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 in Boulder City includes a small decrease in the average high-temperature, from a fiery hot 100.6°F (38.1°C) to a tropical 92.7°F (33.7°C). The average low-temperature, in September, is a moderately hot 74.7°F (23.7°C).Humidity
In Boulder City, the average relative humidity in September is 22%.Rainfall
In Boulder City, during September, the rain falls for 3.8 days and regularly aggregates up to 0.31" (8mm) of precipitation. In Boulder City, during the entire year, the rain falls for 40.1 days and collects up to 4.02" (102mm) of precipitation.Snowfall
In Boulder City, snow does not fall in January, March through December.Daylight
In September, the average length of the day in Boulder City is 12h and 23min.On the first day of the month, sunrise is at 6:11 am and sunset at 7:06 pm. On the last day of September, in Boulder City, sunrise is at 6:34 am and sunset at 6:23 pm PDT.
Sunshine
In Boulder City, the average sunshine in September is 10.2h.UV index
In Boulder City, the average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 7 during September translates into the following directions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Boulder City in September?
What is the average humidity in September in Boulder City?
How much does it rain in Boulder City in September?
When it does not snow in Boulder City?
How many hours of daylight does Boulder City have in September?
What time are sunrise and sunset in September in Boulder City?
How many hours of sunshine does Boulder City have in September?
What is the UV index reading in September in Boulder City?
Average temperature in September
Boulder City, NV
- Average high temperature in September: 92.7°F
The warmest month (with the highest average high temperature) is July (101.7°F).
The month with the lowest average high temperature is December (53.1°F).
- Average low temperature in September: 74.7°F
The month with the highest average low temperature is July (81.7°F).
The coldest month (with the lowest average low temperature) is December (39.9°F).
Average pressure in September
Boulder City, NV
- Average pressure in September: 29.85"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.77"Hg).
Average wind speed in September
Boulder City, NV
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is June (9.6mph).
The calmest month (with the lowest average wind speed) is January (5.8mph).
Average humidity in September
Boulder City, NV
- Average humidity in September: 22%
The month with the highest relative humidity is January (46%).
The month with the lowest relative humidity is June (14%).
Average rainfall in September
Boulder City, NV
- Average rainfall in September: 0.31"
The wettest months (with the highest rainfall) are February, November and December (0.51").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Boulder City, NV
- Average rainfall days in September: 3.8 days
The month with the highest number of rainy days is December (5.3 days).
The month with the least rainy days is June (0.4 days).
Average snowfall in September
Boulder City, NV
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.08").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Boulder City, NV
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Boulder City, NV
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Boulder City, NV
- Average sunshine days in September: 24.4 days
The month with the most sunshine days is June (29.3 days).
The months with the least sunshine days are July and August (22.9 days).
Average UV index in September
Boulder City, NV
- Average UV index in September: 7
The months with the highest UV index are June, July and August (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Boulder City, NV
- Average cloud cover in September: 6
The month with the most cloud cover is December (Cloud cover 20).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in September
Boulder City, NV
- 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).
Boulder City, Nevada, USA
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