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
Porto Rico's September weather shows a modest shift in high-temperatures, falling from August's warm 82.6°F (28.1°C) to a still moderately hot 76.8°F (24.9°C). The nighttime temperature in Porto Rico, West Virginia, during September, averages of 55.4°F (13°C).Humidity
In September, the average relative humidity in Porto Rico is 78%.Rainfall
The month with the least rainfall in Porto Rico is September, when the rain falls for 15.1 days and typically collects 2.24" (57mm) of precipitation.Snowfall
In Porto Rico, snow does not fall in June through September.Daylight
In September, the average length of the day in Porto Rico, West Virginia, is 12h and 26min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:06 pm EDT.
Sunshine
The average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Porto Rico?
What is the average humidity in September in Porto Rico?
What is the driest month in Porto Rico?
How many days does it rain in September in Porto Rico?
When it does not snow in Porto Rico?
Does it snow in Porto Rico in September?
What is the average length of the day in September in Porto Rico?
When is the sunrise / sunset in September in Porto Rico?
How long on average sun shines in September in Porto Rico?
What is the UV index intensity in September in Porto Rico?
Average temperature in September
Porto Rico, WV
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in September
Porto Rico, WV
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Porto Rico, WV
- Average wind speed in September: 4.4mph
The windiest months (with the highest average wind speed) are January and February (6.8mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Porto Rico, WV
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are June, August and November (77%).
Average rainfall in September
Porto Rico, WV
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Porto Rico, WV
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is May (20.6 days).
The month with the least rainy days is November (11.4 days).
Average snowfall in September
Porto Rico, WV
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Porto Rico, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Porto Rico, WV
- 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 30min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Porto Rico, WV
- Average sunshine days in September: 12.4 days
The month with the most sunshine days is November (14.9 days).
The month with the least sunshine days is January (7.4 days).
Average UV index in September
Porto Rico, WV
- 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
Porto Rico, WV
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Porto Rico, WV
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Porto Rico, West Virginia, USA
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