September weather forecast and climate
Concord, NH

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, the first month of the autumn, in Concord, is also an agreeable month, with average temperature ranging between min 52°F (11.1°C) and max 71.4°F (21.9°C).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 78.8°F (26°C) in August, to an agreeable 71.4°F (21.9°C). The average low-temperature, in Concord, is 52°F (11.1°C).

Humidity

The average relative humidity in September is 78%.

Rainfall

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

Snowfall

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

Daylight

In Concord, the average length of the day is 12.5h.

Sunshine

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

UV index

The average daily maximum UV index in Concord is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the temperature in September in Concord?

In Concord, in September, the average high-temperature is 71.4°F (21.9°C), and the average low-temperature is 52°F (11.1°C).

What is the average humidity in September in Concord?

In September, the average relative humidity is 78%.

How much does it rain in Concord in September?

In Concord, in September, during 10.7 rainfall days, 1.65" (42mm) of precipitation is typically accumulated.

What is the driest month in Concord?

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

Does it snow in Concord in September?

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

When it does not snow in Concord?

In Concord snow does not fall in June through September.

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

The average length of the day in September in Concord is 12.5h.

How long on average sun shines in September in Concord?

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

How high is the UV index in September in Concord?

The average daily maximum UV index in September in Concord, New Hampshire, is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to the UV radiation.

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"

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

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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").
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).
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: 12.5h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in September: 8.5h

The month with the most sunshine is August (Average sunshine: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.4h).

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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

Months with the highest UV index are July and August (UV index 6).
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

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).
Months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

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