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
The shift from August to September includes a small decrease in the average high-temperature, from a warm 79.3°F (26.3°C) to an agreeable 72°F (22.2°C). In September, Hatfield experiences a temperature dip to an average of 52.7°F (11.5°C) at night.Humidity
The average relative humidity in September is 78%.Rainfall
In Hatfield, in September, it is raining for 10.3 days, with typically 0.98" (25mm) of accumulated precipitation. In Hatfield, during the entire year, the rain falls for 134.1 days and collects up to 14.84" (377mm) of precipitation.Snowfall
In Hatfield, Massachusetts, snow does not fall in June through October.Daylight
In Hatfield, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:16 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:33 pm EDT.
Sunshine
In Hatfield, the average sunshine in September is 8.7h.UV index
In Hatfield, Massachusetts, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Hatfield have in September?
What is the UV index intensity in September?
Average temperature in September
Hatfield, MA
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in September: 52.7°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°F).
Average pressure in September
Hatfield, 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
Hatfield, MA
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are January, February and March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Hatfield, 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
Hatfield, MA
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is October (1.61").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in September
Hatfield, MA
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in September
Hatfield, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Hatfield, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hatfield, 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 36min).
Average sunshine days in September
Hatfield, MA
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (13.7 days).
Average UV index in September
Hatfield, 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, October, November and December (UV index 2).
Average cloud cover in September
Hatfield, MA
- Average cloud cover in September: 37
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Hatfield, MA
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
Hatfield, Massachusetts, USA
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