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 days in September
- Average sea temperature 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
As Kemah welcomes September, the average high-temperature stabilizes at a still hot 86.2°F (30.1°C), showing little deviation from August's 90.5°F (32.5°C). In September, the average low-temperature is a warm 75.7°F (24.3°C).Heat index
Throughout September, the heat index is calculated to be a sweltering 98.6°F (37°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.Evaluating the heat index requires understanding its values in the shade and with gentle winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When body heat isn't effectively managed, risks of dehydration and overheating amplify.
Humidity
The average relative humidity in September is 75%.Rainfall
The month with the most rainfall in Kemah is September, when the rain falls for 15.9 days and typically aggregates up to 1.5" (38mm) of precipitation.Snowfall
Months with snowfall are January, September and December. The months with the most snowfall days in Kemah are January, September and December, with an average of 0.1 snowfall days.Ocean temperature
In Kemah, in September, the average water temperature is 83.5°F (28.6°C).Note: Water activities including swimming and diving at temperatures from 77°F (25°C) to 84.2°F (29°C) are deemed very pleasurable and enjoyable for extended periods, devoid of discomfort.
Daylight
In Kemah, the average length of the day in September is 12h and 20min.On the first day of September in Kemah, sunrise is at 6:57 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:06 pm CDT.
Sunshine
In September, the average sunshine in Kemah is 8.6h.UV index
In Kemah, Texas, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Enhance your sun protection with tightly woven, yet airy clothing. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
How hot does it get in Kemah in September?
What is the average humidity in September in Kemah?
What is the rainiest month in Kemah?
How much does it rain in Kemah in September?
When does it snow the most in Kemah?
When does it start to snow in Kemah?
How warm is the water in September in Kemah?
What is the average length of the day in September in Kemah?
When are sunrise and sunset in September in Kemah?
How long on average sun shines in September in Kemah?
What is the UV index reading in September in Kemah?
Average temperature in September
Kemah, TX
- Average high temperature in September: 86.2°F
The warmest month (with the highest average high temperature) is August (90.5°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in September: 75.7°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (48.6°F).
Average pressure in September
Kemah, 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
Kemah, TX
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (7.6mph).
Average humidity in September
Kemah, TX
- Average humidity in September: 75%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Kemah, TX
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is September (1.5").
The driest months (with the least rainfall) are February and March (0.31").
Average rainfall days in September
Kemah, TX
- Average rainfall days in September: 15.9 days
The month with the highest number of rainy days is September (15.9 days).
The month with the least rainy days is February (6.3 days).
Average snowfall days in September
Kemah, TX
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January, September and December (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, October and November (0 days).
Average sea temperature in September
Kemah, TX
- Average sea temperature in September: 83.5°F
The best month for swimming (with the highest average sea temperature) is August (87.2°F).
The coldest month (with the lowest average sea temperature) is January (56.8°F).
Average daylight in September /
Average sunshine in September
Kemah, 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 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Kemah, TX
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is September (10.3 days).
Average UV index in September
Kemah, 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
Kemah, TX
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Kemah, 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).
Kemah, Texas, USA
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