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 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
Glenn's September weather shows a modest shift in high-temperatures, falling from August's fiery hot 96.8°F (36°C) to a hot 90.5°F (32.5°C). Glenn documents a striking divergence from daytime highs, with an average nighttime temperature of 61.9°F (16.6°C) in September.Humidity
The average relative humidity in September is 33%.Rainfall
In Glenn, California, during September, the rain falls for 2.7 days and regularly aggregates up to 0.2" (5mm) of precipitation. Throughout the year, there are 82.1 rainfall days, and 17.24" (438mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:51 pm PDT.
Sunshine
In September, the average sunshine is 11.1h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the UV index of 6 transforms into the following advice:
Resist overexposure. Safeguarding from solar damage is indispensable. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. 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
How hot does it get in September?
What is the average humidity in September in Glenn?
How much does it rain in September?
How many hours of daylight does Glenn have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Glenn have in September?
What is the UV index reading in September?
Average temperature in September
Glenn, CA
- Average high temperature in September: 90.5°F
The warmest month (with the highest average high temperature) is July (98.4°F).
The month with the lowest average high temperature is December (54.9°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in September
Glenn, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Glenn, CA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (7.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Glenn, CA
- Average humidity in September: 33%
The month with the highest relative humidity is March (69%).
The months with the lowest relative humidity are July and August (32%).
Average rainfall in September
Glenn, CA
- Average rainfall in September: 0.2"
The wettest month (with the highest rainfall) is February (3.19").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in September
Glenn, CA
- Average rainfall days in September: 2.7 days
The month with the highest number of rainy days is March (14.1 days).
The month with the least rainy days is July (1.6 days).
Average daylight in September /
Average sunshine in September
Glenn, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Glenn, CA
- Average sunshine days in September: 26.5 days
The month with the most sunshine days is July (29.5 days).
The month with the least sunshine days is March (16.1 days).
Average UV index in September
Glenn, CA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in September
Glenn, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Glenn, CA
- 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).
Glenn, California, USA
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