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 beginning of September brings a slight decrease in the average high-temperature, transitioning from 81.1°F (27.3°C) in August to a still warm 75.2°F (24°C). An average low-temperature of 57.2°F (14°C) is recorded during the nights in September in Riverlea.Humidity
In September, the average relative humidity is 75%.Rainfall
The month with the least rainfall is September, when the rain falls for 13 days and typically collects 1.77" (45mm) of precipitation.Snowfall
May through September are months without snowfall in Riverlea.Daylight
In Riverlea, the average length of the day in September is 12h and 26min.On the first day of September in Riverlea, Ohio, sunrise is at 7:00 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:15 pm EDT.
Sunshine
In Riverlea, the average sunshine in September is 8.2h.UV index
In Riverlea, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Riverlea in September?
What is the average humidity in September in Riverlea?
What is the driest month in Riverlea?
How much does it rain in Riverlea in September?
When it does not snow in Riverlea?
Does it snow in Riverlea in September?
What is the average length of the day in September in Riverlea?
When is the sunrise / sunset in September in Riverlea?
How long on average sun shines in September in Riverlea?
What is the UV index intensity in September in Riverlea?
Average temperature in September
Riverlea, OH
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in September
Riverlea, OH
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Riverlea, OH
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in September
Riverlea, OH
- Average humidity in September: 75%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are April, October and November (74%).
Average rainfall in September
Riverlea, OH
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is May (3.27").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Riverlea, OH
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is February (9.1 days).
Average snowfall in September
Riverlea, OH
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.87").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Riverlea, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Riverlea, OH
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Riverlea, OH
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is May (9.9 days).
Average UV index in September
Riverlea, OH
- 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, November and December (UV index 2).
Average cloud cover in September
Riverlea, OH
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Riverlea, OH
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Riverlea, Ohio, USA
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