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
Cheltenham's September weather shows a modest shift in high-temperatures, falling from August's 84.6°F (29.2°C) to a still warm 78.3°F (25.7°C). In September, the nighttime temperature lowers to an average of 63°F (17.2°C).Humidity
The average relative humidity in September is 75%.Rainfall
In Cheltenham, in September, during 13.9 rainfall days, 2.36" (60mm) of precipitation is typically accumulated. In Cheltenham, during the entire year, the rain falls for 164.8 days and collects up to 32.87" (835mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of September, in Cheltenham, sunrise is at 7:02 am and sunset at 6:51 pm EDT.
Sunshine
In Cheltenham, Maryland, the average sunshine in September is 9.1h.UV index
In Cheltenham, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during September translates into these guidelines:
Undertake protective steps - Recommendations to avoid sunburn are issued. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What is the usual temperature for Cheltenham in September?
What is the average humidity in September in Cheltenham?
How many days does it rain in September in Cheltenham?
When it does not snow in Cheltenham?
How many hours of daylight does Cheltenham have in September?
When is the sunrise / sunset in September in Cheltenham?
How long on average sun shines in September in Cheltenham?
What is the UV index intensity in September in Cheltenham?
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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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