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 signals a slight drop in average high-temperature, sliding from August's hot 92.1°F (33.4°C) to a moderately hot 85.1°F (29.5°C). During September nights, Longtown records an average temperature of 64.4°F (18°C).Heat index
Throughout September, the heat index is evaluated at a hot 93.2°F (34°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. 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 September, the average relative humidity is 69%.Rainfall
In Longtown, in September, it is raining for 12.1 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, there are 135.7 rainfall days, and 30.63" (778mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September in Longtown is 12h and 23min.On the first day of the month, sunrise is at 6:55 am and sunset at 7:48 pm. On the last day of September, in Longtown, sunrise is at 7:16 am and sunset at 7:06 pm CDT.
Sunshine
The average sunshine in September is 9.1h.UV index
In Longtown, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
How hot is it in Longtown in September?
What is the average humidity in September in Longtown?
How much does it rain in Longtown in September?
When it does not snow in Longtown?
How many hours of daylight does Longtown have in September?
When are sunrise and sunset in September in Longtown?
How many hours of sunshine does Longtown have in September?
What is the UV index intensity in September in Longtown?
Average temperature in September
Longtown, OK
- Average high temperature in September: 85.1°F
The warmest months (with the highest average high temperature) are July and August (92.1°F).
The month with the lowest average high temperature is January (48.4°F).
- Average low temperature in September: 64.4°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (32.7°F).
Average pressure in September
Longtown, OK
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Longtown, OK
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is March (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in September
Longtown, OK
- Average humidity in September: 69%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Longtown, OK
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days in September
Longtown, OK
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
Longtown, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Longtown, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.1 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
Longtown, 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 1min
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 30min).
Average sunshine days in September
Longtown, OK
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is January (21.2 days).
The month with the least sunshine days is April (14.8 days).
Average UV index in September
Longtown, 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
Longtown, OK
- Average cloud cover in September: 27
The months with the most cloud cover are February and March (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Longtown, 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).
Longtown, Oklahoma, USA
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