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 arrival of September signals a subtle shift in temperature, down from a moderately hot 82°F (27.8°C) in August to a still warm 76.3°F (24.6°C). Adelphi records a mean low-temperature of 56.5°F (13.6°C) in September.Humidity
In Adelphi, the average relative humidity in September is 77%.Rainfall
September is the month with the least rainfall in Adelphi. Rain falls for 13.5 days and accumulates 1.93" (49mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Adelphi, Ohio, is 12h and 26min.On the first day of the month, sunrise is at 7:00 am and sunset at 8:01 pm. On the last day of September, in Adelphi, Ohio, sunrise is at 7:26 am and sunset at 7:14 pm EDT.
Sunshine
In Adelphi, the average sunshine in September is 8.2h.UV index
In September, the average daily maximum UV index in Adelphi is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 in September translates into this advice:
Put precautions into practice - Guidance to elude sunburn is provided. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Adelphi?
What is the average humidity in September in Adelphi?
What is the driest month in Adelphi?
How much does it rain in Adelphi in September?
When it does not snow in Adelphi?
Does it snow in Adelphi in September?
How many hours of daylight does Adelphi have in September?
When is the sunrise / sunset in September in Adelphi?
How long on average sun shines in September in Adelphi?
What is the UV index reading in September in Adelphi?
Average temperature in September
Adelphi, OH
- Average high temperature in September: 76.3°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in September: 56.5°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 (22.3°F).
Average pressure in September
Adelphi, OH
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Adelphi, OH
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in September
Adelphi, OH
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in September
Adelphi, OH
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Adelphi, OH
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in September
Adelphi, OH
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (3.43").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Adelphi, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Adelphi, OH
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
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 42min).
Average sunshine days in September
Adelphi, OH
- Average sunshine days in September: 14 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is May (9.2 days).
Average UV index in September
Adelphi, 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
Adelphi, OH
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Adelphi, 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).
Adelphi, Ohio, USA
Weather forecast for your location
2. Allow the app to use your location