September weather forecastWilloughby, OH
September
Weather in September
September, the first month of the autumn in Willoughby, is also an agreeable month, with an average temperature fluctuating between 71.1°F (21.7°C) and 59.5°F (15.3°C).Temperature
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a warm 76.6°F (24.8°C) in August to an agreeable 71.1°F (21.7°C). During the nights in September, the temperature in Willoughby, Ohio, averages to a moderate 59.5°F (15.3°C).Humidity
In Willoughby, Ohio, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall in Willoughby is September, when the rain falls for 16.1 days and typically collects 2.13" (54mm) of precipitation.Snowfall
In Willoughby, snow does not fall in May through October.Ocean temperature
In September, the average ocean temperature in Willoughby, Ohio, is 70.7°F (21.5°C).Note: In water with a temperature of 70.7°F (21.5°C), swimming is not a joy for most people. The challenge of controlling breathing increases as the temperature dips from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Willoughby, the average length of the day in September is 12h and 28min.On the first day of September in Willoughby, sunrise is at 6:52 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:08 pm EDT.
Sunshine
In Willoughby, the average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate 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 translates into these guidelines:
Be vigilant - A duty to shield skin and eyes from injury exists. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Willoughby, OH
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in September: 59.5°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in September
Willoughby, OH
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Willoughby, OH
- Average wind speed in September: 8.5mph
The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in September
Willoughby, OH
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July and August (76%).
Average rainfall in September
Willoughby, OH
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in September
Willoughby, OH
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is October (18 days).
The month with the least rainy days is January (9 days).
Average snowfall in September
Willoughby, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Willoughby, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
Willoughby, OH
- Average sea temperature in September: 70.7°F
The best month for swimming (with the highest average sea temperature) is August (75.7°F).
The coldest month (with the lowest average sea temperature) is February (32.5°F).
Average daylight in September /
Average sunshine in September
Willoughby, OH
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
Willoughby, OH
- Average sunshine days in September: 10.9 days
The month with the most sunshine days is May (11.4 days).
The month with the least sunshine days is January (6.8 days).
Average UV index in September
Willoughby, OH
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Willoughby, OH
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in September
Willoughby, OH
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
