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 start of September marks an average high-temperature of a still tropical 87.6°F (30.9°C), hardly distinguishable from the conditions in August. Pasadena in September anticipates an average nighttime temperature of 73.9°F (23.3°C).Heat index
September's heat index is estimated at a very hot 102.2°F (39°C). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.Evaluating the heat index requires understanding its values in the shade and with gentle winds. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
In Pasadena, the average relative humidity in September is 75%.Rainfall
The month with the most rainfall in Pasadena is September, when the rain falls for 21.3 days and typically aggregates up to 5.94" (151mm) of precipitation.Snowfall
In Pasadena, snow does not fall in February through November.Daylight
The average length of the day in September in Pasadena is 12h and 20min.On the first day of September, sunrise is at 6:58 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:07 pm CDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
In September, the average daily maximum UV index in Pasadena is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
How hot does it get in Pasadena in September?
What is the average humidity in September in Pasadena?
What is the rainiest month in Pasadena?
How much does it rain in Pasadena in September?
When it does not snow in Pasadena?
How many hours of daylight does Pasadena have in September?
What time are sunrise and sunset in September in Pasadena?
How long on average sun shines in September in Pasadena?
What is the UV index reading in September in Pasadena?
Average temperature in September
Pasadena, TX
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (92.8°F).
The month with the lowest average high temperature is January (60.6°F).
- Average low temperature in September: 73.9°F
The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in September
Pasadena, 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
Pasadena, TX
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest months (with the lowest average wind speed) are August and September (6.5mph).
Average humidity in September
Pasadena, TX
- Average humidity in September: 75%
The month with the highest relative humidity is February (79%).
The months with the lowest relative humidity are August and October (71%).
Average rainfall in September
Pasadena, TX
- Average rainfall in September: 5.94"
The wettest month (with the highest rainfall) is September (5.94").
The driest month (with the least rainfall) is February (1.89").
Average rainfall days in September
Pasadena, TX
- Average rainfall days in September: 21.3 days
The months with the highest number of rainy days are August and September (21.3 days).
The month with the least rainy days is January (12.3 days).
Average snowfall in September
Pasadena, TX
- Average snowfall in September: 0"
The months with the highest snowfall are January and December (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Pasadena, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 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
Pasadena, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Pasadena, TX
- Average sunshine days in September: 6.9 days
The month with the most sunshine days is January (16.4 days).
The months with the least sunshine days are August and September (6.9 days).
Average UV index in September
Pasadena, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Pasadena, TX
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 27).
Average visibility in September
Pasadena, 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).
Pasadena, Texas, USA
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