September weather forecast and climate
Fort Sumner, NM

Weather in September

September, the first month of the autumn, in Fort Sumner, is also a moderately hot month, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 60.8°F (16°C).

Temperature

In Fort Sumner, the average high-temperature slightly decreases, from a tropical 88.9°F (31.6°C) in August, to a moderately hot 81.3°F (27.4°C). In September, the average low-temperature is 60.8°F (16°C).

Heat index

In September, the average heat index is estimated at 81.9°F (27.7°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, wind, pregnancy), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In September, the average relative humidity is 48%.

Rainfall

In Fort Sumner, during September, the rain falls for 9.2 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, in Fort Sumner, there are 78.6 rainfall days, and 9.06" (230mm) of precipitation is accumulated.

Snowfall

In Fort Sumner, New Mexico, snow does not fall in May through September.

Daylight

The average length of the day in Fort Sumner is 12.4h.

Sunshine

In September, the average sunshine is 10.8h.

UV index

In Fort Sumner, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Fort Sumner?

In Fort Sumner, New Mexico, in September, the average high-temperature is 81.3°F (27.4°C), and the average low-temperature is 60.8°F (16°C). The average heat index (a.k.a. 'feels like', 'real feel'), that takes the relative humidity and factores it into the air temperature reading, in September is calculated to 81.9°F (27.7°C).

What is the average humidity in September in Fort Sumner?

In September, the average relative humidity in Fort Sumner, New Mexico, is 48%.

How many days does it rain in September in Fort Sumner?

In Fort Sumner, New Mexico, in September, during 9.2 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.

Does it snow in Fort Sumner in September?

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

When it does not snow in Fort Sumner?

May through September are months without snowfall in Fort Sumner, New Mexico.

How many hours of daylight does Fort Sumner have in September?

The average length of the day in September in Fort Sumner is 12.4h.

How long on average sun shines in September in Fort Sumner?

In September, the average sunshine in Fort Sumner is 10.8h.

What is the UV index intensity in September in Fort Sumner?

The average daily maximum UV index in September in Fort Sumner is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in September
Fort Sumner, NM

Average temperature in September - Fort Sumner, NM
  • Average high temperature in September: 81.3°F

The warmest months (with the highest average high temperature) are June and July (90°F).
The month with the lowest average high temperature is December (49.3°F).

  • Average low temperature in September: 60.8°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in September
Fort Sumner, NM

Average pressure in September - Fort Sumner, NM
  • Average pressure in September: 29.99"

The month with the highest atmospheric pressure is January (30.12").
The month with the lowest atmospheric pressure is April (29.86").

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Average wind speed in September
Fort Sumner, NM

Average wind speed in September - Fort Sumner, NM
  • Average wind speed in September: 10.1mph

The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (9mph).

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Average humidity in September
Fort Sumner, NM

Average humidity in September - Fort Sumner, NM
  • Average humidity in September: 48%

The month with the highest relative humidity is December (52%).
The month with the lowest relative humidity is April (31%).

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Average rainfall in September
Fort Sumner, NM

Average rainfall in September - Fort Sumner, NM
  • Average rainfall in September: 1.06"

The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is January (0.35").

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Average rainfall days in September
Fort Sumner, NM

Average rainfall days in September - Fort Sumner, NM
  • Average rainfall days in September: 9.2 days

The month with the highest number of rainy days is July (12.5 days).
The month with the least rainy days is November (2.4 days).

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Average snowfall in September
Fort Sumner, NM

Average snowfall in September - Fort Sumner, NM
  • Average snowfall in September: 0"

The month with the highest snowfall is November (1.85").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Fort Sumner, NM

Average snowfall days in September - Fort Sumner, NM
  • Average snowfall days in September: 0 days

Months with the highest number of snowfall days are January and December (3.5 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Fort Sumner, NM

Average daylight in September / Average sunshine in September - Fort Sumner, NM
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 10.8h

The month with the most sunshine is June (Average sunshine: 11.9h).
Months with the least sunshine are January and December (Average sunshine: 7.1).

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Average sunshine days in September
Fort Sumner, NM

Average sunshine days in September - Fort Sumner, NM
  • Average sunshine days in September: 17.9 days

The month with the most sunshine days is November (25.5 days).
The month with the least sunshine days is July (14 days).

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Average UV index in September
Fort Sumner, NM

Average UV index in September - Fort Sumner, NM
  • Average UV index in September: 5

The month with the highest UV index is June (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in September
Fort Sumner, NM

Average cloud cover in September - Fort Sumner, NM
  • Average cloud cover in September: 16

The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 12).

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Average visibility in September
Fort Sumner, NM

Average visibility in September - Fort Sumner, NM
  • Average visibility in September: 6mi

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

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