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 onset of September, Palo Alto experiences a modest temperature adjustment, with the average high-temperature gently receding from a fiery hot 95.9°F (35.5°C) in August to a hot 90.3°F (32.4°C). In the month of September, Palo Alto's average low-temperature falls to a moderately hot 76.3°F (24.6°C).Heat index
The heat index for September is calculated to be an extremely hot 107.6°F (42°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Heat index guidelines indicate values are for light wind scenarios and shaded regions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.
Humidity
In Palo Alto, the average relative humidity in September is 70%.Rainfall
The month with the most rainfall is September, when the rain falls for 14.6 days and typically aggregates up to 1.73" (44mm) of precipitation.Snowfall
In Palo Alto, snow does not fall in January, March through November.Daylight
The average length of the day in September in Palo Alto is 12h and 19min.On the first day of the month, sunrise is at 7:10 am and sunset at 7:51 pm. On the last day of September, in Palo Alto, sunrise is at 7:23 am and sunset at 7:18 pm CDT.
Sunshine
In Palo Alto, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 7 transforms into these recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Frequently asked questions
How hot is it in Palo Alto in September?
What is the average humidity in September in Palo Alto?
What is the rainiest month in Palo Alto?
How many days does it rain in September in Palo Alto?
When it does not snow in Palo Alto?
What is the average length of the day in September in Palo Alto?
When is the sunrise / sunset in September in Palo Alto?
How many hours of sunshine does Palo Alto have in September?
How high is the UV index in September in Palo Alto?
Average temperature in September
Palo Alto, TX
- Average high temperature in September: 90.3°F
The warmest month (with the highest average high temperature) is August (95.9°F).
The month with the lowest average high temperature is January (65.5°F).
- Average low temperature in September: 76.3°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 (50.5°F).
Average pressure in September
Palo Alto, TX
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Palo Alto, TX
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is May (11.1mph).
The calmest month (with the lowest average wind speed) is September (8.2mph).
Average humidity in September
Palo Alto, TX
- Average humidity in September: 70%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (65%).
Average rainfall in September
Palo Alto, TX
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is September (1.73").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in September
Palo Alto, TX
- Average rainfall days in September: 14.6 days
The month with the highest number of rainy days is September (14.6 days).
The month with the least rainy days is August (6.7 days).
Average snowfall in September
Palo Alto, TX
- Average snowfall in September: 0"
The months with the highest snowfall are February and December (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Palo Alto, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Palo Alto, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Palo Alto, TX
- Average sunshine days in September: 13 days
The month with the most sunshine days is August (22.9 days).
The month with the least sunshine days is September (13 days).
Average UV index in September
Palo Alto, TX
- Average UV index in September: 7
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Palo Alto, TX
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Palo Alto, 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).
Palo Alto, Texas, USA
Weather forecast for your location
2. Allow the app to use your location
