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
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a tropical 92.1°F (33.4°C) in August to a moderately hot 85.1°F (29.5°C). An average low-temperature of 64.4°F (18°C) is noted during the month of September.Heat index
The average heat index in September is calculated to be a tropical 93.2°F (34°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
Humidity
In Longtown, the average relative humidity in September 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
In September, the average length of the day 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, sunrise is at 7:16 am and sunset at 7:06 pm CDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
In Longtown, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 5 in September translates into this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. It's recommended to limit sun exposure when its radiation is at its peak during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index 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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