September weather forecast
Costilla, NM

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Weather in September

September, the first month of the autumn in Costilla, is still a pleasant month, with an average temperature ranging between min 43.7°F (6.5°C) and max 68.5°F (20.3°C).

Temperature

Costilla's transition into September involves a gentle shift in temperature, receding from a warm 74.8°F (23.8°C) in August to an agreeable 68.5°F (20.3°C). Despite soaring daytime temperatures, Costilla registers a consistent average low-temperature of 43.7°F (6.5°C) in September.

Humidity

In September, the average relative humidity is 51%.

Rainfall

In Costilla, in September, it is raining for 7.1 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, there are 72.2 rainfall days, and 8.82" (224mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.2" (5mm) of snow. In Costilla, during the entire year, snow falls for 57.6 days and aggregates up to 28.58" (726mm) of snow.

Daylight

In September, the average length of the day in Costilla is 12h and 24min.
On the first day of the month, sunrise is at 6:33 am and sunset at 7:30 pm. On the last day of September, in Costilla, sunrise is at 6:57 am and sunset at 6:46 pm MDT.

Sunshine

The average sunshine in September in Costilla is 11h.

UV index

In Costilla, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 4 transforms into these recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
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Frequently asked questions

What is the usual temperature for Costilla in September?

Costilla in September has an average high-temperature of 68.5°F (20.3°C) and an average low-temperature of 43.7°F (6.5°C).

What is the average humidity in September in Costilla?

The average relative humidity in September in Costilla, New Mexico, is 51%.

How many days does it rain in September in Costilla?

In Costilla, New Mexico, in September, during 7.1 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

When does it start to snow in Costilla?

September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.2" (5mm) of snow.

How many hours of daylight does Costilla have in September?

In September, the average day length in Costilla is 12h and 24min.

What time are sunrise and sunset in September in Costilla?

On the first day of September, sunrise is at 6:33 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:46 pm MDT.

How long on average sun shines in September in Costilla?

In Costilla, New Mexico, the average sunshine duration in September is 11h.

What is the UV index reading in September in Costilla?

In Costilla, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to 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
Costilla, NM

Average temperature in September - Costilla, NM
  • Average high temperature in September: 68.5°F

The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in September: 43.7°F

The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).

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Average pressure in September
Costilla, NM

Average pressure in September - Costilla, NM
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is April (29.89"Hg).

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Average wind speed in September
Costilla, NM

Average wind speed in September - Costilla, NM
  • Average wind speed in September: 6.5mph

The windiest months (with the highest average wind speed) are April and May (8.9mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).

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Average humidity in September
Costilla, NM

Average humidity in September - Costilla, NM
  • Average humidity in September: 51%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is June (38%).

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Average rainfall in September
Costilla, NM

Average rainfall in September - Costilla, NM
  • Average rainfall in September: 0.59"

The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is November (0.43").

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Average rainfall days in September
Costilla, NM

Average rainfall days in September - Costilla, NM
  • Average rainfall days in September: 7.1 days

The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is November (1.3 days).

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Average snowfall in September
Costilla, NM

Average snowfall in September - Costilla, NM
  • Average snowfall in September: 0.2"

The month with the highest snowfall is March (5.55").
The months with the least snowfall are July and August (0").

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Average snowfall days in September
Costilla, NM

Average snowfall days in September - Costilla, NM
  • Average snowfall days in September: 0.4 days

The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in September /
Average sunshine in September
Costilla, NM

Average daylight in September / Average sunshine in September - Costilla, NM
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 11h and 0min

The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 6h and 30min).

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Average sunshine days in September
Costilla, NM

Average sunshine days in September - Costilla, NM
  • Average sunshine days in September: 20.5 days

The month with the most sunshine days is October (24.1 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in September
Costilla, NM

Average UV index in September - Costilla, NM
  • Average UV index in September: 4

The months with the highest UV index are June, July and August (UV index 5).
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
Costilla, NM

Average cloud cover in September - Costilla, NM
  • Average cloud cover in September: 15

The month with the most cloud cover is January (Cloud cover 31).
The months with the least cloud cover are June and October (Cloud cover 14).

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Average visibility in September
Costilla, NM

Average visibility in September - Costilla, NM
  • Average visibility in September: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

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Costilla, New Mexico, USA

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