September weather forecastMontreal, MO
September
Weather in September
September, the first month of the autumn in Montreal, is still a warm month, with temperature in the range of an average low of 59.7°F (15.4°C) and an average high of 80.2°F (26.8°C).Temperature
September brings a slight decrease in the average high-temperature, shifting from a hot 87.4°F (30.8°C) in August to a moderately hot 80.2°F (26.8°C). September brings Montreal a consistent average low-temperature of 59.7°F (15.4°C).Humidity
July through November, with an average relative humidity of 73%, are the least humid months in Montreal.Rainfall
In Montreal, Missouri, in September, during 9.7 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. Throughout the year, in Montreal, there are 131.8 rainfall days, and 22.09" (561mm) of precipitation is accumulated.Snowfall
In Montreal, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:39 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:54 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
The average daily maximum UV index in September in Montreal is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Ensure safety - Recommendations to avert sunburn are presented. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Montreal, MO
- Average high temperature in September: 80.2°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in September: 59.7°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in September
Montreal, MO
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Montreal, MO
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in September
Montreal, MO
- Average humidity in September: 73%
The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are July, August, September, October and November (73%).
Average rainfall in September
Montreal, MO
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in September
Montreal, MO
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.2 days).
Average snowfall in September
Montreal, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Montreal, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.2 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, MO
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in September
Montreal, MO
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is May (13.4 days).
Average UV index in September
Montreal, 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
Montreal, MO
- Average cloud cover in September: 30
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Montreal, MO
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
