Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The start of September comes with a small reduction in the average high-temperature, subtly receding from a moderately hot 74.8°F (23.8°C) in August to a pleasant 68.5°F (20.3°C). September nights report a substantial dip from daytime highs to an average of 43.7°F (6.5°C).Humidity
In Costilla, the average relative humidity in September is 51%.Rainfall
In Costilla, in September, it is raining for 7.1 days, with typically 0.59" (15mm) of accumulated precipitation. In Costilla, during the entire year, the rain falls for 72.2 days and collects up to 8.82" (224mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows in Costilla. 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 Costilla, the average length of the day in September 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, sunrise is at 6:57 am and sunset at 6:46 pm MDT.
Sunshine
The average sunshine in September is 11h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September in Costilla?
How many days does it rain in September?
When does it start to snow?
How many hours of daylight does Costilla have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Costilla have in September?
What is the UV index reading in September?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Costilla, New Mexico, USA
Weather forecast for your location
2. Allow the app to use your location