October weather forecast
St. Louis, MO

A beautiful twilight over the Gateway Arch in St. Louis, Missouri
A beautiful twilight over the Gateway Arch in St. Louis, Missouri

Weather in October

October, the same as September, in St. Louis is another pleasant autumn month, with an average temperature fluctuating between 48.9°F (9.4°C) and 68.5°F (20.3°C).

Temperature

In St. Louis, the average high-temperature in October decreases from a moderately hot 80.2°F (26.8°C) in September to a pleasant 68.5°F (20.3°C). The average low-temperature, in St. Louis, is 48.9°F (9.4°C).

Humidity

In St. Louis, the average relative humidity in October is 68.7%.

Rainfall

In St. Louis, during October, the rain falls for 8.7 days and regularly aggregates up to 3.33" (84.6mm) of precipitation. In St. Louis, during the entire year, the rain falls for 112.6 days and collects up to 40.96" (1040.3mm) of precipitation.

Snowfall

In St. Louis, snow does not fall in May through October.

Daylight

The average length of the day in October in St. Louis is 11h and 11min.
On the first day of October in St. Louis, sunrise is at 6:56 am and sunset at 6:43 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 6:02 pm CDT.

Sunshine

In October, the average sunshine in St. Louis is 6.7h.

UV index

In October, the average daily maximum UV index in St. Louis is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 4 in October interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the average humidity in October in St. Louis?

In October, the average relative humidity in St. Louis, Missouri, is 68.7%.

How many days does it rain in October in St. Louis?

In St. Louis, Missouri, during October, the rain falls for 8.7 days and regularly aggregates up to 3.33" (84.6mm) of precipitation.

When it does not snow in St. Louis?

In St. Louis, Missouri, snow does not fall in May through October.

Does it snow in St. Louis in October?

In St. Louis, Missouri, in October, it doesn't snow. In November, it regularly snows.

What is the average length of the day in October in St. Louis?

The average day length in October in St. Louis is 11h and 11min.

What time are sunrise and sunset in October in St. Louis?

On the first day of October in St. Louis, Missouri, sunrise is at 6:56 am and sunset at 6:43 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 6:02 pm CDT.

How long on average sun shines in October in St. Louis?

The average sunshine duration in October in St. Louis is 6.7h.

How high is the UV index in October in St. Louis?

In October, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average UV index

Average temperature in October
St. Louis, MO

Average temperature in October - St. Louis, MO
  • Average high temperature in October: 68.5°F

The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (39.9°F).

  • Average low temperature in October: 49°F

The month with the highest average low temperature is July (71°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

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Average humidity in October
St. Louis, MO

Average humidity in October - St. Louis, MO
  • Average humidity in October: 68.7%

The month with the highest relative humidity is December (75.8%).
The month with the lowest relative humidity is April (63.5%).

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Average rainfall in October
St. Louis, MO

Average rainfall in October - St. Louis, MO
  • Average rainfall in October: 3.3"

The wettest month (with the highest rainfall) is May (4.7").
The driest month (with the least rainfall) is February (2.2").

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Average rainfall days in October
St. Louis, MO

Average rainfall days in October - St. Louis, MO
  • Average rainfall days in October: 8.7 days

The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is September (7.4 days).

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Average snowfall in October
St. Louis, MO

Average snowfall in October - St. Louis, MO
  • Average snowfall in October: 0"

The month with the highest snowfall is January (5.6").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in October
St. Louis, MO

Average snowfall days in October - St. Louis, MO
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in October /
Average sunshine in October
St. Louis, MO

Average daylight in October / Average sunshine in October - St. Louis, MO
  • Average daylight in October: 11h and 11min

The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 31min).

  • Average sunshine in October: 6h and 42min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).

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Average UV index in October
St. Louis, MO

Average UV index in October - St. Louis, MO
  • Average UV index in October: 4

The months with the highest UV index are June, July and August (UV index 9).
The months with the lowest UV index are January and December (UV index 2).

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