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 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
Sespe registers an average high-temperature of a still moderately hot 81.1°F (27.3°C) at the commencement of September, closely related to the preceding month. During September, Sespe's temperature falls to a steady low-temperature average of 59.7°F (15.4°C).Heat index
In September, the average heat index is estimated at 82.4°F (28°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'real feel', binds temperature metrics with humidity values to give a sense of the actual warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
Humidity
In September, the average relative humidity is 49%.Rainfall
In Sespe, in September, it is raining for 2.4 days, with typically 0.16" (4mm) of accumulated precipitation. Throughout the year, there are 52.1 rainfall days, and 9.02" (229mm) of precipitation is accumulated.Snowfall
January, February, April through December are months without snowfall.Daylight
The average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:29 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:40 pm PDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 5 in September transforms into this advice:
Make use of precautions - Suggestions to resist sunburn are communicated. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Sespe in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Sespe have in September?
What is the UV index intensity in September?
Average temperature in September
Sespe, CA
- Average high temperature in September: 81.1°F
The warmest month (with the highest average high temperature) is August (84.2°F).
The month with the lowest average high temperature is December (59.2°F).
- Average low temperature in September: 59.7°F
The month with the highest average low temperature is August (61.5°F).
The coldest month (with the lowest average low temperature) is February (43.3°F).
Average pressure in September
Sespe, CA
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Sespe, CA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is December (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).
Average humidity in September
Sespe, CA
- Average humidity in September: 49%
The month with the highest relative humidity is March (60%).
The months with the lowest relative humidity are October and November (47%).
Average rainfall in September
Sespe, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is February (1.85").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Sespe, CA
- Average rainfall days in September: 2.4 days
The month with the highest number of rainy days is March (8.3 days).
The months with the least rainy days are June and August (1.2 days).
Average snowfall days in September
Sespe, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (0.1 days).
The months with the least snowfall days are January, February, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Sespe, 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 months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
Sespe, CA
- Average sunshine days in September: 26.1 days
The month with the most sunshine days is August (28.3 days).
The month with the least sunshine days is February (21 days).
Average UV index in September
Sespe, 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 November and December (UV index 3).
Average cloud cover in September
Sespe, CA
- Average cloud cover in September: 6
The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Sespe, 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).
Sespe, California, USA
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