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
A minor decrease in the average high-temperature is observed during September, shifting from a tropical 90.9°F (32.7°C) in August to a warm 83.7°F (28.7°C). During the month of September, Bristow's nighttime temperature lowers to an average of 64.2°F (17.9°C).Heat index
Throughout September, the heat index is estimated at a hot 89.6°F (32°C). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.Heat index's context suggests values are appropriate for shady areas and slight breezes. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical 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 highly critical for babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Humidity
In September, the average relative humidity is 69%.Rainfall
In Bristow, in September, during 11.8 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. In Bristow, during the entire year, the rain falls for 127.9 days and collects up to 27.76" (705mm) of precipitation.Snowfall
In Bristow, snow does not fall in April through October.Daylight
In September, the average length of the day in Bristow, Oklahoma, is 12h and 23min.On the first day of the month, sunrise is at 6:58 am and sunset at 7:52 pm. On the last day of September, in Bristow, sunrise is at 7:20 am and sunset at 7:10 pm CDT.
Sunshine
In September, the average sunshine in Bristow, Oklahoma, is 8.6h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Frequently asked questions
Is it hot in Bristow during September?
What is the average humidity in September in Bristow?
How much does it rain in Bristow in September?
When it does not snow in Bristow?
What is the average length of the day in September in Bristow?
When are sunrise and sunset in September in Bristow?
How long on average sun shines in September in Bristow?
What is the UV index intensity in September in Bristow?
Average temperature in September
Bristow, OK
- Average high temperature in September: 83.7°F
The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is January (47.1°F).
- Average low temperature in September: 64.2°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 (31.5°F).
Average pressure in September
Bristow, 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
Bristow, OK
- Average wind speed in September: 7.7mph
The windiest months (with the highest average wind speed) are March and April (11mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in September
Bristow, OK
- Average humidity in September: 69%
The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January and August (66%).
Average rainfall in September
Bristow, OK
- Average rainfall in September: 3.11"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in September
Bristow, OK
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in September
Bristow, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Bristow, 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
Bristow, OK
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
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 48min).
Average sunshine days in September
Bristow, OK
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in September
Bristow, OK
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Bristow, OK
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Bristow, 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).
Bristow, Oklahoma, USA
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