Normal weather for Hackettstown in September
It's warm in September in Hackettstown with an average temperature of 25°C. Temperatures this month range from a low of 20°C to a high of 29°C. At night, you can expect temperatures between 11°C and 17°C.
In September, there is an average of 108 mm of precipitation, spread over 14 days. The wind speed is around 3 Bft, mostly coming from the South.
Hackettstown in September |
London | ||
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25°C | 20°C | |
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29°C | 22°C | |
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20°C | 17°C | |
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108 mm | 44 mm | |
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14 days | 8 days |
Start of September
The month of September starts in Hackettstown with hot temperatures, averaging around 27°C during the day and nights close to 16°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
Mid-September
By mid-September, the average daytime temperature drops to around 25°C, with nights close to 14°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
Temperatures vary between day and night, so it’s smart to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. In the evening and morning, we recommend a light coat, jumper or cardigan, and long trousers.
End of September
By the end of September, the average daytime temperature in Hackettstown will be around 24°C, with nights close to 12°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
As it gets cooler in the evening, it’s best to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. In the evening and morning, we recommend a light coat, jumper or cardigan, and long trousers.
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UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Hackettstown?
After some sun? Then September isn’t the best time to be in Hackettstown. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Hackettstown in September
With 34°C, Hackettstown hit the highest temperature in the last 10 years in September 2015. The lowest daytime temperature in this month was 13°C in 2018. The extreme night temperatures ranged from a low of 1°C to a high of 23°C.
Check out the climate of Hackettstown for all months and discover the best travel time
Daily Temperature in September in Hackettstown
This chart shows the average daily temperatures, both day and night, for each day in September in Hackettstown, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Hackettstown
The chart below shows the average daily precipitation in September for Hackettstown, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 14 days of rain in Hackettstown.
Daily UV Index in September in Hackettstown
This chart shows the average daily UV index in September in Hackettstown, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Hackettstown Over the Years
This chart shows the average temperature in September in Hackettstown, measured in degrees Celsius, over the past years.
Total Precipitation in September in Hackettstown Over the Years
This chart shows the average precipitation in September in Hackettstown, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Hackettstown
Click on a specific day in September for detailed info on the typical weather on that day in Hackettstown. Check out the historical temperatures and precipitation over the past 10 years on this day.
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Weather experiences in September in Hackettstown
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Average Weather in Hackettstown by Month
Click on a month below to see detailed weather info for Hackettstown. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Hackettstown for all months at once