Lead
South Dakota, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Lead, SD

September, the first month of the autumn, in Lead, is still a pleasant month, with average temperature ranging between max 68°F (20°C) and min 45°F (7.2°C).

Temperature

In Lead, South Dakota, the average high-temperature drops, from a warm 78.1°F (25.6°C) in August, to a pleasant 68°F (20°C). In September, the average low-temperature is 45°F (7.2°C).

Rainfall

In Lead, during September, the rain falls for 8 days and regularly aggregates up to 2" (50.5mm) of precipitation. In Lead, during the entire year, the rain falls for 105 days and collects up to 30.6" (776mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, Lead receives 1.8" (45.7mm) of snow. In Lead, during the entire year, snow aggregates up to 144.9" (3680.4mm).

Daylight

In Lead, the average length of the day in September is 12.5h.

Sunshine

In Lead, the average sunshine is 8h.

UV index

The average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in September in Lead?

In September, the average high-temperature is 68°F (20°C), and the average low-temperature is 45°F (7.2°C).

How much does it rain in Lead in September?

In September, the rain falls for 8 days. Throughout September, 2" (50.5mm) of precipitation is accumulated.

When does it start snowing in Lead?

September is the first month it typically snows in Lead, South Dakota. Throughout September, Lead receives 1.8" (45.7mm) of snow.

How many hours of daylight does Lead have in September?

The average length of the day in September in Lead, South Dakota, is 12.5h.

How long on average sun shines in September in Lead?

In Lead, South Dakota, the average sunshine in September is 8h.

What is the UV index intensity in September in Lead?

In Lead, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.
Average temperature in September - Lead, SD
  • Average high temperature in September: 20°C

The warmest month (with the highest average high temperature) is July (26.1°C).
The month with the lowest average high temperature is December (1.7°C).

  • Average low temperature in September: 7.2°C

The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is December (-8.9°C).

Average rainfall in September - Lead, SD
  • Average rainfall in September: 50.5mm

The wettest month (with the highest rainfall) is May (117.9mm).
The driest month (with the lowest rainfall) is January (34mm).

Average rainfall days in September - Lead, SD
  • Average rainfall days in September: 8 days

Months with the highest number of rainy days are May and June (12 days).
Months with the lowest number of rainy days are October and November (6 days).

Average snowfall in September - Lead, SD
  • Average snowfall in September: 45.7mm

The month with the highest snowfall is March (650.2mm).
Months with the lowest snowfall are July and August (0mm).

Average daylight in September / Average sunshine in September - Lead, SD
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).

  • Average sunshine in September: 8h

The month with most sunshine is July (Average sunshine: 11h).
Months with least sunshine are January, November and December (Average sunshine: 5).

Average UV index in September - Lead, SD
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).