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
Transition from August to September is accompanied by a temperature drop, with average high-temperatures decreasing from a moderately hot 81.1°F (27.3°C) to a pleasant 72°F (22.2°C). September nights in Boyd show a substantial disparity from the daytime peak with an average low-temperature of 50.2°F (10.1°C).Humidity
In Boyd, the average relative humidity in September is 45%.Rainfall
In Boyd, in September, it is raining for 6.9 days, with typically 0.79" (20mm) of accumulated precipitation. In Boyd, during the entire year, the rain falls for 108.1 days and collects up to 12.83" (326mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.8 snowfall days, it receives 0.67" (17mm) of snow. Throughout the year, in Boyd, there are 61.5 snowfall days, and 41.77" (1061mm) of snow is accumulated.Daylight
In September, the average length of the day in Boyd, Montana, is 12h and 31min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:53 pm. On the last day of September, in Boyd, sunrise is at 7:14 am and sunset at 6:57 pm MDT.
Sunshine
In Boyd, Montana, the average sunshine in September is 10.6h.UV index
In September, the average daily maximum UV index in Boyd is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Boyd?
What is the average humidity in September in Boyd?
How much does it rain in Boyd in September?
When does it start snowing in Boyd?
What is the average length of the day in September in Boyd?
What time are sunrise and sunset in September in Boyd?
How many hours of sunshine does Boyd have in September?
How high is the UV index in September in Boyd?
Average temperature in September
Boyd, MT
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (30.7°F).
- Average low temperature in September: 50.2°F
The months with the highest average low temperature are July and August (57.2°F).
The coldest month (with the lowest average low temperature) is February (16.7°F).
Average pressure in September
Boyd, MT
- Average pressure in September: 29.96"Hg
The months with the highest atmospheric pressure are January and December (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Boyd, MT
- Average wind speed in September: 6.9mph
The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Boyd, MT
- Average humidity in September: 45%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (41%).
Average rainfall in September
Boyd, MT
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Boyd, MT
- Average rainfall days in September: 6.9 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 days).
Average snowfall in September
Boyd, MT
- Average snowfall in September: 0.67"
The month with the highest snowfall is February (6.81").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Boyd, MT
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is February (10.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Boyd, 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 4min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in September
Boyd, MT
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is May (10.5 days).
Average UV index in September
Boyd, MT
- Average UV index in September: 4
The month with the highest UV index is 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
Boyd, MT
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 38).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in September
Boyd, 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).
Boyd, Montana, USA
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