Saint Paul
Minnesota, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Saint Paul, MN

A sunrise shot of the Saint Paul
A sunrise shot of the Saint Paul's Cathedral church ground in Saint Paul, Minnesota
September, the first month of the autumn, in Saint Paul, is also an agreeable month, with average temperature varying between 53.2°F (11.8°C) and 71.2°F (21.8°C).

Temperature

In September, the average high-temperature marginally drops, from a warm 78.8°F (26°C) in August, to a pleasant 71.2°F (21.8°C). In September, the average low-temperature is 53.2°F (11.8°C).

Humidity

The average relative humidity in Saint Paul is 74%.

Rainfall

In Saint Paul, in September, it is raining for 11.1 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, in Saint Paul, there are 116.5 rainfall days, and 21.81" (554mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September is 12.5h.

Sunshine

In Saint Paul, the average sunshine is 8.6h.

UV index

In September, the average daily maximum UV index in Saint Paul is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Saint Paul?

In September, the average high-temperature is 71.2°F (21.8°C), and the average low-temperature is 53.2°F (11.8°C).

What is the average humidity in September in Saint Paul?

In Saint Paul, the average relative humidity in September is 74%.

How much does it rain in Saint Paul in September?

In Saint Paul, Minnesota, in September, it is raining for 11.1 days, with typically 1.89" (48mm) of accumulated precipitation.

Does it snow in Saint Paul in September?

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

When it does not snow in Saint Paul?

June through September are months without snowfall in Saint Paul, Minnesota.

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

In Saint Paul, Minnesota, the average length of the day in September is 12.5h.

How many hours of sunshine does Saint Paul have in September?

The average sunshine in September is 8.6h.

What is the UV index intensity in September in Saint Paul?

In Saint Paul, Minnesota, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Saint Paul, MN
  • Average high temperature in September: 21.8°C

The warmest month (with the highest average high temperature) is July (27.3°C).
The month with the lowest average high temperature is January (-6.7°C).

  • Average low temperature in September: 11.8°C

The month with the highest average low temperature is July (17.3°C).
The coldest month (with the lowest average low temperature) is January (-13.7°C).

Average humidity in September - Saint Paul, MN
  • Average humidity in September: 74%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (71%).

Average rainfall in September - Saint Paul, MN
  • Average rainfall in September: 48mm

The wettest month (with the highest rainfall) is June (97mm).
The driest month (with the lowest rainfall) is January (15mm).

Average rainfall days in September - Saint Paul, MN
  • Average rainfall days in September: 11.1 days

The month with the highest number of rainy days is June (16.3 days).
The month with the lowest number of rainy days is February (2 days).

Average snowfall in September - Saint Paul, MN
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (119mm).
Months with the lowest snowfall are June, July, August and September (0mm).

Average snowfall days in September - Saint Paul, MN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (13.8 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Saint Paul, MN
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

  • Average sunshine in September: 8.6h

The month with most sunshine is July (Average sunshine: 9.9h).
The month with least sunshine is January (Average sunshine: 3h).

Average UV index in September - Saint Paul, MN
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 1).