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's presence records an average high-temperature of a still warm 74.3°F (23.5°C), closely mirroring August's climate. Manlius experiences an average low-temperature of 55.8°F (13.2°C) in the month of September.Humidity
In September, the average relative humidity is 78%.Rainfall
In Manlius, in September, it is raining for 9.1 days, with typically 0.94" (24mm) of accumulated precipitation. Throughout the year, there are 114.5 rainfall days, and 12.72" (323mm) of precipitation is accumulated.Snowfall
In Manlius, snow does not fall in May through September.Daylight
In Manlius, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:25 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:41 pm CDT.
Sunshine
The average sunshine in September in Manlius is 8.9h.UV index
In September, the average daily maximum UV index in Manlius is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The UV index of 4 during September leads to these advisories:
Take precautions - Protection against sun damage is advised. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Frequently asked questions
What are September temperatures in Manlius?
What is the average humidity in September in Manlius?
How many days does it rain in September in Manlius?
When it does not snow in Manlius?
Does it snow in Manlius in September?
What is the average length of the day in September in Manlius?
When are sunrise and sunset in September in Manlius?
How many hours of sunshine does Manlius have in September?
What is the UV index reading in September in Manlius?
Average temperature in September
Manlius, IL
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in September
Manlius, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Manlius, IL
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Manlius, IL
- Average humidity in September: 78%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Manlius, IL
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is May (2.01").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Manlius, IL
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in September
Manlius, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Manlius, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.1 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
Manlius, IL
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Manlius, IL
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is December (20.8 days).
The month with the least sunshine days is June (13.5 days).
Average UV index in September
Manlius, IL
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Manlius, IL
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in September
Manlius, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Manlius, Illinois, USA
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