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
The transition into September shows a subtle variation to a still moderately hot 74.3°F (23.5°C) from August's 79.5°F (26.4°C) in the average high-temperature. Grayson in September anticipates an average nighttime temperature of 53.1°F (11.7°C).Humidity
In Grayson, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall in Grayson is September, when the rain falls for 14.2 days and typically collects 1.57" (40mm) of precipitation.Snowfall
June through September are months without snowfall in Grayson, North Carolina.Daylight
In September, the average length of the day is 12h and 24min.On the first day of September in Grayson, North Carolina, sunrise is at 6:58 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:11 pm EDT.
Sunshine
The average sunshine in September in Grayson, North Carolina, is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Frequently asked questions
What are September temperatures in Grayson?
What is the average humidity in September in Grayson?
What is the driest month in Grayson?
How much does it rain in Grayson in September?
When it does not snow in Grayson?
Does it snow in Grayson in September?
How many hours of daylight does Grayson have in September?
What time are sunrise and sunset in September in Grayson?
How many hours of sunshine does Grayson have in September?
How high is the UV index in September in Grayson?
Average temperature in September
Grayson, NC
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 53.1°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Grayson, NC
- 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
Grayson, NC
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Grayson, NC
- Average humidity in September: 79%
The months with the highest relative humidity are February, March and December (80%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Grayson, NC
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is February (3.31").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Grayson, NC
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is July (19.2 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in September
Grayson, NC
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grayson, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grayson, NC
- 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 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Grayson, NC
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is February (8.9 days).
Average UV index in September
Grayson, NC
- 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
Grayson, NC
- Average cloud cover in September: 40
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are June, July and August (Cloud cover 37).
Average visibility in September
Grayson, NC
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Grayson, North Carolina, USA
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