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 from August to September sees average high-temperatures adjusting to a still moderately hot 82.8°F (28.2°C), from a not significantly different 84.7°F (29.3°C). In Santee, the average low-temperature during the month of September is a comfortable 63.7°F (17.6°C).Heat index
September's mean heat index is appraised at a tropical 86°F (30°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. 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 particularly meaningful for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Humidity
The average relative humidity in September is 59%.Rainfall
In Santee, during September, the rain falls for 3.4 days and regularly aggregates up to 0.28" (7mm) of precipitation. In Santee, during the entire year, the rain falls for 47.9 days and collects up to 5.31" (135mm) of precipitation.Daylight
In September, the average length of the day 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, in Santee, California, 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
The months with the highest UV index in Santee are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 6 during September translates into the following guidance:
Shield from overexposure. Defense against sun-related harm is required. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Frequently asked questions
How hot does it get in Santee in September?
What is the average humidity in September in Santee?
How much does it rain in Santee in September?
How many hours of daylight does Santee have in September?
What time are sunrise and sunset in September in Santee?
How many hours of sunshine does Santee have in September?
When is the highest UV index in Santee?
How high is the UV index 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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