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 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
Harlingen experiences a minor change to a tropical 90.5°F in average high-temperature during September, closely reflecting August. Harlingen's average low-temperature for the month of September records at a warm 78.1°F.Heat index
Throughout September, the heat index is calculated to be a scorching 107.6°F. Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.Keep in mind the heat index values are meant for areas in shade and with light wind. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', is achieved by amalgamating air temperature with the relative humidity readings. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.
Humidity
The average relative humidity in September in Harlingen, Texas, is 69%.Rainfall
In Harlingen, during September, the rain falls for 11.5 days and regularly aggregates up to 0.63" of precipitation. In Harlingen, during the entire year, the rain falls for 79.8 days and collects up to 5.24" of precipitation.Snowfall
In Harlingen, snow does not fall in January, March through December.Daylight
In September, the average length of the day in Harlingen, Texas, is 12h and 18min.On the first day of September, sunrise is at 7:10 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:18 pm CDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 7 in September interprets into the following recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
FAQ
How hot does it get in Harlingen in September?
What is the average humidity in September in Harlingen?
How much does it rain in Harlingen in September?
When it does not snow in Harlingen?
How many hours of daylight does Harlingen have in September?
When are sunrise and sunset in September in Harlingen?
How many hours of sunshine does Harlingen have in September?
What is the UV index intensity in September in Harlingen?
Average temperature in September
Harlingen, TX
- Average high temperature in September: 90.5°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (68.7°F).
- Average low temperature in September: 78.1°F
The month with the highest average low temperature is August (80.1°F).
The coldest month (with the lowest average low temperature) is January (55.4°F).
Average pressure in September
Harlingen, TX
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Harlingen, TX
- Average wind speed in September: 8.9mph
The windiest months (with the highest average wind speed) are March and April (12.1mph).
The calmest month (with the lowest average wind speed) is September (8.9mph).
Average humidity in September
Harlingen, TX
- Average humidity in September: 69%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (65%).
Average rainfall in September
Harlingen, TX
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is July (0.87").
The driest month (with the least rainfall) is February (0.16").
Average rainfall days in September
Harlingen, TX
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is September (11.5 days).
The month with the least rainy days is February (4.7 days).
Average snowfall days in September
Harlingen, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Harlingen, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Harlingen, TX
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is March (23.3 days).
The month with the least sunshine days is September (15.6 days).
Average UV index in September
Harlingen, TX
- Average UV index in September: 7
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in September
Harlingen, TX
- Average cloud cover in September: 29
The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Harlingen, 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).
Harlingen, Texas, USA
Weather forecast for your location
2. Allow the app to use your location
