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
In Merryman Heights, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's 82.6°F (28.1°C) to a still warm 75.9°F (24.4°C). During the month of September, an average temperature of 59°F (15°C) is noted during the nights in Merryman Heights.Humidity
In September, the average relative humidity is 77%.Rainfall
In Merryman Heights, during September, the rain falls for 13.9 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, in Merryman Heights, Maryland, there are 159 rainfall days, and 31.61" (803mm) of precipitation is accumulated.Snowfall
In Merryman Heights, snow does not fall in June through October.Daylight
The average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:36 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:51 pm EDT.
Sunshine
In Merryman Heights, the average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What is the temperature in September in Merryman Heights?
What is the average humidity in September in Merryman Heights?
How many days does it rain in September in Merryman Heights?
When it does not snow in Merryman Heights?
What is the average length of the day in September in Merryman Heights?
When are sunrise and sunset in September in Merryman Heights?
How long on average sun shines in September in Merryman Heights?
What is the UV index reading in September in Merryman Heights?
Average temperature in September
Merryman Heights, MD
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in September
Merryman Heights, 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
Merryman Heights, MD
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in September
Merryman Heights, MD
- Average humidity in September: 77%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are April and July (74%).
Average rainfall in September
Merryman Heights, MD
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is February (1.97").
Average rainfall days in September
Merryman Heights, MD
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in September
Merryman Heights, MD
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.8").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Merryman Heights, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Merryman Heights, 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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).
Average sunshine days in September
Merryman Heights, MD
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in September
Merryman Heights, MD
- Average UV index in September: 4
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
Merryman Heights, MD
- Average cloud cover in September: 37
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Merryman Heights, 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).
Merryman Heights, Maryland, USA
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