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 arrival of September corresponds with a minor reduction in the average high-temperature, down from August's hot 92.8°F (33.8°C) to a warm 85.3°F (29.6°C). Harper observes an average low-temperature of 67.1°F (19.5°C) during September nights.Heat index
September's average heat index is computed to be a tropical 93.2°F (34°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly relevant to children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Humidity
The average relative humidity in September is 68%.Rainfall
In Harper, in September, it is raining for 14.6 days, with typically 2.05" (52mm) of accumulated precipitation. Throughout the year, in Harper, there are 135.4 rainfall days, and 18.27" (464mm) of precipitation is accumulated.Snowfall
In Harper, snow does not fall in March through October.Daylight
The average length of the day in September in Harper is 12h and 20min.On the first day of the month, sunrise is at 7:14 am and sunset at 7:59 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:23 pm CDT.
Sunshine
In September, the average sunshine in Harper is 8.4h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Harper?
What is the average humidity in September in Harper?
How much does it rain in Harper in September?
When it does not snow in Harper?
How many hours of daylight does Harper have in September?
When are sunrise and sunset in September in Harper?
How long on average sun shines in September in Harper?
What is the UV index reading in September in Harper?
Average temperature in September
Harper, TX
- Average high temperature in September: 85.3°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 (58.6°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is August (71.6°F).
The coldest month (with the lowest average low temperature) is January (40.6°F).
Average pressure in September
Harper, TX
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Harper, TX
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is September (7.5mph).
Average humidity in September
Harper, TX
- Average humidity in September: 68%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Harper, TX
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is November (0.87").
Average rainfall days in September
Harper, TX
- Average rainfall days in September: 14.6 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Harper, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.16").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in September
Harper, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.7 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Harper, TX
- Average daylight in September: 12h and 2min
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 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are November and December (Average sunshine: 5h and 48min).
Average sunshine days in September
Harper, TX
- Average sunshine days in September: 12.2 days
The month with the most sunshine days is January (21.2 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in September
Harper, TX
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Harper, TX
- Average cloud cover in September: 35
The month with the most cloud cover is May (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Harper, 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).
Harper, Texas, USA
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