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
September sees a slight reduction in average high-temperature, with a shift from a tropical 92.3°F (33.5°C) in August to a warm 85.1°F (29.5°C). Marked by a significant drop from the daytime highs, Williams's average low-temperature in September stands at a refreshing 63°F (17.2°C).Heat index
September's mean heat index is computed to be a hot 93.2°F (34°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.Consider that heat index readings are for situations in the shade and light wind. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Humidity
The average relative humidity in September in Williams is 70%.Rainfall
In Williams, during September, the rain falls for 12.3 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Williams, during the entire year, the rain falls for 149.7 days and collects up to 35.08" (891mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Williams is 12h and 23min.On the first day of September, sunrise is at 6:51 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:03 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In September, the average daily maximum UV index in Williams 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 maximum daily UV index of 5 during September translates into the following directions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
Is it hot in Williams during September?
What is the average humidity in September in Williams?
How much does it rain in Williams in September?
When it does not snow in Williams?
How many hours of daylight does Williams have in September?
When is the sunrise / sunset in September in Williams?
How long on average sun shines in September in Williams?
What is the UV index intensity in September in Williams?
Average temperature in September
Williams, OK
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is July (93.4°F).
The month with the lowest average high temperature is January (48°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).
Average pressure in September
Williams, OK
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Williams, OK
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Williams, OK
- Average humidity in September: 70%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (69%).
Average rainfall in September
Williams, OK
- Average rainfall in September: 2.68"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in September
Williams, OK
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is March (15.4 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in September
Williams, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Williams, OK
- 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
Williams, 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: 9h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Williams, OK
- Average sunshine days in September: 16.4 days
The months with the most sunshine days are November and December (19.3 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in September
Williams, OK
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Williams, OK
- Average cloud cover in September: 26
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Williams, 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).
Williams, Oklahoma, USA
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