September weather forecast
Charlotte Hall, MD

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Weather in September

September, the first month of the autumn in Charlotte Hall, is still a warm month, with an average temperature fluctuating between 64.4°F (18°C) and 77.5°F (25.3°C).

Temperature

September brings a minor shift in the average high-temperature, adjusting from a warm 83.7°F (28.7°C) in August to a still moderately hot 77.5°F (25.3°C). The average temperature during September nights is registered at a comfortable 64.4°F (18°C).

Humidity

In September, the average relative humidity in Charlotte Hall is 77%.

Rainfall

In Charlotte Hall, in September, it is raining for 13.9 days, with typically 2.68" (68mm) of accumulated precipitation. In Charlotte Hall, during the entire year, the rain falls for 158.1 days and collects up to 33.07" (840mm) of precipitation.

Snowfall

In Charlotte Hall, snow does not fall in April through October.

Daylight

In September, the average length of the day is 12h and 25min.
On the first day of September, sunrise is at 6:37 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm EDT.

Sunshine

In Charlotte Hall, the average sunshine in September is 9h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

An average high-temperature, in September, in Charlotte Hall, is 77.5°F (25.3°C) and the average low-temperature is 64.4°F (18°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 91.4°F (33°C).

What is the average humidity in September?

In Charlotte Hall, the average relative humidity in September is 77%.

How many days does it rain in September?

In Charlotte Hall, during September, the rain falls for 13.9 days and regularly aggregates up to 2.68" (68mm) of precipitation.

When it does not snow?

In Charlotte Hall, Maryland, snow does not fall in April through October.

How many hours of daylight does Charlotte Hall have in September?

The average day length in September is 12h and 25min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:37 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 9h.

What is the UV index reading in September?

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Charlotte Hall, MD

Average temperature in September - Charlotte Hall, MD
  • Average high temperature in September: 77.5°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in September: 64.4°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (30°F).

Average pressure in September
Charlotte Hall, MD

Average pressure in September - Charlotte Hall, MD
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in September
Charlotte Hall, MD

Average wind speed in September - Charlotte Hall, MD
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is March (9.2mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).

Average humidity in September
Charlotte Hall, MD

Average humidity in September - Charlotte Hall, MD
  • Average humidity in September: 77%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (72%).

Average rainfall in September
Charlotte Hall, MD

Average rainfall in September - Charlotte Hall, MD
  • Average rainfall in September: 2.68"

The wettest month (with the highest rainfall) is July (4.41").
The driest month (with the least rainfall) is January (1.81").

Average rainfall days in September
Charlotte Hall, MD

Average rainfall days in September - Charlotte Hall, MD
  • Average rainfall days in September: 13.9 days

The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is November (8 days).

Average snowfall in September
Charlotte Hall, MD

Average snowfall in September - Charlotte Hall, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Charlotte Hall, MD

Average snowfall days in September - Charlotte Hall, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Charlotte Hall, MD

Average daylight in September / Average sunshine in September - Charlotte Hall, 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: 9h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in September
Charlotte Hall, MD

Average sunshine days in September - Charlotte Hall, MD
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (11.3 days).

Average UV index in September
Charlotte Hall, MD

Average UV index in September - Charlotte Hall, 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 and December (UV index 2).

Average cloud cover in September
Charlotte Hall, MD

Average cloud cover in September - Charlotte Hall, MD
  • Average cloud cover in September: 35

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in September
Charlotte Hall, MD

Average visibility in September - Charlotte Hall, MD
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Charlotte Hall, Maryland, USA

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