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
A modest decline in the average high-temperature is seen during September, decreasing from a moderately hot 75°F (23.9°C) in August to a pleasant 69.1°F (20.6°C). Hamilton encounters an average low-temperature of 58.6°F (14.8°C) during September nights.Humidity
The average relative humidity in September in Hamilton is 77%.Rainfall
In September, in Hamilton, the rain falls for 9.5 days. Throughout September, 0.63" (16mm) of precipitation is accumulated. Throughout the year, there are 113.7 rainfall days, and 9.69" (246mm) of precipitation is accumulated.Snowfall
In Hamilton, Massachusetts, snow does not fall in May through October.Daylight
In Hamilton, Massachusetts, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:09 am and sunset at 7:17 pm. On the last day of September, sunrise is at 6:40 am and sunset at 6:26 pm EDT.
Sunshine
In Hamilton, the average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 4 in September translates into this advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What are September temperatures in Hamilton?
What is the average humidity in September in Hamilton?
How many days does it rain in September in Hamilton?
When it does not snow in Hamilton?
What is the average length of the day in September in Hamilton?
When are sunrise and sunset in September in Hamilton?
How many hours of sunshine does Hamilton have in September?
How high is the UV index in September in Hamilton?
Average temperature in September
Hamilton, MA
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in September
Hamilton, MA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Hamilton, MA
- Average wind speed in September: 8.9mph
The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity in September
Hamilton, MA
- Average humidity in September: 77%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
Hamilton, MA
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is July (1.1").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Hamilton, MA
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in September
Hamilton, MA
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.94").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Hamilton, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.6 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
Hamilton, MA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in September
Hamilton, MA
- Average sunshine days in September: 18.7 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (16 days).
Average UV index in September
Hamilton, MA
- Average UV index in September: 4
The months with the highest UV index are July and August (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
Hamilton, MA
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Hamilton, MA
- 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).
Hamilton, Massachusetts, USA
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