September weather forecast
Cheltenham, MD

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Cheltenham, Maryland, with an average temperature varying between 78.3°F (25.7°C) and 63°F (17.2°C).

Temperature

A mild shift in the average high-temperature occurs in September, reducing from a moderately hot 84.6°F (29.2°C) in August to a still warm 78.3°F (25.7°C). Cheltenham encounters an average low-temperature of 63°F (17.2°C) during September nights.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Cheltenham, during September, the rain falls for 13.9 days and regularly aggregates up to 2.36" (60mm) of precipitation. Throughout the year, there are 164.8 rainfall days, and 32.87" (835mm) of precipitation is accumulated.

Snowfall

In Cheltenham, snow does not fall in May through October.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm EDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transforms into the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. To protect against the Sun's most potent rays, avoid direct exposure around midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

An average high-temperature, in September, in Cheltenham, is 78.3°F (25.7°C) and the average low-temperature is 63°F (17.2°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 93.2°F (34°C).

What is the average humidity in September?

The average relative humidity in September is 75%.

How many days does it rain in September?

In September, the rain falls for 13.9 days. Throughout September, 2.36" (60mm) of precipitation is accumulated.

When it does not snow?

In Cheltenham, snow does not fall in May through October.

What is the average length of the day in September?

The average day length in September is 12h and 26min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:37 am and sunset at 7:37 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?

The average sunshine duration in September is 9.1h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability 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
Cheltenham, MD

Average temperature in September - Cheltenham, MD
  • Average high temperature in September: 78.3°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in September: 63°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).

Average pressure in September
Cheltenham, MD

Average pressure in September - Cheltenham, 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 (29.94"Hg).

Average wind speed in September
Cheltenham, MD

Average wind speed in September - Cheltenham, MD
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).

Average humidity in September
Cheltenham, MD

Average humidity in September - Cheltenham, MD
  • Average humidity in September: 75%

The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are January, March and April (72%).

Average rainfall in September
Cheltenham, MD

Average rainfall in September - Cheltenham, MD
  • Average rainfall in September: 2.36"

The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the least rainfall) is January (2.05").

Average rainfall days in September
Cheltenham, MD

Average rainfall days in September - Cheltenham, MD
  • Average rainfall days in September: 13.9 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in September
Cheltenham, MD

Average snowfall in September - Cheltenham, MD
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Cheltenham, MD

Average snowfall days in September - Cheltenham, MD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.6 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
Cheltenham, MD

Average daylight in September / Average sunshine in September - Cheltenham, 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 1min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

Average sunshine days in September
Cheltenham, MD

Average sunshine days in September - Cheltenham, MD
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.8 days).

Average UV index in September
Cheltenham, MD

Average UV index in September - Cheltenham, 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, November and December (UV index 2).

Average cloud cover in September
Cheltenham, MD

Average cloud cover in September - Cheltenham, MD
  • Average cloud cover in September: 34

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in September
Cheltenham, MD

Average visibility in September - Cheltenham, 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).

Cheltenham, Maryland, USA

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