September weather forecast and climate
Cortland, NE

September, the first month of the autumn, in Cortland, is still a warm month, with average temperature varying between 57.7°F (14.3°C) and 77.9°F (25.5°C).

Temperature

In September, the average high-temperature slightly decreases, from 84.6°F (29.2°C) in August, to a still moderately hot 77.9°F (25.5°C). The average low-temperature, in September, is 57.7°F (14.3°C).

Humidity

In September, the average relative humidity in Cortland, Nebraska, is 69%.

Rainfall

In September, the rain falls for 12.2 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. Throughout the year, there are 115.2 rainfall days, and 22.56" (573mm) of precipitation is accumulated.

Snowfall

In Cortland, Nebraska, snow does not fall in June through September.

Daylight

The average length of the day in Cortland is 12.4h.

Sunshine

The average sunshine in Cortland is 8.7h.

UV index

In Cortland, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
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. 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.

What is the temperature in September in Cortland?

In Cortland, Nebraska, in September, the average high-temperature is 77.9°F (25.5°C), and the average low-temperature is 57.7°F (14.3°C).

What is the average humidity in September in Cortland?

The average relative humidity in September in Cortland, Nebraska, is 69%.

How much does it rain in Cortland in September?

In September, the rain falls for 12.2 days. Throughout September, 1.81" (46mm) of precipitation is accumulated.

Does it snow in Cortland in September?

In Cortland, Nebraska, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Cortland?

June through September are months without snowfall in Cortland.

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

In September, the average length of the day in Cortland is 12.4h.

How long on average sun shines in September in Cortland?

The average sunshine in September in Cortland, Nebraska, is 8.7h.

How high is the UV index in September in Cortland?

In September, the average daily maximum UV index in Cortland, Nebraska, is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Cortland, NE
  • Average high temperature in September: 25.5°C

The warmest month (with the highest average high temperature) is July (30.4°C).
The month with the lowest average high temperature is January (0.7°C).

  • Average low temperature in September: 14.3°C

The month with the highest average low temperature is July (19.6°C).
The coldest month (with the lowest average low temperature) is January (-7.3°C).

Average pressure in September - Cortland, NE
  • Average pressure in September: 1015.4mbar

The month with the highest atmospheric pressure is January (1021.5mbar).
The month with the lowest atmospheric pressure is June (1011mbar).

Average wind speed in September - Cortland, NE
  • Average wind speed in September: 14.7km/h

The windiest month (with the highest average wind speed) is April (18.3km/h).
The calmest month (with the lowest average wind speed) is July (12.6km/h).

Average humidity in September - Cortland, NE
  • Average humidity in September: 69%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is October (64%).

Average rainfall in September - Cortland, NE
  • Average rainfall in September: 46mm

The wettest month (with the highest rainfall) is May (93mm).
The driest month (with the least rainfall) is February (17mm).

Average rainfall days in September - Cortland, NE
  • Average rainfall days in September: 12.2 days

The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (2.8 days).

Average snowfall in September - Cortland, NE
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (72mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September - Cortland, NE
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (5.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Cortland, NE
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is January (Average sunshine: 5.1h).

Average sunshine days in September - Cortland, NE
  • Average sunshine days in September: 16.2 days

The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is May (12.3 days).

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

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September - Cortland, NE
  • Average cloud cover in September: 28

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 25).

Average visibility in September - Cortland, NE
  • Average visibility in September: 9km

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