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
Armstrong's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's moderately hot 80.6°F (27°C) to a still warm 74.7°F (23.7°C). Armstrong's September nights bring a significant temperature shift, averaging at a cool 53.1°F (11.7°C).Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall in Armstrong, Virginia. Rain falls for 13.3 days and accumulates 1.73" (44mm) of precipitation.Snowfall
In Armstrong, snow does not fall in June through September.Daylight
In Armstrong, Virginia, the average length of the day in September is 12h and 25min.On the first day of September in Armstrong, sunrise is at 6:48 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:02 pm EDT.
Sunshine
In September, the average sunshine in Armstrong is 8.4h.UV index
The average daily maximum UV index in September in Armstrong is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 4 in September translates into these instructions:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Armstrong in September?
What is the average humidity in September in Armstrong?
What is the driest month in Armstrong?
How much does it rain in Armstrong in September?
When it does not snow in Armstrong?
Does it snow in Armstrong in September?
How many hours of daylight does Armstrong have in September?
What time are sunrise and sunset in September in Armstrong?
How many hours of sunshine does Armstrong have in September?
What is the UV index intensity in September in Armstrong?
Average temperature in September
Armstrong, VA
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in September: 53.1°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 (22.1°F).
Average pressure in September
Armstrong, VA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Armstrong, VA
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is February (7.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Armstrong, VA
- Average humidity in September: 79%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June and July (76%).
Average rainfall in September
Armstrong, VA
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in September
Armstrong, VA
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in September
Armstrong, VA
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Armstrong, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Armstrong, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- 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: 5h and 0min).
Average sunshine days in September
Armstrong, VA
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (9.2 days).
Average UV index in September
Armstrong, VA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Armstrong, VA
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June, July and November (Cloud cover 36).
Average visibility in September
Armstrong, VA
- Average visibility in September: 4mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (5mi).
The months with the lowest visibility are May and September (4mi).
Armstrong, Virginia, USA
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