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
The transition to September results in a modest reduction in average high-temperature, moving from a very hot 96.8°F (36°C) in August to a hot 90.5°F (32.5°C). During September, Glenn reports a marked contrast from daily peak temperatures, with an average nighttime reading of 61.9°F (16.6°C).Humidity
The average relative humidity in September in Glenn is 33%.Rainfall
In Glenn, in September, during 2.7 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. 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 in Glenn, 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 Glenn, the average sunshine in September is 11.1h.UV index
In Glenn, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Frequently asked questions
How hot does it get in Glenn in September?
What is the average humidity in September in Glenn?
How much does it rain in Glenn in September?
What is the average length of the day in September in Glenn?
What time are sunrise and sunset in September in Glenn?
How long on average sun shines in September in Glenn?
What is the UV index reading in September in Glenn?
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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