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
With the arrival of September, Helotes notices a mild change in the average high-temperature, sliding from August's very hot 95°F (35°C) to a hot 88.2°F (31.2°C). Helotes witnesses an average low-temperature of 70.5°F (21.4°C) throughout the month of September.Heat index
For September, the heat index is evaluated at a torrid 98.6°F (37°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.Heat index data is primarily for areas with shade and subjected to light winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', comes about by integrating the temperature readings with the humidity levels. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. 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 particularly important for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.
Humidity
In September, the average relative humidity is 67%.Rainfall
In Helotes, in September, during 16.4 rainfall days, 3.46" (88mm) of precipitation is typically accumulated. Throughout the year, there are 140.3 rainfall days, and 23.15" (588mm) of precipitation is accumulated.Snowfall
In Helotes, snow does not fall in March through December.Daylight
The average length of the day in September in Helotes is 12h and 20min.On the first day of the month, sunrise is at 7:12 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:27 am and sunset at 7:21 pm CDT.
Sunshine
In September, the average sunshine in Helotes is 8.5h.UV index
In Helotes, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Frequently asked questions
How hot is September in Helotes?
What is the average humidity in September in Helotes?
How many days does it rain in September in Helotes?
When it does not snow in Helotes?
What is the average length of the day in September in Helotes?
What time are sunrise and sunset in September in Helotes?
How long on average sun shines in September in Helotes?
What is the UV index intensity in September in Helotes?
Average temperature in September
Helotes, TX
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in September: 70.5°F
The month with the highest average low temperature is August (74.5°F).
The coldest month (with the lowest average low temperature) is January (43.2°F).
Average pressure in September
Helotes, TX
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Helotes, TX
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is September (6.5mph).
Average humidity in September
Helotes, TX
- Average humidity in September: 67%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Helotes, TX
- Average rainfall in September: 3.46"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in September
Helotes, TX
- Average rainfall days in September: 16.4 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Helotes, TX
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Helotes, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Helotes, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are November and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Helotes, TX
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is September (11.2 days).
Average UV index in September
Helotes, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Helotes, TX
- Average cloud cover in September: 34
The months with the most cloud cover are March and May (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Helotes, 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).
Helotes, Texas, USA
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