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 transition into September subtly indicates a reduction in the average high-temperature, down to a warm 79.2°F (26.2°C) from August's hot 86.5°F (30.3°C). In the face of high daytime temperatures, Alvin witnesses a consistent average nighttime low of 56.5°F (13.6°C) during September.Humidity
The least humid month is September, with an average relative humidity of 51%.Rainfall
In Alvin, during September, the rain falls for 8.7 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, there are 119.5 rainfall days, and 16.14" (410mm) of precipitation is accumulated.Snowfall
In Alvin, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:19 pm. On the last day of September, sunrise is at 6:44 am and sunset at 6:31 pm MDT.
Sunshine
In September, the average sunshine is 10h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In September, the UV index of 5 transforms into the following advice:
Take precautions - Protection against sunburn is recommended. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Alvin?
What is the least humid month in Alvin?
What is the average humidity in September in Alvin?
How many days does it rain in September in Alvin?
When it does not snow in Alvin?
Does it snow in Alvin in September?
What is the average length of the day in September in Alvin?
What time are sunrise and sunset in September in Alvin?
How many hours of sunshine does Alvin have in September?
How high is the UV index in September in Alvin?
Average temperature in September
Alvin, CO
- Average high temperature in September: 79.2°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 (39.2°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is December (23.2°F).
Average pressure in September
Alvin, CO
- Average pressure in September: 29.93"Hg
The months with the highest atmospheric pressure are January and December (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in September
Alvin, CO
- Average wind speed in September: 10.1mph
The windiest month (with the highest average wind speed) is April (12.4mph).
The calmest month (with the lowest average wind speed) is August (9.4mph).
Average humidity in September
Alvin, CO
- Average humidity in September: 51%
The months with the highest relative humidity are January and February (66%).
The month with the lowest relative humidity is September (51%).
Average rainfall in September
Alvin, CO
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Alvin, CO
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is May (17.8 days).
The months with the least rainy days are November and December (4.2 days).
Average snowfall in September
Alvin, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Alvin, CO
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alvin, 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 0min
The months with the most sunshine are July and August (Average sunshine: 11h and 30min).
The months with the least sunshine are February and December (Average sunshine: 6h and 12min).
Average sunshine days in September
Alvin, CO
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is November (22.7 days).
The month with the least sunshine days is May (10.6 days).
Average UV index in September
Alvin, CO
- 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
Alvin, CO
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Alvin, 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).
Alvin, Colorado, USA
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