highwood?
How much does it rain in Highwood in September?
When does it start snowing in Highwood?
How many hours of daylight does Highwood have in September?
When is the sunrise / sunset in September in Highwood?
How long on average sun shines in September in Highwood?
What is the UV index intensity in September in Highwood?
Average temperature in September
Highwood, MT
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (29.8°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is February (18.1°F).
Average pressure in September
Highwood, MT
- Average pressure in September: 29.94"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
Highwood, MT
- Average wind speed in September: 8.9mph
The windiest months (with the highest average wind speed) are January and November (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity in September
Highwood, MT
- Average humidity in September: 46%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (39%).
Average rainfall in September
Highwood, MT
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in September
Highwood, MT
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Highwood, MT
- Average snowfall in September: 0.94"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Highwood, MT
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is February (12.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Highwood, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Highwood, MT
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in September
Highwood, MT
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Highwood, MT
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in September
Highwood, 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).
Highwood, Montana, USA
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