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
September ushers in a minute temperature change, with average high-temperatures reducing from August's 85.5°F (29.7°C) to a still warm 79°F (26.1°C). Welcome's average low-temperature in September is measured at an enjoyable 62.2°F (16.8°C).Humidity
In Welcome, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.3 days and typically collects 1.97" (50mm) of precipitation.Snowfall
In Welcome, Maryland, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September, sunrise is at 6:38 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:52 pm EDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
In Welcome, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Around midday, solar radiation is most harmful; hence, exposure should be limited. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Welcome, MD
- Average high temperature in September: 79°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (42.3°F).
- Average low temperature in September: 62.2°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 (28.8°F).
Average pressure in September
Welcome, MD
- Average pressure in September: 30.05"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
Welcome, MD
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in September
Welcome, MD
- Average humidity in September: 77%
The months with the highest relative humidity are May and December (78%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Welcome, MD
- Average rainfall in September: 1.97"
The wettest months (with the highest rainfall) are July and August (3.19").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Welcome, MD
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in September
Welcome, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Welcome, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4 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
Welcome, MD
- 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 30min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Welcome, MD
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in September
Welcome, MD
- 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, February and December (UV index 2).
Average cloud cover in September
Welcome, MD
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Welcome, MD
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Welcome, Maryland, USA
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