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
Grandfalls's transition into September involves a gentle shift in temperature, receding from a torrid 96.3°F (35.7°C) in August to a hot 87.8°F (31°C). In Grandfalls, an average nighttime temperature of 70.2°F (21.2°C) is expected during September.Heat index
September's average heat index is estimated at a hot 89.6°F (32°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Factoring in the heat index, values are geared towards shaded areas with light breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. 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.
Humidity
September and December, with an average relative humidity of 49%, are the most humid months in Grandfalls, Texas.Rainfall
In Grandfalls, in September, during 10 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. In Grandfalls, during the entire year, the rain falls for 63.3 days and collects up to 6.61" (168mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:27 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 7:37 pm CDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In Grandfalls, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 6 during September leads to these advisories:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
Is it hot in Grandfalls during September?
What is the most humid month in Grandfalls?
What is the average humidity in September in Grandfalls?
How many days does it rain in September in Grandfalls?
When it does not snow in Grandfalls?
What is the average length of the day in September in Grandfalls?
When are sunrise and sunset in September in Grandfalls?
How many hours of sunshine does Grandfalls have in September?
What is the UV index intensity in September in Grandfalls?
Average temperature in September
Grandfalls, TX
- Average high temperature in September: 87.8°F
The warmest month (with the highest average high temperature) is June (96.4°F).
The month with the lowest average high temperature is December (58.3°F).
- Average low temperature in September: 70.2°F
The month with the highest average low temperature is August (77°F).
The coldest month (with the lowest average low temperature) is January (39.4°F).
Average pressure in September
Grandfalls, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Grandfalls, TX
- Average wind speed in September: 10.6mph
The windiest month (with the highest average wind speed) is June (13.2mph).
The calmest month (with the lowest average wind speed) is December (8.9mph).
Average humidity in September
Grandfalls, TX
- Average humidity in September: 49%
The months with the highest relative humidity are September and December (49%).
The month with the lowest relative humidity is April (31%).
Average rainfall in September
Grandfalls, TX
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is February (0.08").
Average rainfall days in September
Grandfalls, TX
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is September (10 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Grandfalls, TX
- Average snowfall in September: 0"
The months with the highest snowfall are November and December (0.31").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Grandfalls, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Grandfalls, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Grandfalls, TX
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is January (27.8 days).
The month with the least sunshine days is September (18.1 days).
Average UV index in September
Grandfalls, TX
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Grandfalls, TX
- Average cloud cover in September: 20
The month with the most cloud cover is September (Cloud cover 20).
The month with the least cloud cover is June (Cloud cover 12).
Average visibility in September
Grandfalls, 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).
Grandfalls, Texas, USA
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