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
A moderate decline in average high-temperatures is noted in September, moving from a tropical 87.4°F (30.8°C) in August to a moderately hot 79.7°F (26.5°C). The September nights bear witness to a significant drop from the daytime highs, settling at an average temperature of 53.8°F (12.1°C).Humidity
August and September, with an average relative humidity of 43%, are the least humid months.Rainfall
In September, the rain falls for 9.3 days. Throughout September, 0.91" (23mm) of precipitation is accumulated. In La Salle, during the entire year, the rain falls for 104.9 days and collects up to 12.32" (313mm) of precipitation.Snowfall
In La Salle, snow does not fall in June through September.Daylight
The average length of the day in September in La Salle, Colorado, is 12h and 26min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:30 pm. On the last day of September, in La Salle, Colorado, sunrise is at 6:55 am and sunset at 6:42 pm MDT.
Sunshine
The average sunshine in September in La Salle is 10.8h.UV index
In La Salle, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in La Salle?
What is the least humid month in La Salle?
What is the average humidity in September in La Salle?
How many days does it rain in September in La Salle?
When it does not snow in La Salle?
Does it snow in La Salle in September?
How many hours of daylight does La Salle have in September?
What time are sunrise and sunset in September in La Salle?
How many hours of sunshine does La Salle have in September?
What is the UV index reading in September in La Salle?
Average temperature in September
La Salle, CO
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is December (38.8°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).
Average pressure in September
La Salle, CO
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
La Salle, CO
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is December (5.7mph).
Average humidity in September
La Salle, CO
- Average humidity in September: 43%
The month with the highest relative humidity is January (64%).
The months with the lowest relative humidity are August and September (43%).
Average rainfall in September
La Salle, CO
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is January (0.28").
Average rainfall days in September
La Salle, CO
- Average rainfall days in September: 9.3 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (2.1 days).
Average snowfall in September
La Salle, CO
- Average snowfall in September: 0"
The month with the highest snowfall is April (3.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
La Salle, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (8.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
La Salle, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
La Salle, CO
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is December (25.1 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in September
La Salle, CO
- Average UV index in September: 4
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
La Salle, CO
- Average cloud cover in September: 17
The months with the most cloud cover are February and April (Cloud cover 28).
The month with the least cloud cover is June (Cloud cover 16).
Average visibility in September
La Salle, CO
- 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).
La Salle, Colorado, USA
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