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, Mount Baldy experiences an average high-temperature of a moderately hot 85.6°F (29.8°C), marking a minor shift from the preceding month. Mount Baldy anticipates a considerable drop in temperature at night in September, with an average low of 62.6°F (17°C).Heat index
In September, the heat index is computed to be a hot 86°F (30°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.In terms of the heat index, values are set with light wind and shade conditions in mind. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
In September, the average relative humidity is 43%.Rainfall
January through June, September through December are months with rainfall. September is the first month it rains in Mount Baldy. Throughout September, in the average 1.5 rainfall days, it receives 0.04" (1mm) of precipitation. Throughout the year, there are 28.4 rainfall days, and 3.86" (98mm) of precipitation is accumulated.Snowfall
June through October are months without snowfall in Mount Baldy.Daylight
The average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:24 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:35 pm PDT.
Sunshine
In September, the average sunshine in Mount Baldy is 10.8h.UV index
In Mount Baldy, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Mount Baldy in September?
What is the average humidity in September in Mount Baldy?
When does it start to rain in Mount Baldy?
When it does not snow in Mount Baldy?
How many hours of daylight does Mount Baldy have in September?
When is the sunrise / sunset in September in Mount Baldy?
How long on average sun shines in September in Mount Baldy?
How high is the UV index in September in Mount Baldy?
Average temperature in September
Mount Baldy, CA
- Average high temperature in September: 85.6°F
The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is December (58.1°F).
- Average low temperature in September: 62.6°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (42.6°F).
Average pressure in September
Mount Baldy, CA
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Mount Baldy, CA
- Average wind speed in September: 4.6mph
The windiest months (with the highest average wind speed) are April and May (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).
Average humidity in September
Mount Baldy, CA
- Average humidity in September: 43%
The month with the highest relative humidity is March (54%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Mount Baldy, CA
- Average rainfall in September: 0.04"
The wettest month (with the highest rainfall) is February (0.94").
The driest months (with the least rainfall) are July and August (0").
Average rainfall days in September
Mount Baldy, CA
- Average rainfall days in September: 1.5 days
The month with the highest number of rainy days is March (5 days).
The month with the least rainy days is June (0.6 days).
Average snowfall in September
Mount Baldy, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Mount Baldy, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (2.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Mount Baldy, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The months with the least sunshine are January, February and December (Average sunshine: 7h and 0min).
Average sunshine days in September
Mount Baldy, CA
- Average sunshine days in September: 28.2 days
The month with the most sunshine days is August (30.3 days).
The month with the least sunshine days is February (23.3 days).
Average UV index in September
Mount Baldy, CA
- Average UV index in September: 6
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Mount Baldy, CA
- Average cloud cover in September: 6
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in September
Mount Baldy, 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).
Mount Baldy, California, USA
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