September weather forecast
Loudon, NH

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Weather in September

September brings forth the advent of autumn, adding a vibrant color palette to Loudon's landscape. The transition from an August high of 78.4°F (25.8°C) to a milder 70.7°F (21.5°C) in this month is a sign of the changing seasons. The days, while still warm, start to have a subtle coolness in the air, foretelling the upcoming cooler months. Dwindling daylight hours coupled with cooler evenings, signals the retreat of summer. As September concludes, crimson and gold foliage blanket the city, welcoming a full-fledged fall in October.

Temperature

September's onset in Loudon corresponds with a subtle shift in the average high-temperature, slightly moving from a moderately hot 78.4°F (25.8°C) in August to a pleasant 70.7°F (21.5°C). Loudon throughout September, records an average low-temperature of 50.7°F (10.4°C).

Humidity

In September, the average relative humidity in Loudon, New Hampshire, is 79%.

Rainfall

September is the month with the least rainfall in Loudon, New Hampshire. Rain falls for 10.5 days and accumulates 1.57" (40mm) of precipitation.

Snowfall

June through September are months without snowfall in Loudon, New Hampshire.

Daylight

The average length of the day in September in Loudon is 12h and 29min.
On the first day of September in Loudon, sunrise is at 6:10 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:28 pm EDT.

Sunshine

In Loudon, the average sunshine in September is 8.4h.

UV index

The average daily maximum UV index in September in Loudon, New Hampshire, is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
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Frequently asked questions

What are the temperatures in Loudon in September?

In September, the average high-temperature and low-temperature are 70.7°F (21.5°C) and 50.7°F (10.4°C) respectively.

What is the average humidity in September in Loudon?

In September, the average relative humidity in Loudon, New Hampshire, is 79%.

What is the driest month in Loudon?

The month with the least rainfall in Loudon, New Hampshire, is September, when the rain falls for 10.5 days and typically collects 1.57" (40mm) of precipitation.

How much does it rain in Loudon in September?

In Loudon, during September, the rain falls for 10.5 days and regularly aggregates up to 1.57" (40mm) of precipitation.

When it does not snow in Loudon?

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

Does it snow in Loudon in September?

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

How many hours of daylight does Loudon have in September?

In September, the average day length in Loudon, New Hampshire, is 12h and 29min.

When are sunrise and sunset in September in Loudon?

On the first day of September in Loudon, New Hampshire, sunrise is at 6:10 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:28 pm EDT.

How many hours of sunshine does Loudon have in September?

In Loudon, the average sunshine duration in September is 8.4h.

What is the UV index reading in September in Loudon?

In September, the average daily maximum UV index in Loudon is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's 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
Loudon, NH

Average temperature in September - Loudon, NH
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.7°F).

  • Average low temperature in September: 50.7°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).

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Average pressure in September
Loudon, NH

Average pressure in September - Loudon, 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 (29.91"Hg).

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Average wind speed in September
Loudon, NH

Average wind speed in September - Loudon, NH
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in September
Loudon, NH

Average humidity in September - Loudon, NH
  • Average humidity in September: 79%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in September
Loudon, NH

Average rainfall in September - Loudon, NH
  • Average rainfall in September: 1.57"

The wettest month (with the highest rainfall) is October (3.15").
The driest month (with the least rainfall) is September (1.57").

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Average rainfall days in September
Loudon, NH

Average rainfall days in September - Loudon, NH
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is April (15.2 days).
The month with the least rainy days is January (6.8 days).

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Average snowfall in September
Loudon, NH

Average snowfall in September - Loudon, 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
Loudon, NH

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

The month with the highest number of snowfall days is January (11 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
Loudon, NH

Average daylight in September / Average sunshine in September - Loudon, 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 2min

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
Loudon, NH

Average sunshine days in September - Loudon, NH
  • Average sunshine days in September: 17.2 days

The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is April (12.4 days).

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Average UV index in September
Loudon, NH

Average UV index in September - Loudon, 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
Loudon, NH

Average cloud cover in September - Loudon, NH
  • Average cloud cover in September: 38

The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in September
Loudon, NH

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

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

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Loudon, New Hampshire, USA

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