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 shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a warm 78.8°F (26°C) to a pleasant 71.4°F (21.9°C). Nighttime temperature dips to a mean of 53.2°F (11.8°C) during September.Humidity
The average relative humidity in September is 74%.Rainfall
In September, the rain falls for 11.7 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. In Mendota Heights, during the entire year, the rain falls for 119.7 days and collects up to 21.77" (553mm) of precipitation.Snowfall
In Mendota Heights, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:10 am and sunset at 6:54 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 suggests this advice:
Act with care - The suggestion to avoid sunburn is emphasized. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Mendota Heights, MN
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (20.5°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (7.5°F).
Average pressure in September
Mendota Heights, MN
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Mendota Heights, MN
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in September
Mendota Heights, MN
- Average humidity in September: 74%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (71%).
Average rainfall in September
Mendota Heights, MN
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in September
Mendota Heights, MN
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (1.8 days).
Average snowfall in September
Mendota Heights, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mendota Heights, MN
- 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
Mendota Heights, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Mendota Heights, MN
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in September
Mendota Heights, MN
- 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, February, November and December (UV index 1).
Average cloud cover in September
Mendota Heights, MN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in September
Mendota Heights, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Mendota Heights, Minnesota, USA
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