September weather forecastHolliday, TX
September
Weather in September
September, the first month of the autumn in Holliday, is still a tropical month, with an average temperature fluctuating between 68.9°F (20.5°C) and 87.8°F (31°C).Temperature
The shift from August to September involves a decrease in the average high-temperature, dropping from a fiery hot 97.3°F (36.3°C) to a tropical 87.8°F (31°C). During the month of September, an average temperature of 68.9°F (20.5°C) is noted during the nights.Heat index
For September, the heat index is estimated at a very hot 95°F (35°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.Heat index readings emphasize conditions of light breezes and shaded spots. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.
Humidity
The average relative humidity in September is 59%.Rainfall
In Holliday, during September, the rain falls for 12.2 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, there are 102 rainfall days, and 19.09" (485mm) of precipitation is accumulated.Snowfall
In Holliday, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 7:09 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:19 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In Holliday, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, a regular UV index of 6 translates into these guidelines:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Holliday, TX
- Average high temperature in September: 87.8°F
The warmest month (with the highest average high temperature) is August (97.3°F).
The month with the lowest average high temperature is December (54°F).
- Average low temperature in September: 68.9°F
The months with the highest average low temperature are July and August (76.1°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in September
Holliday, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Holliday, TX
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is September (8.3mph).
Average humidity in September
Holliday, TX
- Average humidity in September: 59%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Holliday, TX
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in September
Holliday, TX
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in September
Holliday, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Holliday, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Holliday, TX
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 36min
The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in September
Holliday, TX
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is January (25.6 days).
The month with the least sunshine days is May (15.5 days).
Average UV index in September
Holliday, 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 2).
Average cloud cover in September
Holliday, TX
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 31).
The months with the least cloud cover are June and August (Cloud cover 18).
Average visibility in September
Holliday, 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).
