September weather forecast
Saint Paul, MO

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Weather in September

September, the first month of the autumn in Saint Paul, 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 79.3°F (26.3°C).

Temperature

The start of September comes with a small reduction in the average high-temperature, subtly receding from 85.5°F (29.7°C) in August to a still moderately hot 79.3°F (26.3°C). During the nights in September, Saint Paul experiences a consistent average temperature of 59.5°F (15.3°C).

Humidity

The average relative humidity in September is 74%.

Rainfall

In Saint Paul, Missouri, during September, the rain falls for 11.9 days and regularly aggregates up to 2.13" (54mm) of precipitation. Throughout the year, there are 152.1 rainfall days, and 32.01" (813mm) of precipitation is accumulated.

Snowfall

In Saint Paul, snow does not fall in May through October.

Daylight

In Saint Paul, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:32 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm CDT.

Sunshine

The average sunshine in September in Saint Paul is 9.6h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: The UV index of 5 during September leads to these advisories:
Be vigilant - Suggestions to stave off sun damage are provided. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

The high-temperature, in September, in Saint Paul, is 79.3°F (26.3°C), while the low-temperature averages to 59.5°F (15.3°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 96.8°F (36°C).

What is the average humidity in September?

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

How much does it rain in September?

In Saint Paul, in September, it is raining for 11.9 days, with typically 2.13" (54mm) of accumulated precipitation.

When it does not snow?

In Saint Paul, snow does not fall in May through October.

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

In September, the average day length is 12h and 26min.

When are sunrise and sunset in September?

On the first day of September in Saint Paul, sunrise is at 6:32 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration is 9.6h.

What is the UV index reading in September?

In Saint Paul, Missouri, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Saint Paul, MO

Average temperature in September - Saint Paul, MO
  • Average high temperature in September: 79.3°F

The warmest month (with the highest average high temperature) is July (87.1°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°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).

Average pressure in September
Saint Paul, MO

Average pressure in September - Saint Paul, MO
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in September
Saint Paul, MO

Average wind speed in September - Saint Paul, MO
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in September
Saint Paul, MO

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

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Saint Paul, MO

Average rainfall in September - Saint Paul, MO
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is April (3.82").
The driest month (with the least rainfall) is February (1.77").

Average rainfall days in September
Saint Paul, MO

Average rainfall days in September - Saint Paul, MO
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in September
Saint Paul, MO

Average snowfall in September - Saint Paul, MO
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.15").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Saint Paul, MO

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

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Saint Paul, MO

Average daylight in September / Average sunshine in September - Saint Paul, MO
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 9h and 4min

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in September
Saint Paul, MO

Average sunshine days in September - Saint Paul, MO
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is June (10.9 days).

Average UV index in September
Saint Paul, MO

Average UV index in September - Saint Paul, MO
  • Average UV index in September: 5

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

Average cloud cover in September
Saint Paul, MO

Average cloud cover in September - Saint Paul, MO
  • Average cloud cover in September: 29

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in September
Saint Paul, MO

Average visibility in September - Saint Paul, MO
  • Average visibility in September: 6mi

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

Saint Paul, Missouri, USA

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