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 onset of September, Washington's average high-temperature slightly adjusts, moderately receding from August's hot 93°F (33.9°C) to a moderately hot 84.7°F (29.3°C). Throughout September, the average low-temperature records at a comfortable 65.7°F (18.7°C).Heat index
In September, the heat index is estimated at a tropical 91.4°F (33°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Humidity
In September, the average relative humidity in Washington, Oklahoma, is 67%.Rainfall
In Washington, in September, during 12.9 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Washington, during the entire year, the rain falls for 116.5 days and collects up to 24.21" (615mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:03 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:24 am and sunset at 7:14 pm CDT.
Sunshine
In Washington, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Washington, Oklahoma, is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 in September translates into these instructions:
Undertake protective steps - Preventing sun damage is advised. When the Sun is at its strongest around midday, find shade and limit exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
How hot is it in Washington in September?
What is the average humidity in September in Washington?
How much does it rain in Washington in September?
When it does not snow in Washington?
How many hours of daylight does Washington have in September?
When is the sunrise / sunset in September in Washington?
How many hours of sunshine does Washington have in September?
How high is the UV index in September in Washington?
Average temperature in September
Washington, OK
- Average high temperature in September: 84.7°F
The warmest months (with the highest average high temperature) are July and August (93°F).
The month with the lowest average high temperature is January (49.5°F).
- Average low temperature in September: 65.7°F
The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).
Average pressure in September
Washington, OK
- 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 (29.88"Hg).
Average wind speed in September
Washington, OK
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
Washington, OK
- Average humidity in September: 67%
The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Washington, OK
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is May (3.54").
The driest month (with the least rainfall) is November (0.98").
Average rainfall days in September
Washington, OK
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in September
Washington, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.65").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Washington, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 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
Washington, 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 3min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Washington, OK
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is January (24 days).
The month with the least sunshine days is May (14.4 days).
Average UV index in September
Washington, 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
Washington, OK
- Average cloud cover in September: 27
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Washington, 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).
Washington, Oklahoma, USA
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