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
September marks a gentle change in average high-temperature, declining from August's tropical 91.9°F (33.3°C) to a warm 85.5°F (29.7°C). In the month of September, the temperature generally rests at an average low of 67.8°F (19.9°C).Heat index
The average heat index in September is evaluated at a hot 86°F (30°C). With sustained exposure and activity, exhaustion becomes probable, resulting in heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Humidity
In September, the average relative humidity is 42%.Rainfall
In September, the rain falls for 9.1 days. Throughout September, 0.94" (24mm) of precipitation is accumulated. In La Mesa, New Mexico, during the entire year, the rain falls for 62.9 days and collects up to 6.65" (169mm) of precipitation.Snowfall
In La Mesa, snow does not fall in March through October.Daylight
In September, the average length of the day in La Mesa is 12h and 21min.On the first day of September, sunrise is at 6:42 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:52 pm MDT.
Sunshine
The average sunshine in September is 11.2h.UV index
In La Mesa, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does La Mesa have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September in La Mesa?
Average temperature in September
La Mesa, NM
- Average high temperature in September: 85.5°F
The warmest month (with the highest average high temperature) is June (94.6°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in September: 67.8°F
The month with the highest average low temperature is July (74.7°F).
The coldest month (with the lowest average low temperature) is January (37.2°F).
Average pressure in September
La Mesa, NM
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
La Mesa, NM
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is January (6.3mph).
Average humidity in September
La Mesa, NM
- Average humidity in September: 42%
The month with the highest relative humidity is December (49%).
The months with the lowest relative humidity are April and May (22%).
Average rainfall in September
La Mesa, NM
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is July (1.38").
The driest month (with the least rainfall) is April (0.08").
Average rainfall days in September
La Mesa, NM
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is July (11.7 days).
The month with the least rainy days is April (2.3 days).
Average snowfall in September
La Mesa, NM
- Average snowfall in September: 0"
The months with the highest snowfall are February and December (0.63").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in September
La Mesa, NM
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (1 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
La Mesa, NM
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
La Mesa, NM
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is April (28.1 days).
The month with the least sunshine days is July (17.2 days).
Average UV index in September
La Mesa, NM
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in September
La Mesa, NM
- Average cloud cover in September: 16
The month with the most cloud cover is December (Cloud cover 19).
The months with the least cloud cover are May and June (Cloud cover 9).
Average visibility in September
La Mesa, NM
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
La Mesa, New Mexico, USA
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