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 start of September comes with a reduction in the average high-temperature, receding from a torrid 95°F (35°C) in August to a moderately hot 85.8°F (29.9°C). Nighttime temperature lowers to an average of 67.1°F (19.5°C) in September.Heat index
The heat index for September is evaluated at a hot 91.4°F (33°C). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.Know that the heat index computations account for shaded terrains and slight winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical 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 essentially critical for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Humidity
In Rocky, the average relative humidity in September is 60%.Rainfall
In Rocky, during September, the rain falls for 11.3 days and regularly aggregates up to 2.01" (51mm) of precipitation. Throughout the year, there are 98.2 rainfall days, and 19.29" (490mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 7:09 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:21 pm CDT.
Sunshine
In Rocky, the average sunshine in September is 8.8h.UV index
In Rocky, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 5 in September interprets into the following advice:
Exercise prevention - Protecting skin and eyes from harm is required. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Rocky have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Rocky, OK
- Average high temperature in September: 85.8°F
The warmest month (with the highest average high temperature) is July (95.9°F).
The month with the lowest average high temperature is December (50.2°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (75°F).
The coldest month (with the lowest average low temperature) is January (32.2°F).
Average pressure in September
Rocky, OK
- Average pressure in September: 29.97"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
Rocky, OK
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is April (12.7mph).
The calmest month (with the lowest average wind speed) is August (9.1mph).
Average humidity in September
Rocky, OK
- Average humidity in September: 60%
The month with the highest relative humidity is May (63%).
The month with the lowest relative humidity is August (51%).
Average rainfall in September
Rocky, OK
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (0.75").
Average rainfall days in September
Rocky, OK
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in September
Rocky, OK
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Rocky, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rocky, OK
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- 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: 6h and 24min).
Average sunshine days in September
Rocky, OK
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is January (25.8 days).
The month with the least sunshine days is May (16.6 days).
Average UV index in September
Rocky, OK
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Rocky, OK
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 32).
The months with the least cloud cover are June and August (Cloud cover 18).
Average visibility in September
Rocky, OK
- 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).
Rocky, Oklahoma, USA
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