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
A decrease in the average high-temperature is observed during September, shifting from a very hot 97.2°F (36.2°C) in August to a hot 87.6°F (30.9°C). In Rochester, the average nighttime temperature during September is an agreeable 68.9°F (20.5°C).Heat index
The heat index value for September is calculated to be a hot 93.2°F (34°C). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
September through December, with an average relative humidity of 56%, are the most humid months in Rochester.Rainfall
In Rochester, in September, during 11.5 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, there are 96.8 rainfall days, and 16.42" (417mm) of precipitation is accumulated.Snowfall
In Rochester, Texas, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:14 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:24 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In Rochester, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a regular UV index of 6 translates into these guidelines:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the most humid month?
What is the average humidity in September?
How many days does it rain in September in Rochester?
When it does not snow?
How many hours of daylight does Rochester have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September in Rochester?
What is the UV index intensity in September?
Average temperature in September
Rochester, TX
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (97.2°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in September: 68.9°F
The months with the highest average low temperature are July and August (76.6°F).
The coldest month (with the lowest average low temperature) is January (37°F).
Average pressure in September
Rochester, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Rochester, TX
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is April (13.2mph).
The calmest month (with the lowest average wind speed) is September (9.4mph).
Average humidity in September
Rochester, TX
- Average humidity in September: 56%
The months with the highest relative humidity are September, October, November and December (56%).
The month with the lowest relative humidity is August (45%).
Average rainfall in September
Rochester, TX
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is February (0.63").
Average rainfall days in September
Rochester, TX
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in September
Rochester, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Rochester, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Rochester, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).
Average sunshine days in September
Rochester, TX
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is January (25.9 days).
The month with the least sunshine days is May (15.8 days).
Average UV index in September
Rochester, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Rochester, TX
- Average cloud cover in September: 25
The month with the most cloud cover is March (Cloud cover 26).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Rochester, 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).
Rochester, Texas, USA
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