September weather forecast
Merchant, VA

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Weather in September

The first month of the autumn, September, is still a warm month in Merchant, Virginia, with an average temperature fluctuating between 81.1°F (27.3°C) and 62.8°F (17.1°C).

Temperature

The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a tropical 87.3°F (30.7°C) in August to a warm 81.1°F (27.3°C). Throughout the month of September, Merchant witnesses an average low-temperature of 62.8°F (17.1°C).

Heat index

In September, the heat index is estimated at a tropical 86°F (30°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.
Consider that heat index readings are for situations in the shade and light wind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Merchant, 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

In Merchant, snow does not fall in May through October.

Daylight

The average length of the day in September in Merchant, Virginia, is 12h and 24min.
On the first day of the month, sunrise is at 6:43 am and sunset at 7:39 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:56 pm EDT.

Sunshine

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 threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 5 during September leads to these instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Merchant in September?

The high-temperature, in September, in Merchant, records 81.1°F (27.3°C), while the low-temperature is 62.8°F (17.1°C). The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 86°F (30°C).

What is the average humidity in September?

In September, the average relative humidity in Merchant is 76%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 12.9 days and accumulates 1.85" (47mm) of precipitation.

How many days does it rain in September?

In Merchant, during September, the rain falls for 12.9 days and regularly aggregates up to 1.85" (47mm) of precipitation.

When it does not snow?

In Merchant, Virginia, snow does not fall in May through October.

What is the average length of the day in September?

In September, the average day length is 12h and 24min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:43 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:56 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.7h.

What is the UV index reading in September?

In September, the average daily maximum UV index in Merchant is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Merchant, VA

Average temperature in September - Merchant, 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
Merchant, VA

Average pressure in September - Merchant, 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
Merchant, VA

Average wind speed in September - Merchant, 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
Merchant, VA

Average humidity in September - Merchant, 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
Merchant, VA

Average rainfall in September - Merchant, 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
Merchant, VA

Average rainfall days in September - Merchant, 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
Merchant, VA

Average snowfall in September - Merchant, 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
Merchant, VA

Average snowfall days in September - Merchant, 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
Merchant, VA

Average daylight in September / Average sunshine in September - Merchant, VA
  • Average daylight in September: 12h and 2min

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 4min

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
Merchant, VA

Average sunshine days in September - Merchant, 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
Merchant, VA

Average UV index in September - Merchant, 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
Merchant, VA

Average cloud cover in September - Merchant, 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
Merchant, VA

Average visibility in September - Merchant, 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).

Merchant, Virginia, USA

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