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 beginning of September subtly marks a decrease in the average high-temperature, transitioning from a hot 92.3°F (33.5°C) in August to a warm 84.4°F (29.1°C). Lima records an average nighttime low of 64.4°F (18°C) in September.Heat index
The heat index for September is evaluated at a tropical 91.4°F (33°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.It is emphasized that the heat index's values are meant for shaded zones with mild winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', comes about by integrating the temperature readings with the humidity levels. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
In September, the average relative humidity is 69%.Rainfall
In September, the rain falls for 11.9 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. Throughout the year, there are 126.5 rainfall days, and 27.52" (699mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, September, November and December. 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 5.5 snowfall days, and 3.07" (78mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:59 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:11 pm CDT.
Sunshine
In Lima, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Be vigilant - Preventing sunburn is recommended. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
How many hours of daylight does Lima have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Lima, OK
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is August (92.3°F).
The month with the lowest average high temperature is January (48.7°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 (33.3°F).
Average pressure in September
Lima, 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
Lima, OK
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is March (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in September
Lima, 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 (64%).
Average rainfall in September
Lima, OK
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in September
Lima, OK
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in September
Lima, OK
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in September
Lima, OK
- Average snowfall days in September: 0.1 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 and October (0 days).
Average daylight in September /
Average sunshine in September
Lima, 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 4min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Lima, OK
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is May (14.3 days).
Average UV index in September
Lima, 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
Lima, 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
Lima, 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).
Lima, Oklahoma, USA
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