September weather forecastFlintstone, MD
September
Weather in September
September, the first month of the autumn in Flintstone, is also a moderately hot month, with an average temperature ranging between max 74.1°F (23.4°C) and min 53.2°F (11.8°C).Temperature
The onset of September brings a small shift in high-temperatures, falling from a moderately hot 81°F (27.2°C) in August to a still warm 74.1°F (23.4°C). In September, Flintstone encounters an average low-temperature of 53.2°F (11.8°C) during the night.Humidity
The average relative humidity in September is 79%.Rainfall
In Flintstone, in September, it is raining for 13.6 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, in Flintstone, there are 168 rainfall days, and 23.15" (588mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:43 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:57 pm EDT.
Sunshine
The average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September in Flintstone is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Flintstone, MD
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in September
Flintstone, MD
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Flintstone, MD
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are January and February (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Flintstone, MD
- Average humidity in September: 79%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in September
Flintstone, MD
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is November (1.46").
Average rainfall days in September
Flintstone, MD
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in September
Flintstone, MD
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Flintstone, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Flintstone, MD
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Flintstone, MD
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (9.9 days).
Average UV index in September
Flintstone, MD
- 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, March, November and December (UV index 2).
Average cloud cover in September
Flintstone, MD
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Flintstone, MD
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
