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
Sinai's transition into September involves a gentle shift in temperature, receding from a warm 80.2°F (26.8°C) in August to a pleasant 72.5°F (22.5°C). Sinai reports an average nighttime low-temperature of 52.3°F (11.3°C) in September.Humidity
In September, the average relative humidity is 70%.Rainfall
In Sinai, during September, the rain falls for 10.9 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, there are 125.5 rainfall days, and 21.65" (550mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Sinai.Daylight
In September, the average length of the day in Sinai is 12h and 30min.On the first day of the month, sunrise is at 6:52 am and sunset at 8:03 pm. On the last day of September, in Sinai, sunrise is at 7:25 am and sunset at 7:10 pm CDT.
Sunshine
In Sinai, the average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index in Sinai is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off 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 Sinai?
What is the average humidity in September in Sinai?
How many days does it rain in September in Sinai?
When it does not snow in Sinai?
Does it snow in Sinai in September?
What is the average length of the day in September in Sinai?
When is the sunrise / sunset in September in Sinai?
How many hours of sunshine does Sinai have in September?
How high is the UV index in September in Sinai?
Average temperature in September
Sinai, SD
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7°F).
Average pressure in September
Sinai, SD
- Average pressure in September: 29.97"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Sinai, SD
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is July (8.4mph).
Average humidity in September
Sinai, SD
- Average humidity in September: 70%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Sinai, SD
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is November (0.67").
Average rainfall days in September
Sinai, SD
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in September
Sinai, SD
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sinai, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sinai, SD
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Sinai, SD
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in September
Sinai, SD
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Sinai, SD
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in September
Sinai, SD
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Sinai, South Dakota, USA
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