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
With the onset of September, Hecla experiences a modest temperature adjustment, with the average high-temperature gently receding from a moderately hot 81.1°F (27.3°C) in August to a pleasant 72.7°F (22.6°C). In the month of September, an average of 52.3°F (11.3°C) marks the low-temperature in Hecla.Humidity
August and September, with an average relative humidity of 62%, are the least humid months.Rainfall
In Hecla, during September, the rain falls for 9.5 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, in Hecla, there are 109.5 rainfall days, and 20.39" (518mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Hecla.Daylight
In September, the average length of the day in Hecla is 12h and 31min.On the first day of September, sunrise is at 6:54 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:13 pm CDT.
Sunshine
In Hecla, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Exercise caution. Those with pale skin may experience burns in less than half an hour. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What is the average September temperature in Hecla?
What are the least humid months in Hecla?
What is the average humidity in September in Hecla?
How much does it rain in Hecla in September?
When it does not snow in Hecla?
Does it snow in Hecla in September?
How many hours of daylight does Hecla have in September?
What time are sunrise and sunset in September in Hecla?
How many hours of sunshine does Hecla have in September?
What is the UV index reading in September in Hecla?
Average temperature in September
Hecla, SD
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (19°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in September
Hecla, SD
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Hecla, SD
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is October (10.8mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in September
Hecla, SD
- Average humidity in September: 62%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are August and September (62%).
Average rainfall in September
Hecla, SD
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in September
Hecla, SD
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (2.4 days).
Average snowfall in September
Hecla, SD
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Hecla, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hecla, SD
- Average daylight in September: 12h and 3min
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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Hecla, SD
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in September
Hecla, SD
- 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 and November (UV index 1).
Average cloud cover in September
Hecla, SD
- Average cloud cover in September: 26
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Hecla, SD
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
Hecla, South Dakota, USA
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