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
Stepping into September, Santee records an average high-temperature of a still moderately hot 82.8°F (28.2°C), almost consistent with August. An average low-temperature of 63.7°F (17.6°C) is anticipated throughout the nights during September.Heat index
September's heat index is computed to be a hot 86°F (30°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Metrics for the heat index primarily focus on shaded spots and light wind conditions. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
In Santee, the average relative humidity in September is 59%.Rainfall
In Santee, in September, it is raining for 3.4 days, with typically 0.28" (7mm) of accumulated precipitation. In Santee, during the entire year, the rain falls for 47.9 days and collects up to 5.31" (135mm) of precipitation.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:12 pm. On the last day of September, sunrise is at 6:41 am and sunset at 6:33 pm PDT.
Sunshine
In Santee, the average sunshine in September is 10.4h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The UV index of 6 in September translates into these instructions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full 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 is it in September?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Santee have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What are the months with the highest UV index?
What is the UV index reading in September in Santee?
Average temperature in September
Santee, CA
- Average high temperature in September: 82.8°F
The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is February (46.9°F).
Average pressure in September
Santee, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.87"Hg).
Average wind speed in September
Santee, CA
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is April (5.4mph).
The calmest month (with the lowest average wind speed) is October (4.2mph).
Average humidity in September
Santee, CA
- Average humidity in September: 59%
The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is November (54%).
Average rainfall in September
Santee, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is February (1.14").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Santee, CA
- Average rainfall days in September: 3.4 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.4 days).
Average daylight in September /
Average sunshine in September
Santee, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Santee, CA
- Average sunshine days in September: 24.2 days
The month with the most sunshine days is June (28 days).
The month with the least sunshine days is February (22.3 days).
Average UV index in September
Santee, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Santee, CA
- Average cloud cover in September: 10
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in September
Santee, 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).
Santee, California, USA
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