September weather forecast and climate
Princeton, KS

September, the first month of the autumn, in Princeton, is still a warm month, with temperature in the range of an average high of 78.8°F (26°C) and an average low of 60.1°F (15.6°C).

Temperature

In Princeton, Kansas, the average high-temperature slightly decreases, from 85.3°F (29.6°C) in August, to a still moderately hot 78.8°F (26°C). In Princeton, Kansas, in September, the average low-temperature is 60.1°F (15.6°C).

Humidity

The average relative humidity in Princeton is 75%.

Rainfall

In Princeton, it is raining for 11.5 days, with typically 2.01" (51mm) of accumulated precipitation. In Princeton, during the entire year, the rain falls for 126.9 days and collects up to 23.5" (597mm) of precipitation.

Snowfall

In Princeton snow does not fall in May through September.

Daylight

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

Sunshine

The average sunshine in Princeton is 9.2h.

UV index

In September, the average daily maximum UV index in Princeton is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the temperature in September in Princeton?

In September, in Princeton, Kansas, the average high-temperature is 78.8°F (26°C), and the average low-temperature is 60.1°F (15.6°C).

What is the average humidity in September in Princeton?

In Princeton, the average relative humidity in September is 75%.

How many days does it rain in September in Princeton?

In September, in Princeton, Kansas, the rain falls for 11.5 days. Throughout September, 2.01" (51mm) of precipitation is accumulated.

Does it snow in Princeton in September?

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

When it does not snow in Princeton?

In Princeton snow does not fall in May through September.

How many hours of daylight does Princeton have in September?

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

How long on average sun shines in September in Princeton?

In Princeton, the average sunshine in September is 9.2h.

What is the UV index intensity in September in Princeton?

The average daily maximum UV index in September in Princeton is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Princeton, KS
  • Average high temperature in September: 78.8°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 60.1°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

Average pressure in September - Princeton, KS
  • Average pressure in September: 30"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.88").

Average wind speed in September - Princeton, KS
  • Average wind speed in September: 7.8mph

The windiest months (with the highest average wind speed) are March and April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

Average humidity in September - Princeton, KS
  • Average humidity in September: 75%

The month with the highest relative humidity is May (79%).
Months with the lowest relative humidity are October and November (69%).

Average rainfall in September - Princeton, KS
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is January (0.71").

Average rainfall days in September - Princeton, KS
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is December (4.5 days).

Average snowfall in September - Princeton, KS
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.28").
Months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September - Princeton, KS
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4.4 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Princeton, KS
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 9.2h

The month with the most sunshine is June (Average sunshine: 10.7h).
The month with the least sunshine is January (Average sunshine: 5.4h).

Average sunshine days in September - Princeton, KS
  • Average sunshine days in September: 15.8 days

Months with the most sunshine days are January and December (22.6 days).
The month with the least sunshine days is May (12.7 days).

Average UV index in September - Princeton, KS
  • Average UV index in September: 5

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

Average cloud cover in September - Princeton, KS
  • Average cloud cover in September: 28

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

Average visibility in September - Princeton, KS
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).