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
The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's warm 77.5°F (25.3°C) to an agreeable 71.2°F (21.8°C). Monticello experiences a consistent average temperature of 52.3°F (11.3°C) throughout the nights in September.Humidity
In September, the average relative humidity is 81%.Rainfall
In Monticello, during September, the rain falls for 9.9 days and regularly aggregates up to 1.34" (34mm) of precipitation. In Monticello, during the entire year, the rain falls for 124.7 days and collects up to 15.16" (385mm) of precipitation.Snowfall
In Monticello, snow does not fall in June through September.Daylight
In Monticello, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:23 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:40 pm CDT.
Sunshine
In Monticello, the average sunshine in September is 8.7h.UV index
In Monticello, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. To guard against the harmful effects of the Sun, minimize exposure during midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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?
How many days does it rain in September in Monticello?
When it does not snow?
Does it snow in September?
How many hours of daylight does Monticello have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Monticello, WI
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (24.4°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in September
Monticello, WI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Monticello, WI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Monticello, WI
- Average humidity in September: 81%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Monticello, WI
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Monticello, WI
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in September
Monticello, WI
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Monticello, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Monticello, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Monticello, WI
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in September
Monticello, WI
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Monticello, WI
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in September
Monticello, WI
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).
Monticello, Wisconsin, USA
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