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
With the arrival of September, Haverhill experiences a modest decline in average high-temperatures, transitioning from a moderately hot 79.9°F (26.6°C) in August to an agreeable 72.3°F (22.4°C). September brings Haverhill a consistent average low-temperature of 55.6°F (13.1°C).Humidity
The average relative humidity in September in Haverhill is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 6 days and typically collects 0.2" (5mm) of precipitation.Snowfall
In Haverhill, snow does not fall in June through October.Daylight
In September, the average length of the day in Haverhill is 12h and 29min.On the first day of the month, sunrise is at 6:09 am and sunset at 7:18 pm. On the last day of September, sunrise is at 6:41 am and sunset at 6:26 pm EDT.
Sunshine
In Haverhill, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Haverhill is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 4 during September leads to these advisories:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoiding the Sun during its peak radiation time around midday is a healthy practice. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What are September temperatures in Haverhill?
What is the average humidity in September in Haverhill?
What is the driest month in Haverhill?
How many days does it rain in September in Haverhill?
When it does not snow in Haverhill?
What is the average length of the day in September in Haverhill?
When is the sunrise / sunset in September in Haverhill?
How long on average sun shines in September in Haverhill?
How high is the UV index in September in Haverhill?
Average temperature in September
Haverhill, MA
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in September
Haverhill, 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
Haverhill, MA
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Haverhill, MA
- Average humidity in September: 76%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (71%).
Average rainfall in September
Haverhill, MA
- Average rainfall in September: 0.2"
The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.2").
Average rainfall days in September
Haverhill, MA
- Average rainfall days in September: 6 days
The month with the highest number of rainy days is July (8.8 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in September
Haverhill, MA
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Haverhill, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Haverhill, 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 3min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Haverhill, MA
- Average sunshine days in September: 21.9 days
The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is April (18.4 days).
Average UV index in September
Haverhill, 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, November and December (UV index 2).
Average cloud cover in September
Haverhill, MA
- Average cloud cover in September: 35
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Haverhill, 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).
Haverhill, Massachusetts, USA
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