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
In September, the average high-temperature marginally drops from a hot 92.1°F (33.4°C) in August to a warm 85.1°F (29.5°C). Arch's temperature in September lowers to a consistent average of 64.6°F (18.1°C) during the nights.Heat index
The heat index for September is calculated to be a tropical 93.2°F (34°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.It is emphasized that the heat index's values are meant for shaded zones with mild winds. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
The average relative humidity in September is 70%.Rainfall
In Arch, Oklahoma, in September, during 12 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the year, there are 128.5 rainfall days, and 24.25" (616mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Arch.Daylight
The average length of the day in September is 12h and 23min.On the first day of September in Arch, Oklahoma, sunrise is at 6:56 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:07 pm CDT.
Sunshine
In September, the average sunshine is 9h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
How hot does it get in Arch in September?
What is the average humidity in September in Arch?
How many days does it rain in September in Arch?
When it does not snow in Arch?
How many hours of daylight does Arch have in September?
When are sunrise and sunset in September in Arch?
How long on average sun shines in September in Arch?
What is the UV index reading in September in Arch?
Average temperature in September
Arch, OK
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is January (48.7°F).
- Average low temperature in September: 64.6°F
The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).
Average pressure in September
Arch, 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
Arch, OK
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in September
Arch, OK
- Average humidity in September: 70%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Arch, OK
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in September
Arch, OK
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in September
Arch, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Arch, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 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
Arch, 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 54min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Arch, OK
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is January (22 days).
The month with the least sunshine days is July (14.4 days).
Average UV index in September
Arch, 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
Arch, OK
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Arch, 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).
Arch, Oklahoma, USA
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