September weather forecastMarengo, VA
September
Weather in September
The first month of the autumn, September, is still a warm month in Marengo, Virginia, with an average temperature varying between 81.1°F (27.3°C) and 62.8°F (17.1°C).Temperature
September witnesses a gentle descent in average high-temperature, descending from August's hot 87.3°F (30.7°C) to a moderately hot 81.1°F (27.3°C). During September, the temperature in Marengo tends to dip to an average of 62.8°F (17.1°C) at night.Heat index
The average heat index in September is computed to be a hot 86°F (30°C). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.One should consider that heat index numbers are for shaded settings and light wind. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Humidity
In Marengo, the average relative humidity in September is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.9 days and typically collects 1.85" (47mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day in Marengo is 12h and 24min.On the first day of September, sunrise is at 6:44 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 Marengo, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 5 in September leads to these guidelines:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Marengo, VA
- Average high temperature in September: 81.1°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (45.9°F).
- Average low temperature in September: 62.8°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Marengo, 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
Marengo, VA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Marengo, VA
- Average humidity in September: 76%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is July (72%).
Average rainfall in September
Marengo, VA
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Marengo, VA
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in September
Marengo, VA
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.01").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Marengo, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Marengo, VA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Marengo, VA
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is May (11 days).
Average UV index in September
Marengo, 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 and December (UV index 2).
Average cloud cover in September
Marengo, VA
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Marengo, 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).
