September weather forecastWaller, TX
September
Weather in September
The first month of the autumn, September, is also a hot month in Waller, Texas, with an average temperature varying between 88.7°F (31.5°C) and 70.7°F (21.5°C).Temperature
A modest decline in the average high-temperature is seen during September, decreasing from 94.6°F (34.8°C) in August to a still hot 88.7°F (31.5°C). In Waller, in September, the average low-temperature is an agreeable 70.7°F (21.5°C).Heat index
For September, the heat index is evaluated at a blistering 105.8°F (41°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.Take note of the fact that heat index values are based on shaded circumstances with light airflows. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.
Humidity
In September, the average relative humidity in Waller is 75%.Rainfall
In Waller, during September, the rain falls for 16.6 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, in Waller, there are 133.7 rainfall days, and 14.69" (373mm) of precipitation is accumulated.Snowfall
In Waller, Texas, snow does not fall in February through November.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:01 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:09 pm CDT.
Sunshine
In Waller, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September in Waller, Texas, is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 6 in September interprets into the following advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Waller, TX
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is August (94.6°F).
The month with the lowest average high temperature is January (59.7°F).
- Average low temperature in September: 70.7°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).
Average pressure in September
Waller, 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 (29.93"Hg).
Average wind speed in September
Waller, TX
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is September (5.5mph).
Average humidity in September
Waller, TX
- Average humidity in September: 75%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Waller, TX
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is April (0.75").
Average rainfall days in September
Waller, TX
- Average rainfall days in September: 16.6 days
The month with the highest number of rainy days is September (16.6 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Waller, TX
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Waller, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.4 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
Waller, TX
- Average daylight in September: 12h and 18min
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 30min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Waller, TX
- Average sunshine days in September: 11.7 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is September (11.7 days).
Average UV index in September
Waller, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Waller, TX
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Waller, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, August, September, October, November and December (6mi).
The months with the lowest visibility are March, April, May, June and July (5mi).
