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 implies a soft temperature shift, with average high-temperatures reducing from August's hot 87.8°F (31°C) to a moderately hot 80.4°F (26.9°C). Rockville, during September nights, observes an average temperature of 61.2°F (16.2°C).Humidity
In September, the average relative humidity is 32%.Rainfall
In Rockville, during September, the rain falls for 6.7 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Rockville, during the entire year, the rain falls for 73.7 days and collects up to 9.88" (251mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 7:03 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:16 pm MDT.
Sunshine
The average sunshine in September in Rockville is 9.8h.UV index
In Rockville, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A daily high UV index of 5 in September leads to these guidelines:
Prioritize safety - Recommendations to avert sunburn are shared. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Rockville have in September?
How high is the UV index in September?
Average temperature in September
Rockville, UT
- Average high temperature in September: 80.4°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is December (43.9°F).
- Average low temperature in September: 61.2°F
The month with the highest average low temperature is July (69.4°F).
The coldest months (with the lowest average low temperature) are January and December (28.9°F).
Average pressure in September
Rockville, UT
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Rockville, UT
- Average wind speed in September: 5.6mph
The windiest months (with the highest average wind speed) are April and May (7.5mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).
Average humidity in September
Rockville, UT
- Average humidity in September: 32%
The month with the highest relative humidity is January (64%).
The month with the lowest relative humidity is June (20%).
Average rainfall in September
Rockville, UT
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is March (1.14").
The driest month (with the least rainfall) is June (0.16").
Average rainfall days in September
Rockville, UT
- Average rainfall days in September: 6.7 days
The month with the highest number of rainy days is July (10.9 days).
The month with the least rainy days is June (2.3 days).
Average snowfall in September
Rockville, UT
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.06").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Rockville, UT
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and December (5.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Rockville, UT
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 5min
The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 7h and 0min).
Average sunshine days in September
Rockville, UT
- Average sunshine days in September: 19 days
The month with the most sunshine days is June (25.3 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in September
Rockville, UT
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Rockville, UT
- Average cloud cover in September: 9
The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is June (Cloud cover 6).
Average visibility in September
Rockville, UT
- 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, Utah, USA
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