September weather forecast
Byron, VA

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Weather in September

September, the first month of the autumn in Byron, is also a moderately hot month, with an average temperature ranging between max 75°F (23.9°C) and min 52.9°F (11.6°C).

Temperature

Byron's September weather features a light decline in high-temperatures, reducing from a warm 80.8°F (27.1°C) in August to a still moderately hot 75°F (23.9°C). September presents a pronounced divergence from daily peak temperatures, with the average low-temperature of 52.9°F (11.6°C).

Humidity

In September, the average relative humidity is 79%.

Rainfall

The month with the least rainfall is September, when the rain falls for 14.5 days and typically collects 1.5" (38mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In Byron, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:55 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:08 pm EDT.

Sunshine

In Byron, the average sunshine in September is 8.4h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 4 suggests these recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Updated: Jul 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

Byron in September has an average high-temperature of 75°F (23.9°C) and an average low-temperature of 52.9°F (11.6°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 86°F (30°C).

What is the average humidity in September?

In Byron, the average relative humidity in September is 79%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 14.5 days and accumulates 1.5" (38mm) of precipitation.

How much does it rain in September?

In September, the rain falls for 14.5 days. Throughout September, 1.5" (38mm) of precipitation is accumulated.

When it does not snow?

In Byron, snow does not fall in June through September.

Does it snow in September?

In Byron, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Byron have in September?

In Byron, the average day length in September is 12h and 25min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:55 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:08 pm EDT.

How many hours of sunshine does Byron have in September?

The average sunshine duration in September is 8.4h.

What is the UV index reading in September?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to 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
Byron, VA

Average temperature in September - Byron, VA
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in September: 52.9°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

Average pressure in September
Byron, VA

Average pressure in September - Byron, VA
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

Average wind speed in September
Byron, VA

Average wind speed in September - Byron, VA
  • Average wind speed in September: 4.6mph

The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

Average humidity in September
Byron, VA

Average humidity in September - Byron, VA
  • Average humidity in September: 79%

The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April, June, July, August and November (77%).

Average rainfall in September
Byron, VA

Average rainfall in September - Byron, VA
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is September (1.5").

Average rainfall days in September
Byron, VA

Average rainfall days in September - Byron, VA
  • Average rainfall days in September: 14.5 days

The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is January (10 days).

Average snowfall in September
Byron, VA

Average snowfall in September - Byron, VA
  • Average snowfall in September: 0"

The month with the highest snowfall is December (6.18").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Byron, VA

Average snowfall days in September - Byron, VA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (11.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Byron, VA

Average daylight in September / Average sunshine in September - Byron, 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 2min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days in September
Byron, VA

Average sunshine days in September - Byron, VA
  • Average sunshine days in September: 12.5 days

The month with the most sunshine days is November (16.5 days).
The months with the least sunshine days are February and May (9.8 days).

Average UV index in September
Byron, VA

Average UV index in September - Byron, VA
  • Average UV index in September: 4

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Byron, VA

Average cloud cover in September - Byron, VA
  • Average cloud cover in September: 41

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 36).

Average visibility in September
Byron, VA

Average visibility in September - Byron, VA
  • Average visibility in September: 4mi

The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (5mi).
The month with the lowest visibility is September (4mi).

Byron, Virginia, USA

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