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
September brings a slight decrease in temperature, down from 81.7°F (27.6°C) in August to a still moderately hot 76.1°F (24.5°C). The average temperature in Santiago drops to a fresh 54.7°F (12.6°C) during the night in the month of September.Humidity
In Santiago, West Virginia, the average relative humidity in September is 78%.Rainfall
September and November are months with the least rain when the rain falls for 15.8 days and typically aggregates up to 2.2" (56mm) of rain.Snowfall
June through September are months without snowfall in Santiago.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:16 am and sunset at 7:04 pm EDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Be vigilant - Suggestions to stave off sun damage are provided. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Santiago?
What is the average humidity in September in Santiago?
What is the driest month in Santiago?
How much does it rain in Santiago in September?
When it does not snow in Santiago?
Does it snow in Santiago in September?
What is the average length of the day in September in Santiago?
What time are sunrise and sunset in September in Santiago?
How many hours of sunshine does Santiago have in September?
What is the UV index reading in September in Santiago?
Average temperature in September
Santiago, WV
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in September
Santiago, WV
- Average pressure in September: 30.06"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
Santiago, WV
- Average wind speed in September: 4.5mph
The windiest months (with the highest average wind speed) are January and February (7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in September
Santiago, WV
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are August and November (77%).
Average rainfall in September
Santiago, WV
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is May (4.41").
The driest months (with the least rainfall) are September and November (2.2").
Average rainfall days in September
Santiago, WV
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is May (21.8 days).
The month with the least rainy days is February (10.8 days).
Average snowfall in September
Santiago, WV
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.73").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Santiago, WV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Santiago, 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 24min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Santiago, WV
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is November (14.7 days).
The month with the least sunshine days is May (7.7 days).
Average UV index in September
Santiago, WV
- Average UV index in September: 4
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Santiago, WV
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Santiago, WV
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is January (4mi).
Santiago, West Virginia, USA
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