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
September is characterized by a mild reduction in the average high-temperature, from a hot 86.7°F (30.4°C) in August to a moderately hot 79.9°F (26.6°C). September brings an average low-temperature of 58.8°F (14.9°C) to Iron Mountain Lake.Humidity
The average relative humidity in September is 75%.Rainfall
September is the month with the least rainfall. Rain falls for 13.5 days and accumulates 1.77" (45mm) of precipitation.Snowfall
In Iron Mountain Lake, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:31 pm. On the last day of September, in Iron Mountain Lake, sunrise is at 6:57 am and sunset at 6:46 pm CDT.
Sunshine
In Iron Mountain Lake, the average sunshine in September is 9.4h.UV index
In Iron Mountain Lake, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 5 in September interprets into the following advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Iron Mountain Lake have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Iron Mountain Lake have in September?
What is the UV index reading in September in Iron Mountain Lake?
Average temperature in September
Iron Mountain Lake, MO
- Average high temperature in September: 79.9°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in September
Iron Mountain Lake, 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 (29.93"Hg).
Average wind speed in September
Iron Mountain Lake, MO
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Iron Mountain Lake, MO
- Average humidity in September: 75%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Iron Mountain Lake, MO
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Iron Mountain Lake, MO
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is December (7.9 days).
Average snowfall in September
Iron Mountain Lake, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Iron Mountain Lake, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.5 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
Iron Mountain Lake, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).
Average sunshine days in September
Iron Mountain Lake, MO
- Average sunshine days in September: 14.5 days
The months with the most sunshine days are November and December (18.9 days).
The month with the least sunshine days is July (10.9 days).
Average UV index in September
Iron Mountain Lake, 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
Iron Mountain Lake, MO
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Iron Mountain Lake, MO
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are May, July, August and September (5mi).
Iron Mountain Lake, Missouri, USA
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