September weather forecast and climate
Saint Marys, KS

September, the first month of the autumn, in Saint Marys, is also a moderately hot month, with temperature in the range of an average low of 59.5°F (15.3°C) and an average high of 78.8°F (26°C).

Temperature

In Saint Marys, Kansas, the average high-temperature marginally drops, from 85.8°F (29.9°C) in August, to a still moderately hot 78.8°F (26°C). In September, in Saint Marys, the average low-temperature is 59.5°F (15.3°C).

Humidity

In September, the average relative humidity in Saint Marys is 72%.

Rainfall

In September, the rain falls for 11.3 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. Throughout the year, there are 114.1 rainfall days, and 20.67" (525mm) of precipitation is accumulated.

Snowfall

In Saint Marys snow does not fall in May through September.

Daylight

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

Sunshine

In Saint Marys, the average sunshine is 9h.

UV index

The average daily maximum UV index in Saint Marys is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. 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 Saint Marys?

In Saint Marys, in September, the average high-temperature is 78.8°F (26°C), and the average low-temperature is 59.5°F (15.3°C).

What is the average humidity in September in Saint Marys?

In Saint Marys, Kansas, the average relative humidity in September is 72%.

How many days does it rain in September in Saint Marys?

In Saint Marys, Kansas, in September, during 11.3 rainfall days, 1.81" (46mm) of precipitation is typically accumulated.

Does it snow in Saint Marys in September?

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

When it does not snow in Saint Marys?

In Saint Marys, Kansas, snow does not fall in May through September.

How many hours of daylight does Saint Marys have in September?

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

How long on average sun shines in September in Saint Marys?

In Saint Marys, the average sunshine in September is 9h.

How high is the UV index in September in Saint Marys?

In Saint Marys, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.
Average temperature in September - Saint Marys, KS
  • Average high temperature in September: 78.8°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in September: 59.5°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in September - Saint Marys, KS
  • Average pressure in September: 29.99"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.86").

Average wind speed in September - Saint Marys, KS
  • Average wind speed in September: 8.6mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).

Average humidity in September - Saint Marys, KS
  • Average humidity in September: 72%

Months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is October (66%).

Average rainfall in September - Saint Marys, KS
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is May (3.19").
The driest months (with the least rainfall) are January and December (0.55").

Average rainfall days in September - Saint Marys, KS
  • Average rainfall days in September: 11.3 days

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (3.5 days).

Average snowfall in September - Saint Marys, KS
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.77").
Months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September - Saint Marys, KS
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4.9 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 9h

Months with the most sunshine are June and July (Average sunshine: 10.7h).
Months with the least sunshine are January and December (Average sunshine: 5.6).

Average sunshine days in September - Saint Marys, KS
  • Average sunshine days in September: 17.1 days

The month with the most sunshine days is December (23.6 days).
The month with the least sunshine days is May (13.4 days).

Average UV index in September - Saint Marys, 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 - Saint Marys, KS
  • Average cloud cover in September: 27

The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 24).

Average visibility in September - Saint Marys, 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).