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 beginning of September brings a minor change in the average high-temperature, shifting from a very hot 95.5°F (35.3°C) in August to a hot 87.1°F (30.6°C). In September, Mertzon experiences a temperature dip to an average of 69.3°F (20.7°C) at night.Heat index
In September, the average heat index is estimated at a hot 91.4°F (33°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humidity
The average relative humidity in September is 57%.Rainfall
In Mertzon, Texas, in September, it is raining for 10.5 days, with typically 1.69" (43mm) of accumulated precipitation. Throughout the year, there are 89.8 rainfall days, and 15.43" (392mm) of precipitation is accumulated.Snowfall
In Mertzon, snow does not fall in April through October.Daylight
In Mertzon, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:19 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 7:29 pm CDT.
Sunshine
In September, the average sunshine in Mertzon, Texas, is 8.9h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 during September translates into the following directions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Mertzon in September?
What is the average humidity in September in Mertzon?
How much does it rain in Mertzon in September?
When it does not snow in Mertzon?
How many hours of daylight does Mertzon have in September?
When are sunrise and sunset in September in Mertzon?
How long on average sun shines in September in Mertzon?
What is the UV index intensity in September in Mertzon?
Average temperature in September
Mertzon, TX
- Average high temperature in September: 87.1°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The months with the lowest average high temperature are January and December (58.6°F).
- Average low temperature in September: 69.3°F
The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).
Average pressure in September
Mertzon, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).
Average wind speed in September
Mertzon, TX
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is April (13.7mph).
The calmest month (with the lowest average wind speed) is September (9.6mph).
Average humidity in September
Mertzon, TX
- Average humidity in September: 57%
The month with the highest relative humidity is November (58%).
The month with the lowest relative humidity is August (47%).
Average rainfall in September
Mertzon, TX
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is October (2.36").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Mertzon, TX
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (12 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in September
Mertzon, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Mertzon, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.1 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
Mertzon, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Mertzon, TX
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is January (25.8 days).
The month with the least sunshine days is May (16.3 days).
Average UV index in September
Mertzon, 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
Mertzon, TX
- Average cloud cover in September: 27
The month with the most cloud cover is March (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Mertzon, 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).
Mertzon, Texas, USA
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