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 signifies a minor drop in average high-temperature, transitioning from a warm 83.1°F (28.4°C) in August to a still moderately hot 76.5°F (24.7°C). The average nighttime temperature lowers to a mild 59.7°F (15.4°C) throughout September.Humidity
The average relative humidity in September is 76%.Rainfall
In September, the rain falls for 14.2 days. Throughout September, 2.4" (61mm) of precipitation is accumulated. In Randallstown, during the entire year, the rain falls for 167.8 days and collects up to 34.53" (877mm) of precipitation.Snowfall
In Randallstown, Maryland, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:36 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:50 pm EDT.
Sunshine
In Randallstown, the average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
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?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Randallstown have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Randallstown have in September?
What is the UV index reading in September?
Average temperature in September
Randallstown, MD
- Average high temperature in September: 76.5°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 59.7°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).
Average pressure in September
Randallstown, 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 (29.94"Hg).
Average wind speed in September
Randallstown, MD
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Randallstown, MD
- Average humidity in September: 76%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are April and July (73%).
Average rainfall in September
Randallstown, MD
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is August (4.37").
The driest months (with the least rainfall) are January and February (2.28").
Average rainfall days in September
Randallstown, MD
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in September
Randallstown, MD
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.39").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Randallstown, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.1 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
Randallstown, MD
- Average daylight in September: 12h and 2min
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: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 0min).
Average sunshine days in September
Randallstown, MD
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in September
Randallstown, 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, November and December (UV index 2).
Average cloud cover in September
Randallstown, MD
- Average cloud cover in September: 36
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Randallstown, 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).
Randallstown, Maryland, USA
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