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
A modest decline in the average high-temperature is seen during September, decreasing from a tropical 87.4°F (30.8°C) in August to a moderately hot 81°F (27.2°C). Dundas anticipates an average minimum temperature of 62.2°F (16.8°C) in the month of September.Heat index
The heat index in September is calculated to be a tropical 86°F (30°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely vital to babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
The average relative humidity in September in Dundas is 75%.Rainfall
September is the month with the least rainfall. Rain falls for 12.8 days and accumulates 1.93" (49mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of September in Dundas, sunrise is at 6:43 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:56 pm EDT.
Sunshine
In Dundas, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September in Dundas is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What is the temperature in September in Dundas?
What is the average humidity in September in Dundas?
What is the driest month in Dundas?
How many days does it rain in September in Dundas?
When it does not snow in Dundas?
Does it snow in Dundas in September?
How many hours of daylight does Dundas have in September?
When is the sunrise / sunset in September in Dundas?
How many hours of sunshine does Dundas have in September?
What is the UV index reading in September in Dundas?
Average temperature in September
Dundas, VA
- Average high temperature in September: 81°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in September: 62.2°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in September
Dundas, VA
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Dundas, VA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Dundas, VA
- Average humidity in September: 75%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (71%).
Average rainfall in September
Dundas, VA
- Average rainfall in September: 1.93"
The wettest months (with the highest rainfall) are March, May and November (2.68").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Dundas, VA
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Dundas, VA
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Dundas, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.5 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
Dundas, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Dundas, VA
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in September
Dundas, VA
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Dundas, VA
- Average cloud cover in September: 40
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Dundas, VA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Dundas, Virginia, USA
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