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 shift from August to September includes a small decrease in the average high-temperature, from 84°F (28.9°C) to a still warm 75.4°F (24.1°C). The temperature dips to an average of 54.5°F (12.5°C) during September nights.Humidity
The least humid month in Ree Heights is September, with an average relative humidity of 60%.Rainfall
In Ree Heights, in September, during 9 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. Throughout the year, in Ree Heights, there are 97.3 rainfall days, and 16.73" (425mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Ree Heights, South Dakota.Daylight
In Ree Heights, South Dakota, the average length of the day in September is 12h and 30min.On the first day of September in Ree Heights, sunrise is at 7:00 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:18 pm CDT.
Sunshine
In September, the average sunshine in Ree Heights, South Dakota, is 8.6h.UV index
In Ree Heights, South Dakota, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a regular UV index of 5 translates into these guidelines:
Be vigilant - Preventing sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Ree Heights?
What is the least humid month in Ree Heights?
What is the average humidity in September in Ree Heights?
How many days does it rain in September in Ree Heights?
When it does not snow in Ree Heights?
Does it snow in Ree Heights in September?
How many hours of daylight does Ree Heights have in September?
When are sunrise and sunset in September in Ree Heights?
How many hours of sunshine does Ree Heights have in September?
What is the UV index reading in September in Ree Heights?
Average temperature in September
Ree Heights, SD
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).
Average pressure in September
Ree Heights, SD
- Average pressure in September: 29.95"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Ree Heights, SD
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).
Average humidity in September
Ree Heights, SD
- Average humidity in September: 60%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (60%).
Average rainfall in September
Ree Heights, SD
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Ree Heights, SD
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in September
Ree Heights, SD
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Ree Heights, SD
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January and February (10.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Ree Heights, 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 4min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Ree Heights, SD
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is November (22.1 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in September
Ree Heights, SD
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Ree Heights, SD
- Average cloud cover in September: 26
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 24).
Average visibility in September
Ree Heights, 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).
Ree Heights, South Dakota, USA
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