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
In the transition to September, Amherst observes a minor drop in the average high-temperature, shifting from a moderately hot 80.1°F (26.7°C) in August to an agreeable 72.5°F (22.5°C). In September, the temperature drops to an average of 52.9°F (11.6°C) at night.Humidity
The average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall in Amherst. Rain falls for 10.7 days and accumulates 1.57" (40mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:23 pm. On the last day of September, in Amherst, sunrise is at 6:46 am and sunset at 6:32 pm EDT.
Sunshine
In Amherst, the average sunshine in September is 8.7h.UV index
In Amherst, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Heed the precautions - It is counselled to guard against solar damage. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Frequently asked questions
What is the average September temperature in Amherst?
What is the average humidity in September in Amherst?
What is the driest month in Amherst?
How many days does it rain in September in Amherst?
When it does not snow in Amherst?
Does it snow in Amherst in September?
How many hours of daylight does Amherst have in September?
What time are sunrise and sunset in September in Amherst?
How long on average sun shines in September in Amherst?
What is the UV index intensity in September in Amherst?
Average temperature in September
Amherst, MA
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in September
Amherst, 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 (29.92"Hg).
Average wind speed in September
Amherst, MA
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Amherst, MA
- Average humidity in September: 78%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Amherst, MA
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is December (2.87").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Amherst, MA
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (14.5 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in September
Amherst, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.14").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Amherst, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Amherst, 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 6min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Amherst, MA
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is March (13.6 days).
Average UV index in September
Amherst, MA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Amherst, MA
- Average cloud cover in September: 36
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Amherst, MA
- Average visibility in September: 5mi
The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).
Amherst, Massachusetts, USA
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