Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Clay's September weather shows a modest shift in high-temperatures, falling from August's moderately hot 82.2°F (27.9°C) to a still warm 76.6°F (24.8°C). An average temperature of 57.4°F (14.1°C) marks the nights in Clay in September.Humidity
In Clay, the average relative humidity in September is 76%.Rainfall
In September, the rain falls for 11.5 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. In Clay, Missouri, during the entire year, the rain falls for 136.5 days and collects up to 26.69" (678mm) of precipitation.Snowfall
In Clay, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:41 pm. On the last day of September, in Clay, sunrise is at 7:05 am and sunset at 6:53 pm CDT.
Sunshine
In Clay, the average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, an average UV index of 5 transforms into the following instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Clay in September?
What is the average humidity in September in Clay?
How much does it rain in Clay in September?
When it does not snow in Clay?
Does it snow in Clay in September?
What is the average length of the day in September in Clay?
When are sunrise and sunset in September in Clay?
How many hours of sunshine does Clay have in September?
How high is the UV index in September in Clay?
Average temperature in September
Clay, MO
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Clay, 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 (29.9"Hg).
Average wind speed in September
Clay, MO
- Average wind speed in September: 7.6mph
The windiest months (with the highest average wind speed) are January and February (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
Clay, MO
- Average humidity in September: 76%
The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Clay, MO
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in September
Clay, MO
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in September
Clay, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Clay, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.9 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
Clay, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Clay, MO
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is December (20 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in September
Clay, MO
- Average UV index in September: 5
The months with the highest UV index are 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
Clay, MO
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Clay, 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).
Clay, Missouri, USA
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