September weather forecastCastle, OK
September
Weather in September
The first month of the autumn, September, is still a warm month in Castle, Oklahoma, with an average temperature varying between 64.4°F (18°C) and 84.2°F (29°C).Temperature
September witnesses a gentle descent in average high-temperature, descending from August's tropical 91.8°F (33.2°C) to a warm 84.2°F (29°C). Castle in September experiences a low-temperature average of 64.4°F (18°C).Heat index
For September, the heat index is appraised at a tropical 91.4°F (33°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humidity
In Castle, the average relative humidity in September is 69%.Rainfall
In Castle, in September, it is raining for 12.8 days, with typically 2.72" (69mm) of accumulated precipitation. In Castle, during the entire year, the rain falls for 129.9 days and collects up to 29.06" (738mm) of precipitation.Snowfall
January through April, September, November and December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 7.4 snowfall days, and 3.9" (99mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:58 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:10 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Castle, OK
- Average high temperature in September: 84.2°F
The warmest months (with the highest average high temperature) are July and August (91.8°F).
The month with the lowest average high temperature is January (47.8°F).
- Average low temperature in September: 64.4°F
The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (32°F).
Average pressure in September
Castle, OK
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Castle, OK
- Average wind speed in September: 7.6mph
The windiest months (with the highest average wind speed) are March and April (11mph).
The calmest months (with the lowest average wind speed) are July and August (7.4mph).
Average humidity in September
Castle, OK
- Average humidity in September: 69%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is August (65%).
Average rainfall in September
Castle, OK
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is May (4.72").
The driest months (with the least rainfall) are February and November (1.38").
Average rainfall days in September
Castle, OK
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Castle, OK
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in September
Castle, OK
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Castle, OK
- Average daylight in September: 12h and 24min
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 42min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Castle, OK
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is January (22.4 days).
The month with the least sunshine days is May (13.2 days).
Average UV index in September
Castle, 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
Castle, OK
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Castle, 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).
