September weather forecastMontreal, WI
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Montreal, Wisconsin, with an average temperature fluctuating between 66.7°F (19.3°C) and 49.8°F (9.9°C).Temperature
A mild drop in Montreal's average high-temperature is observed in September, transitioning from a moderately hot 74.3°F (23.5°C) in August to a comfortable 66.7°F (19.3°C). Montreal's average low-temperature in the month of September is recorded at a chilly 49.8°F (9.9°C).Humidity
In Montreal, Wisconsin, the average relative humidity in September is 79%.Rainfall
In Montreal, in September, it is raining for 12.8 days, with typically 1.42" (36mm) of accumulated precipitation. In Montreal, during the entire year, the rain falls for 104.6 days and collects up to 16.5" (419mm) of precipitation.Snowfall
In Montreal, snow does not fall in June through September.Daylight
In Montreal, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:22 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:42 pm CDT.
Sunshine
The average sunshine in September is 8.3h.UV index
In Montreal, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 4 during September translates into the following guidance:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Montreal, WI
- Average high temperature in September: 66.7°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (19.2°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in September
Montreal, WI
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Montreal, WI
- Average wind speed in September: 8.1mph
The windiest months (with the highest average wind speed) are January and November (9.6mph).
The calmest months (with the lowest average wind speed) are June, July and August (7mph).
Average humidity in September
Montreal, WI
- Average humidity in September: 79%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
Montreal, WI
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is May (1.89").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in September
Montreal, WI
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is June (13.1 days).
The month with the least rainy days is January (1.8 days).
Average snowfall in September
Montreal, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (8.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Montreal, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (23.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Montreal, WI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).
Average sunshine days in September
Montreal, WI
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is July (16.3 days).
The month with the least sunshine days is January (7.8 days).
Average UV index in September
Montreal, WI
- 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, November and December (UV index 1).
Average cloud cover in September
Montreal, WI
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 82).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Montreal, WI
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (4mi).
