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
As Rockville enters September, the average high-temperature subtly lowers from the a moderately hot 85.3°F (29.6°C) of August to a still warm 78.3°F (25.7°C). Despite a significant disparity with daytime temperatures, an average low-temperature of 56.1°F (13.4°C) is recorded during September.Humidity
In September, the average relative humidity in Rockville is 64%.Rainfall
In Rockville, during September, the rain falls for 9.8 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, there are 102.7 rainfall days, and 18.15" (461mm) of precipitation is accumulated.Snowfall
In Rockville, snow does not fall in May through September.Daylight
In Rockville, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 7:02 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:18 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily UV index of 5 turns into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Rockville?
What is the average humidity in September in Rockville?
How many days does it rain in September in Rockville?
When it does not snow in Rockville?
Does it snow in Rockville in September?
How many hours of daylight does Rockville have in September?
When is the sunrise / sunset in September in Rockville?
How many hours of sunshine does Rockville have in September?
How high is the UV index in September in Rockville?
Average temperature in September
Rockville, NE
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in September: 56.1°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Rockville, NE
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Rockville, NE
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in September
Rockville, NE
- Average humidity in September: 64%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is October (60%).
Average rainfall in September
Rockville, NE
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Rockville, NE
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is December (2.7 days).
Average snowfall in September
Rockville, NE
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Rockville, NE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rockville, NE
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
Rockville, NE
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is November (23.7 days).
The month with the least sunshine days is May (14.9 days).
Average UV index in September
Rockville, NE
- Average UV index in September: 5
The months with the highest UV index are 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
Rockville, NE
- Average cloud cover in September: 25
The months with the most cloud cover are January, February and March (Cloud cover 41).
The months with the least cloud cover are July and September (Cloud cover 25).
Average visibility in September
Rockville, NE
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Rockville, Nebraska, USA
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