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
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a moderately hot 85.6°F (29.8°C) in August to a still warm 79.5°F (26.4°C). Stillwater documents a substantial deviation from daytime highs with a consistent low-temperature of 57.4°F (14.1°C) during September nights.Humidity
In September, the average relative humidity is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.1 days and typically collects 1.93" (49mm) of precipitation.Snowfall
In Stillwater, Kentucky, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 7:04 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:29 am and sunset at 7:18 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
In Stillwater, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Be vigilant - Preventing sunburn is recommended. Around midday, solar radiation is most harmful; hence, exposure should be limited. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Stillwater in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Stillwater have in September?
When are sunrise and sunset in September in Stillwater?
How many hours of sunshine does Stillwater have in September?
How high is the UV index in September?
Average temperature in September
Stillwater, KY
- Average high temperature in September: 79.5°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (40.3°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in September
Stillwater, KY
- Average pressure in September: 30.05"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Stillwater, KY
- Average wind speed in September: 4.5mph
The windiest months (with the highest average wind speed) are January and February (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Stillwater, KY
- Average humidity in September: 76%
The month with the highest relative humidity is February (80%).
The months with the lowest relative humidity are August and November (74%).
Average rainfall in September
Stillwater, KY
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is February (3.9").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Stillwater, KY
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (11.5 days).
Average snowfall in September
Stillwater, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Stillwater, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.7 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
Stillwater, KY
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are June and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Stillwater, KY
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is October (15.8 days).
The month with the least sunshine days is February (9 days).
Average UV index in September
Stillwater, KY
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Stillwater, KY
- Average cloud cover in September: 35
The months with the most cloud cover are January and February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Stillwater, KY
- Average visibility in September: 5mi
The months with the highest visibility are April, June, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September and December (5mi).
Stillwater, Kentucky, USA
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