Manchester
New Hampshire, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Manchester, NH

The colorful buildings in the city of Manchester, New Hampshire, right next to scenic trees on the seashore, a beautiful glass image in the river below
The colorful buildings in the city of Manchester, New Hampshire, right next to scenic trees on the seashore, a beautiful glass image in the river below
September, the first month of the autumn, in Manchester, is also an agreeable month, with temperature in the range of an average high of 72.7°F (22.6°C) and an average low of 52.5°F (11.4°C).

Temperature

In Manchester, the average high-temperature in September slightly decreases, from a moderately hot 81°F (27.2°C) in August, to a pleasant 72.7°F (22.6°C). The average low-temperature, is 52.5°F (11.4°C).

Rainfall

In Manchester, it is raining for 9.9 days, with typically 3.8" (96.8mm) of accumulated precipitation. In Manchester, New Hampshire, during the entire year, the rain falls for 120.5 days and collects up to 44.6" (1132.4mm) of precipitation.

Snowfall

Throughout the year, 46.7" (1186.3mm) of snow is accumulated.

Daylight

In September, the average length of the day in Manchester is 12.5h.

Sunshine

In Manchester, the average sunshine is 7h.

UV index

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Manchester?

In September, in Manchester, the average high-temperature is 72.7°F (22.6°C), and the average low-temperature is 52.5°F (11.4°C).

How much does it rain in Manchester in September?

In Manchester, New Hampshire, in September, it is raining for 9.9 days, with typically 3.8" (96.8mm) of accumulated precipitation.

How many hours of daylight does Manchester have in September?

In September, the average length of the day in Manchester is 12.5h.

How long on average sun shines in September in Manchester?

In September, the average sunshine in Manchester, New Hampshire, is 7h.

What is the UV index intensity in September in Manchester?

In Manchester, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.
Average temperature in September - Manchester, NH
  • Average high temperature in September: 72.6°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.1°F).

  • Average low temperature in September: 52.5°F

The month with the highest average low temperature is July (62.7°F).
The coldest month (with the lowest average low temperature) is January (15.7°F).

Average rainfall in September - Manchester, NH
  • Average rainfall in September: 3.8"

The wettest month (with the highest rainfall) is March (4.3").
The driest month (with the lowest rainfall) is February (2.8").

Average rainfall days in September - Manchester, NH
  • Average rainfall days in September: 9.9 days

The month with the highest number of rainy days is April (11.2 days).
The month with the lowest number of rainy days is February (8 days).

Average snowfall in September - Manchester, NH
  • Average snowfall in September: 0"

The month with the highest snowfall is January (14.4").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in September - Manchester, NH
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.2 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Manchester, NH
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 7h

The month with most sunshine is July (Average sunshine: 10h).
Months with least sunshine are November and December (Average sunshine: 4).

Average UV index in September - Manchester, NH
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).