September weather forecast and climate
Jaffrey, NH

Weather in September

The first month of the autumn, September, is also an agreeable month in Jaffrey, New Hampshire, with average temperature ranging between min 51.4°F (10.8°C) and max 69.8°F (21°C).

Temperature

In Jaffrey, the average high-temperature slightly decreases, from a warm 77.5°F (25.3°C) in August, to a pleasant 69.8°F (21°C). The average low-temperature, in Jaffrey, is 51.4°F (10.8°C).

Humidity

In Jaffrey, the average relative humidity is 79%.

Rainfall

The month with the least rainfall in Jaffrey is September when the rain falls for 13 days and typically collects 2.17" (55mm) of precipitation.

Snowfall

In Jaffrey snow does not fall in June through September.

Daylight

The average length of the day in Jaffrey, New Hampshire, is 12.5h.

Sunshine

In September, the average sunshine in Jaffrey is 8h.

UV index

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. 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 average humidity in September in Jaffrey?

In September, the average relative humidity in Jaffrey is 79%.

What is the driest month in Jaffrey?

September is the month with the least rainfall in Jaffrey, New Hampshire. Rain falls for 13 days and accumulates 2.17" (55mm) of precipitation.

How much does it rain in Jaffrey in September?

In Jaffrey, New Hampshire, in September, it is raining for 13 days, with typically 2.17" (55mm) of accumulated precipitation.

When it does not snow in Jaffrey?

In Jaffrey snow does not fall in June through September.

Does it snow in Jaffrey in September?

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

How many hours of daylight does Jaffrey have in September?

In Jaffrey, New Hampshire, the average length of the day in September is 12.5h.

How long on average sun shines in September in Jaffrey?

The average sunshine in September in Jaffrey, New Hampshire, is 8h.

What is the UV index reading in September in Jaffrey?

In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Jaffrey, NH

Average temperature in September - Jaffrey, NH
  • Average high temperature in September: 69.8°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in September: 51.4°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 (16.2°F).

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Average pressure in September
Jaffrey, NH

Average pressure in September - Jaffrey, 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
Jaffrey, NH

Average wind speed in September - Jaffrey, NH
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in September
Jaffrey, NH

Average humidity in September - Jaffrey, 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 (74%).

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Average rainfall in September
Jaffrey, NH

Average rainfall in September - Jaffrey, NH
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is October (3.35").
The driest month (with the least rainfall) is September (2.17").

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Average rainfall days in September
Jaffrey, NH

Average rainfall days in September - Jaffrey, NH
  • Average rainfall days in September: 13 days

Months with the highest number of rainy days are May, June and August (15.8 days).
The month with the least rainy days is February (7.2 days).

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Average snowfall in September
Jaffrey, NH

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

The month with the highest snowfall is February (9.41").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Jaffrey, NH

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

The month with the highest number of snowfall days is February (12.5 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
Jaffrey, NH

Average daylight in September / Average sunshine in September - Jaffrey, 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: 9.1h).

  • Average sunshine in September: 8h

The month with the most sunshine is August (Average sunshine: 9.9h).
The month with the least sunshine is February (Average sunshine: 4.1h).

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Average sunshine days in September
Jaffrey, NH

Average sunshine days in September - Jaffrey, NH
  • Average sunshine days in September: 14.8 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is March (11.7 days).

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Average UV index in September
Jaffrey, NH

Average UV index in September - Jaffrey, NH
  • Average UV index in September: 3

The month with the highest UV index is July (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
Jaffrey, NH

Average cloud cover in September - Jaffrey, NH
  • Average cloud cover in September: 42

Months with the most cloud cover are February and March (Cloud cover 54).
Months with the least cloud cover are July and August (Cloud cover 38).

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Average visibility in September
Jaffrey, NH

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

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

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