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 is characterized by a mild reduction in the average high-temperature, from a very hot 96.3°F (35.7°C) in August to a hot 87.8°F (31°C). Throughout September, the temperature falls to an average low of 70.2°F (21.2°C).Heat index
For September, the heat index is estimated at a tropical 89.6°F (32°C). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.One should consider that heat index numbers are for shaded settings and light wind. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Humidity
September and December, with an average relative humidity of 49%, are the most humid months.Rainfall
In September, the rain falls for 10 days. Throughout September, 0.94" (24mm) of precipitation is accumulated. Throughout the year, there are 63.3 rainfall days, and 6.61" (168mm) of precipitation is accumulated.Snowfall
In Monahans, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 21min.On the first day of the month, sunrise is at 7:27 am and sunset at 8:14 pm. On the last day of September, sunrise is at 7:45 am and sunset at 7:37 pm CDT.
Sunshine
The average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What are the most humid months?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Monahans, TX
- Average high temperature in September: 87.8°F
The warmest month (with the highest average high temperature) is June (96.4°F).
The month with the lowest average high temperature is December (58.3°F).
- Average low temperature in September: 70.2°F
The month with the highest average low temperature is August (77°F).
The coldest month (with the lowest average low temperature) is January (39.4°F).
Average pressure in September
Monahans, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Monahans, TX
- Average wind speed in September: 10.6mph
The windiest month (with the highest average wind speed) is June (13.2mph).
The calmest month (with the lowest average wind speed) is December (8.9mph).
Average humidity in September
Monahans, TX
- Average humidity in September: 49%
The months with the highest relative humidity are September and December (49%).
The month with the lowest relative humidity is April (31%).
Average rainfall in September
Monahans, TX
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is February (0.08").
Average rainfall days in September
Monahans, TX
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is September (10 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Monahans, TX
- Average snowfall in September: 0"
The months with the highest snowfall are November and December (0.31").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Monahans, TX
- 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 April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Monahans, TX
- 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: 9h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Monahans, TX
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is January (27.8 days).
The month with the least sunshine days is September (18.1 days).
Average UV index in September
Monahans, TX
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Monahans, TX
- Average cloud cover in September: 20
The month with the most cloud cover is September (Cloud cover 20).
The month with the least cloud cover is June (Cloud cover 12).
Average visibility in September
Monahans, TX
- 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).
Monahans, Texas, USA
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