September weather forecastFoster, OK
September
Weather in September
The first month of the autumn, September, is still a warm month in Foster, Oklahoma, with an average temperature varying between 84.9°F (29.4°C) and 66°F (18.9°C).Temperature
In Foster, the average high-temperature in September decreases from a tropical 93.9°F (34.4°C) in August to a warm 84.9°F (29.4°C). An average minimum temperature of 66°F (18.9°C) marks the month of September.Heat index
For September, the heat index is evaluated at a tropical 91.4°F (33°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important 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 September, the average relative humidity is 65%.Rainfall
In Foster, Oklahoma, in September, it is raining for 12.1 days, with typically 2.56" (65mm) of accumulated precipitation. In Foster, during the entire year, the rain falls for 119.9 days and collects up to 24.65" (626mm) of precipitation.Snowfall
In Foster, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 7:03 am and sunset at 7:55 pm. On the last day of September, sunrise is at 7:24 am and sunset at 7:14 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Take precautions - Protection against sunburn is recommended. To guard against the harmful effects of the Sun, minimize exposure during midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Foster, OK
- Average high temperature in September: 84.9°F
The warmest months (with the highest average high temperature) are July and August (93.9°F).
The month with the lowest average high temperature is January (50.2°F).
- Average low temperature in September: 66°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in September
Foster, 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
Foster, OK
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
Foster, OK
- Average humidity in September: 65%
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is August (58%).
Average rainfall in September
Foster, OK
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is May (3.94").
The driest months (with the least rainfall) are February and November (1.06").
Average rainfall days in September
Foster, OK
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in September
Foster, OK
- 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
Foster, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 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
Foster, OK
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in September
Foster, OK
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is January (24 days).
The month with the least sunshine days is May (14.1 days).
Average UV index in September
Foster, 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
Foster, OK
- Average cloud cover in September: 27
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Foster, 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).
