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 shift from August to September involves a decrease in the average high-temperature, from a hot 94.5°F (34.7°C) to a moderately hot 85.1°F (29.5°C). During the month of September, Mountain View experiences a steady low-temperature average of 65.8°F (18.8°C).Heat index
In September, the average heat index is computed to be a hot 89.6°F (32°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.One should consider that heat index numbers are for shaded settings and light wind. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are primarily vital for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
In Mountain View, the average relative humidity in September is 62%.Rainfall
In September, the rain falls for 13.3 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. Throughout the year, there are 112.6 rainfall days, and 21.54" (547mm) of precipitation is accumulated.Snowfall
In Mountain View, snow does not fall in May through October.Daylight
In Mountain View, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:08 am and sunset at 8:01 pm. On the last day of September, in Mountain View, sunrise is at 7:29 am and sunset at 7:19 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In Mountain View, Oklahoma, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 5 in September leads to these recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Mountain View in September?
What is the average humidity in September in Mountain View?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Mountain View have in September?
What is the UV index reading in September?
Average temperature in September
Mountain View, OK
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is July (94.6°F).
The months with the lowest average high temperature are January and December (50°F).
- Average low temperature in September: 65.8°F
The month with the highest average low temperature is July (74.1°F).
The coldest month (with the lowest average low temperature) is January (31.8°F).
Average pressure in September
Mountain View, 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 (29.87"Hg).
Average wind speed in September
Mountain View, OK
- Average wind speed in September: 9.2mph
The windiest month (with the highest average wind speed) is April (12.6mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).
Average humidity in September
Mountain View, OK
- Average humidity in September: 62%
The month with the highest relative humidity is May (67%).
The month with the lowest relative humidity is August (54%).
Average rainfall in September
Mountain View, OK
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in September
Mountain View, OK
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is January (4 days).
Average snowfall in September
Mountain View, OK
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Mountain View, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.6 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
Mountain View, 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 5min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Mountain View, OK
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is January (25.6 days).
The month with the least sunshine days is May (13.7 days).
Average UV index in September
Mountain View, 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
Mountain View, OK
- Average cloud cover in September: 26
The months with the most cloud cover are March and April (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Mountain View, 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).
Mountain View, Oklahoma, USA
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