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 hot 92.8°F (33.8°C) in August to a warm 84.2°F (29°C). Putnam cools down to an average low-temperature of 65.3°F (18.5°C) throughout the month of September.Heat index
For September, the heat index is computed to be a tropical 87.8°F (31°C). Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.Heat index values are typically calculated for conditions of shade and a light breeze. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
In Putnam, the average relative humidity in September is 60%.Rainfall
In Putnam, Oklahoma, during September, the rain falls for 11.2 days and regularly aggregates up to 1.34" (34mm) of precipitation. In Putnam, during the entire year, the rain falls for 93.7 days and collects up to 15.55" (395mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Putnam, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 7:08 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:20 pm CDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 5 suggests this advice:
Ensure safety - Recommendations to avert sunburn are presented. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Putnam have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Putnam have in September?
What is the UV index intensity in September?
Average temperature in September
Putnam, OK
- Average high temperature in September: 84.2°F
The warmest month (with the highest average high temperature) is July (94.3°F).
The month with the lowest average high temperature is December (47.7°F).
- Average low temperature in September: 65.3°F
The month with the highest average low temperature is July (73.8°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Putnam, 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 (29.86"Hg).
Average wind speed in September
Putnam, OK
- Average wind speed in September: 10.5mph
The windiest month (with the highest average wind speed) is April (13.4mph).
The calmest month (with the lowest average wind speed) is August (9.7mph).
Average humidity in September
Putnam, OK
- Average humidity in September: 60%
The month with the highest relative humidity is May (64%).
The month with the lowest relative humidity is July (53%).
Average rainfall in September
Putnam, OK
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Putnam, OK
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is May (11.6 days).
The month with the least rainy days is December (2.9 days).
Average snowfall in September
Putnam, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Putnam, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Putnam, 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 5min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Putnam, OK
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is January (26.4 days).
The month with the least sunshine days is September (16.8 days).
Average UV index in September
Putnam, 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
Putnam, OK
- Average cloud cover in September: 25
The month with the most cloud cover is April (Cloud cover 34).
The months with the least cloud cover are June and August (Cloud cover 19).
Average visibility in September
Putnam, 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).
Putnam, Oklahoma, USA
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