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
Transitioning into September, Glenhaven experiences an average high-temperature of a moderately hot 84.2°F (29°C), marking a minor shift from the preceding month. September nights in Glenhaven show a substantial disparity from the daytime peak with an average low-temperature of 54.1°F (12.3°C).Heat index
For September, the heat index is appraised at 84.2°F (29°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.Heat index evaluations are typically in the context of light winds and shaded environments. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
In September, the average relative humidity in Glenhaven is 48%.Rainfall
In Glenhaven, in September, during 2.5 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. In Glenhaven, during the entire year, the rain falls for 92 days and collects up to 21.02" (534mm) of precipitation.Snowfall
In Glenhaven, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September in Glenhaven, sunrise is at 6:40 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:54 pm PDT.
Sunshine
The average sunshine in September is 11h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, the UV index of 5 transforms into the following advice:
Exercise prevention - Protecting skin and eyes from harm is required. To avoid the Sun's strongest rays, limit exposure around the mid-day period. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
How hot does it get in Glenhaven in September?
What is the average humidity in September in Glenhaven?
How much does it rain in Glenhaven in September?
When it does not snow in Glenhaven?
What is the average length of the day in September in Glenhaven?
What time are sunrise and sunset in September in Glenhaven?
How long on average sun shines in September in Glenhaven?
What is the UV index reading in September in Glenhaven?
Average temperature in September
Glenhaven, CA
- Average high temperature in September: 84.2°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (52.3°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).
Average pressure in September
Glenhaven, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in September
Glenhaven, CA
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is April (5.3mph).
The calmest month (with the lowest average wind speed) is November (4.1mph).
Average humidity in September
Glenhaven, CA
- Average humidity in September: 48%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (47%).
Average rainfall in September
Glenhaven, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is February (4.06").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in September
Glenhaven, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (15.9 days).
The months with the least rainy days are July and August (1.3 days).
Average snowfall in September
Glenhaven, CA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Glenhaven, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Glenhaven, 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 30min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Glenhaven, CA
- Average sunshine days in September: 26.7 days
The months with the most sunshine days are July and August (28.3 days).
The month with the least sunshine days is March (13.7 days).
Average UV index in September
Glenhaven, CA
- Average UV index in September: 5
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 3).
Average cloud cover in September
Glenhaven, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in September
Glenhaven, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are March and December (5mi).
Glenhaven, California, USA
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