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
September implies a soft temperature shift, with average high-temperatures reducing from August's warm 79.5°F (26.4°C) to a pleasant 72°F (22.2°C). An average nighttime temperature of 53.8°F (12.1°C) is recorded during September.Humidity
The average relative humidity in September in Charlton is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 12.4 days and accumulates 1.81" (46mm) of precipitation.Snowfall
June through September are months without snowfall in Charlton.Daylight
In Charlton, the average length of the day in September is 12h and 28min.On the first day of September in Charlton, sunrise is at 6:14 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:30 pm EDT.
Sunshine
In September, the average sunshine in Charlton is 8h.UV index
The average daily maximum UV index in September in Charlton is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Undertake precautions - Guarding against sun damage is counselled. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What are September temperatures in Charlton?
What is the average humidity in September in Charlton?
What is the driest month in Charlton?
How many days does it rain in September in Charlton?
When it does not snow in Charlton?
Does it snow in Charlton in September?
What is the average length of the day in September in Charlton?
What time are sunrise and sunset in September in Charlton?
How many hours of sunshine does Charlton have in September?
What is the UV index intensity in September in Charlton?
Average temperature in September
Charlton, MA
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in September
Charlton, MA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Charlton, MA
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Charlton, MA
- Average humidity in September: 79%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Charlton, MA
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is December (3.11").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Charlton, MA
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is July (16.3 days).
The months with the least rainy days are January and February (7.8 days).
Average snowfall in September
Charlton, MA
- Average snowfall in September: 0"
The months with the highest snowfall are February and March (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Charlton, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Charlton, MA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Charlton, MA
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in September
Charlton, MA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Charlton, MA
- Average cloud cover in September: 42
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Charlton, MA
- Average visibility in September: 5mi
The months with the highest visibility are March, April, November and December (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and October (5mi).
Charlton, Massachusetts, USA
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