September weather forecast and climate
Horn, NE

The first month of the autumn, September, is still a warm month in Horn, Nebraska, with average temperature varying between 56.7°F (13.7°C) and 77.5°F (25.3°C).

Temperature

In September, the average high-temperature drops, from a tropical 86.5°F (30.3°C) in August, to a warm 77.5°F (25.3°C). In September, in Horn, the average low-temperature is 56.7°F (13.7°C).

Humidity

In September, the average relative humidity is 47%.

Rainfall

In Horn, it is raining for 7.3 days, with typically 0.87" (22mm) of accumulated precipitation. In Horn, during the entire year, the rain falls for 111.7 days and collects up to 14.41" (366mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 48.2 snowfall days, and 21.54" (547mm) of snow is accumulated.

Daylight

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

Sunshine

In Horn, the average sunshine is 10.4h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 Horn?

In September, the average high-temperature is 77.5°F (25.3°C), and the average low-temperature is 56.7°F (13.7°C).

What is the average humidity in September in Horn?

In Horn, Nebraska, the average relative humidity in September is 47%.

How many days does it rain in September in Horn?

In Horn, Nebraska, during September, the rain falls for 7.3 days and regularly aggregates up to 0.87" (22mm) of precipitation.

When does it start to snow in Horn?

September is the first month it typically snows in Horn, Nebraska. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

What is the average length of the day in September in Horn?

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

How long on average sun shines in September in Horn?

In Horn, Nebraska, the average sunshine in September is 10.4h.

How high is the UV index in September in Horn?

In Horn, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - Horn, NE
  • Average high temperature in September: 25.3°C

The warmest month (with the highest average high temperature) is July (31.4°C).
Months with the lowest average high temperature are January and December (0.8°C).

  • Average low temperature in September: 13.7°C

The month with the highest average low temperature is July (18.7°C).
The coldest month (with the lowest average low temperature) is January (-6.9°C).

Average pressure in September - Horn, NE
  • Average pressure in September: 1013.8mbar

The month with the highest atmospheric pressure is January (1020.2mbar).
The month with the lowest atmospheric pressure is June (1010.6mbar).

Average wind speed in September - Horn, NE
  • Average wind speed in September: 17km/h

The windiest month (with the highest average wind speed) is April (18.5km/h).
The calmest month (with the lowest average wind speed) is August (15.1km/h).

Average humidity in September - Horn, NE
  • Average humidity in September: 47%

The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (46%).

Average rainfall in September - Horn, NE
  • Average rainfall in September: 22mm

The wettest month (with the highest rainfall) is May (61mm).
The driest month (with the least rainfall) is January (12mm).

Average rainfall days in September - Horn, NE
  • Average rainfall days in September: 7.3 days

The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is December (3.7 days).

Average snowfall in September - Horn, NE
  • Average snowfall in September: 1mm

The month with the highest snowfall is February (108mm).
Months with the least snowfall are June, July and August (0mm).

Average snowfall days in September - Horn, NE
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is February (10.6 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in September / Average sunshine in September - Horn, NE
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 10.4h

The month with the most sunshine is August (Average sunshine: 11.9h).
The month with the least sunshine is February (Average sunshine: 5.7h).

Average sunshine days in September - Horn, NE
  • Average sunshine days in September: 19.8 days

Months with the most sunshine days are September and December (19.8 days).
The month with the least sunshine days is April (11.6 days).

Average UV index in September - Horn, NE
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September - Horn, NE
  • Average cloud cover in September: 18

The month with the most cloud cover is February (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 15).

Average visibility in September - Horn, NE
  • Average visibility in September: 10km

Months with the highest visibility are May, June, July, August, September, October and November (10km).
Months with the lowest visibility are January, February, March, April and December (9km).