September weather forecast and climate
South Effingham, NH

September, the first month of the autumn, in South Effingham, is still a pleasant month, with average temperature ranging between min 50.2°F (10.1°C) and max 69.8°F (21°C).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 77.2°F (25.1°C) in August, to an agreeable 69.8°F (21°C). In South Effingham, in September, the average low-temperature is 50.2°F (10.1°C).

Humidity

In September, the average relative humidity is 80%.

Rainfall

The month with the least rainfall in South Effingham is September when the rain falls for 10.9 days and typically collects 1.54" (39mm) of precipitation.

Snowfall

In South Effingham snow does not fall in June through September.

Daylight

The average length of the day in South Effingham is 12.5h.

Sunshine

The average sunshine in South Effingham is 8.2h.

UV index

In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in South Effingham?

The average high-temperature, in September, in South Effingham, is 69.8°F (21°C), while the average low-temperature is 50.2°F (10.1°C).

What is the average humidity in September in South Effingham?

In September, the average relative humidity is 80%.

How many days does it rain in September in South Effingham?

In South Effingham, in September, it is raining for 10.9 days, with typically 1.54" (39mm) of accumulated precipitation.

What is the driest month in South Effingham?

The month with the least rainfall is September when the rain falls for 10.9 days and typically collects 1.54" (39mm) of precipitation.

Does it snow in South Effingham in September?

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

When it does not snow in South Effingham?

In South Effingham snow does not fall in June through September.

How many hours of daylight does South Effingham have in September?

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

How many hours of sunshine does South Effingham have in September?

In South Effingham, New Hampshire, the average sunshine in September is 8.2h.

What is the UV index intensity in September in South Effingham?

In South Effingham, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - South Effingham, NH
  • Average high temperature in September: 21°C

The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-2.4°C).

  • Average low temperature in September: 10.1°C

The month with the highest average low temperature is July (14.4°C).
The coldest month (with the lowest average low temperature) is January (-10.1°C).

Average pressure in September - South Effingham, NH
  • Average pressure in September: 1017.6mbar

The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1013mbar).

Average wind speed in September - South Effingham, NH
  • Average wind speed in September: 8.3km/h

The windiest month (with the highest average wind speed) is January (12.2km/h).
The calmest months (with the lowest average wind speed) are July and August (7.8km/h).

Average humidity in September - South Effingham, NH
  • Average humidity in September: 80%

Months with the highest relative humidity are January and February (85%).
Months with the lowest relative humidity are April and November (77%).

Average rainfall in September - South Effingham, NH
  • Average rainfall in September: 39mm

The wettest month (with the highest rainfall) is October (84mm).
The driest month (with the least rainfall) is September (39mm).

Average rainfall days in September - South Effingham, NH
  • Average rainfall days in September: 10.9 days

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (5.5 days).

Average snowfall in September - South Effingham, NH
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (247mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September - South Effingham, NH
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (11.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

The month with the longest days is June (Average daylight: 15.4h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in September: 8.2h

The month with the most sunshine is August (Average sunshine: 10h).
The month with the least sunshine is February (Average sunshine: 4.5h).

Average sunshine days in September - South Effingham, NH
  • Average sunshine days in September: 17.2 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is April (13.2 days).

Average UV index in September - South Effingham, NH
  • Average UV index in September: 3

Months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 1).

Average cloud cover in September - South Effingham, 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 36).

Average visibility in September - South Effingham, NH
  • Average visibility in September: 8km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (8km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (8km).