September weather forecastCambridge, MD
September
Weather in September
September in Cambridge, Maryland, welcomes the onset of meteorological autumn, causing a noticeable shift in weather patterns. The scorching summer heat begins to dissipate, making way for the milder, more pleasant climatic conditions of fall. September's weather is comparatively milder and significantly less humid than August's, bringing a welcomed relief from the summer. The peak temperature bears a dip, averaging a high of 77.5°F (25.3°C), signaling the approaching fall. As autumn leaves start to fall, the backdrop of Cambridge dons a reddish-golden hue, making September a photographer's paradise.Temperature
With the onset of September, Cambridge's average high-temperature slightly adjusts, moderately receding from August's 83.1°F (28.4°C) to a still moderately hot 77.5°F (25.3°C). An average low-temperature of 64°F (17.8°C) is common during the nights of September.Humidity
The average relative humidity in September in Cambridge is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 9.5 days and accumulates 0.47" (12mm) of precipitation.Snowfall
In Cambridge, snow does not fall in April through October.Ocean temperature
In Cambridge, the average seawater temperature in September is 69.8°F (21°C).Note: Swimming in water at 69.8°F (21°C) is not a pleasing experience for the majority. As the temperature descends from 69.8°F (21°C) to 59°F (15°C), controlling breathing becomes increasingly hard.
Daylight
In Cambridge, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:33 pm. On the last day of September, in Cambridge, sunrise is at 6:59 am and sunset at 6:48 pm EDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
In Cambridge, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Undertake precautions - It is suggested to shield oneself from sunburn. To guard against the harmful effects of the Sun, minimize exposure during midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cambridge, MD
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in September: 64°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in September
Cambridge, MD
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Cambridge, MD
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Cambridge, MD
- Average humidity in September: 78%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (73%).
Average rainfall in September
Cambridge, MD
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is August (1.46").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in September
Cambridge, MD
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is August (11.6 days).
The months with the least rainy days are January and November (6.3 days).
Average snowfall in September
Cambridge, MD
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Cambridge, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in September
Cambridge, MD
- Average sea temperature in September: 70°F
The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (34°F).
Average daylight in September /
Average sunshine in September
Cambridge, MD
- Average daylight in September: 12h and 24min
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 12min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in September
Cambridge, MD
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is August (16.8 days).
Average UV index in September
Cambridge, 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
Cambridge, MD
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Cambridge, 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).
