September weather forecastHathaway, MT
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Hathaway, Montana, with temperature in the range of an average high of 74.3°F (23.5°C) and an average low of 56.3°F (13.5°C).Temperature
The shift from August to September corresponds with a decrease in the average high-temperature, down to a still moderately hot 74.3°F (23.5°C) from a warm 84.7°F (29.3°C). An average low-temperature of 56.3°F (13.5°C) is noted during the month of September.Humidity
In September, the average relative humidity in Hathaway is 43%.Rainfall
In September, the rain falls for 7.7 days. Throughout September, 1.06" (27mm) of precipitation is accumulated. In Hathaway, during the entire year, the rain falls for 101.7 days and collects up to 11.85" (301mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Hathaway, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:45 pm MDT.
Sunshine
In September, the average sunshine is 10.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hathaway, MT
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in September
Hathaway, MT
- Average pressure in September: 29.92"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Hathaway, MT
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is February (9.3mph).
Average humidity in September
Hathaway, MT
- Average humidity in September: 43%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (39%).
Average rainfall in September
Hathaway, MT
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is May (1.93").
The driest months (with the least rainfall) are November and December (0.55").
Average rainfall days in September
Hathaway, MT
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is December (4 days).
Average snowfall in September
Hathaway, MT
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.7").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Hathaway, MT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Hathaway, MT
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 10h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Hathaway, MT
- Average sunshine days in September: 20.2 days
The month with the most sunshine days is September (20.2 days).
The month with the least sunshine days is May (14.3 days).
Average UV index in September
Hathaway, MT
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Hathaway, MT
- Average cloud cover in September: 21
The months with the most cloud cover are February and December (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in September
Hathaway, 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).
