September weather forecast
Concord, NH

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A rocky coast overlooking beach homes in Rye, Concord point, New Hampshire
A rocky coast overlooking beach homes in Rye, Concord point, New Hampshire

Weather in September

September ushers in autumn that heralds the end of the warm season in Concord. A notable decrease in average temperature from August's 78.8°F (26°C) symbolizes the incoming fall. September decoration includes changing foliage, with fallen leaves creating a colorful carpet along the city's byways. The transition into cooler days is supported by crisp mornings and noticeably shorter daylight hours. Despite changes, the latter part of the day frequently offers balmy conditions, perfect for afternoon strolls.

Temperature

In September, the meteorological conditions change slightly, with the average high-temperature moving from a warm 78.8°F (26°C) in August to an agreeable 71.4°F (21.9°C). In Concord, the average nighttime temperature during September is a fresh 52°F (11.1°C).

Humidity

In September, the average relative humidity is 78%.

Rainfall

The month with the least rainfall is September, when the rain falls for 10.7 days and typically collects 1.65" (42mm) of precipitation.

Snowfall

In Concord, snow does not fall in June through September.

Daylight

In Concord, the average length of the day in September is 12h and 29min.
On the first day of September in Concord, sunrise is at 6:11 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:28 pm EDT.

Sunshine

In Concord, the average sunshine in September is 8.5h.

UV index

In Concord, 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: The maximum UV index, 4 during September, leads to the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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Frequently asked questions

What is the temperature in September in Concord?

The average high-temperature, in September, in Concord, is 71.4°F (21.9°C), while the average low-temperature is 52°F (11.1°C). In July, the average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, is calculated to be 86°F (30°C).

What is the average humidity in September in Concord?

The average relative humidity in September in Concord, New Hampshire, is 78%.

What is the driest month in Concord?

September is the month with the least rainfall in Concord, New Hampshire. Rain falls for 10.7 days and accumulates 1.65" (42mm) of precipitation.

How much does it rain in Concord in September?

In Concord, New Hampshire, in September, it is raining for 10.7 days, with typically 1.65" (42mm) of accumulated precipitation.

When it does not snow in Concord?

In Concord, New Hampshire, snow does not fall in June through September.

Does it snow in Concord in September?

In Concord, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Concord?

In Concord, the average day length in September is 12h and 29min.

What time are sunrise and sunset in September in Concord?

In September, on the first day of the month, sunrise is at 6:11 am and sunset at 7:20 pm. On the last day of the month, in Concord, New Hampshire, sunrise is at 6:43 am and sunset at 6:28 pm EDT.

How long on average sun shines in September in Concord?

The average sunshine duration in September in Concord is 8.5h.

What is the UV index reading in September in Concord?

In September, the average daily maximum UV index in Concord, New Hampshire, is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Concord, NH

Average temperature in September - Concord, NH
  • Average high temperature in September: 71.4°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 (28.4°F).

  • Average low temperature in September: 52°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).

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Average pressure in September
Concord, NH

Average pressure in September - Concord, NH
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
Concord, NH

Average wind speed in September - Concord, NH
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is January (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in September
Concord, NH

Average humidity in September - Concord, NH
  • Average humidity in September: 78%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in September
Concord, NH

Average rainfall in September - Concord, NH
  • Average rainfall in September: 1.65"

The wettest month (with the highest rainfall) is October (3.03").
The driest month (with the least rainfall) is September (1.65").

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Average rainfall days in September
Concord, NH

Average rainfall days in September - Concord, NH
  • Average rainfall days in September: 10.7 days

The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (6.5 days).

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Average snowfall in September
Concord, NH

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

The month with the highest snowfall is February (7.36").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Concord, NH

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

The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Concord, NH

Average daylight in September / Average sunshine in September - Concord, NH
  • 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 0min).

  • Average sunshine in September: 8h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

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Average sunshine days in September
Concord, NH

Average sunshine days in September - Concord, NH
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is September (17.4 days).
The month with the least sunshine days is April (13.6 days).

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Average UV index in September
Concord, NH

Average UV index in September - Concord, NH
  • Average UV index in September: 4

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in September
Concord, NH

Average cloud cover in September - Concord, NH
  • Average cloud cover in September: 37

The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in September
Concord, NH

Average visibility in September - Concord, NH
  • Average visibility in September: 5mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

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Concord, New Hampshire, USA

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