October weather forecast and climate
St. Louis, MO

A beautiful twilight view of the Gateway Arch in St. Louis, Missouri, with a distant view of the city buildings mirrored in the waterfront
A beautiful twilight view of the Gateway Arch in St. Louis, Missouri, with a distant view of the city buildings mirrored in the waterfront

What is the temperature in October in St. Louis?

In St. Louis, Missouri, in October, the average high-temperature is 68.5°F (20.3°C), and the average low-temperature is 48.9°F (9.4°C).

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

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

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

In October, in St. Louis, the rain falls for 8.7 days. Throughout October, 3.3" (84.6mm) of precipitation is accumulated.

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 UV index in October in St. Louis?

The average UV index in October is 4.
Average temperature in October - St. Louis, MO
  • Average high temperature in October: 20.3°C

The warmest month (with the highest average high temperature) is July (31.7°C).
The month with the lowest average high temperature is January (4.4°C).

  • Average low temperature in October: 9.4°C

The month with the highest average low temperature is July (21.7°C).
The coldest month (with the lowest average low temperature) is January (-4.6°C).

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%).

Average rainfall in October - St. Louis, MO
  • Average rainfall in October: 84.6mm

The wettest month (with the highest rainfall) is May (119.9mm).
The driest month (with the lowest rainfall) is February (56.9mm).

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 lowest number of rainy days is September (7.4 days).

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

The month with the highest snowfall is January (142.2mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

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).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in October / Average sunshine in October - St. Louis, MO
  • Average daylight in October: 11.2h

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

  • Average sunshine in October: 6.7h

The month with most sunshine is July (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 4.2h).

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

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

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