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 arrival of September, Mount Calm experiences a modest decline in average high-temperatures, transitioning from a fiery hot 95.5°F (35.3°C) in August to a tropical 88.3°F (31.3°C). Mount Calm witnesses an average low-temperature of 70.2°F (21.2°C) throughout the month of September.Heat index
For September, the heat index is computed to be a very hot 98.6°F (37°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.The metrics for the heat index are tailored for both shady environments and light winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
In September, the average relative humidity in Mount Calm is 66%.Rainfall
In Mount Calm, in September, during 14.9 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. Throughout the year, there are 140.8 rainfall days, and 30.39" (772mm) of precipitation is accumulated.Snowfall
In Mount Calm, snow does not fall in March through December.Daylight
The average length of the day in September is 12h and 21min.On the first day of September in Mount Calm, sunrise is at 7:03 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:13 pm CDT.
Sunshine
In Mount Calm, Texas, the average sunshine in September is 8.5h.UV index
In Mount Calm, Texas, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 6 in September leads to these recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Mount Calm during September?
What is the average humidity in September in Mount Calm?
How many days does it rain in September in Mount Calm?
When it does not snow in Mount Calm?
How many hours of daylight does Mount Calm have in September?
When are sunrise and sunset in September in Mount Calm?
How long on average sun shines in September in Mount Calm?
What is the UV index intensity in September in Mount Calm?
Average temperature in September
Mount Calm, TX
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (56.1°F).
- Average low temperature in September: 70.2°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (40.1°F).
Average pressure in September
Mount Calm, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Mount Calm, TX
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is September (6.7mph).
Average humidity in September
Mount Calm, TX
- Average humidity in September: 66%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (58%).
Average rainfall in September
Mount Calm, TX
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is October (4.25").
The driest months (with the least rainfall) are July and November (1.73").
Average rainfall days in September
Mount Calm, TX
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in September
Mount Calm, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.67").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Mount Calm, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Mount Calm, 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: 8h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Mount Calm, TX
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is January (22 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in September
Mount Calm, 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 and December (UV index 3).
Average cloud cover in September
Mount Calm, TX
- Average cloud cover in September: 30
The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Mount Calm, 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).
Mount Calm, Texas, USA
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