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
In September, the average high-temperature is relatively the same as in August - a still tropical 86.5°F (30.3°C). The average low-temperature, is 56.8°F (13.8°C).Heat index
The average heat index in September is estimated at a tropical 87.8°F (31°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, wind, metabolic differences). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
In Tracy, the average relative humidity in September is 48%.Rainfall
In Tracy, California, in September, it is raining for 2.5 days, with typically 0.16" (4mm) of accumulated precipitation. Throughout the year, in Tracy, there are 60.6 rainfall days, and 5.71" (145mm) of precipitation is accumulated.Snowfall
In Tracy, snow does not fall in January through November.Daylight
The average length of the day in September in Tracy is 12h and 25min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:35 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:50 pm PDT.
Sunshine
The average sunshine in September is 11.4h.UV index
In September, the average daily maximum UV index in Tracy is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
FAQ
What is the temperature in September in Tracy?
What is the average humidity in September in Tracy?
How many days does it rain in September in Tracy?
When it does not snow in Tracy?
How many hours of daylight does Tracy have in September?
What time are sunrise and sunset in September in Tracy?
How many hours of sunshine does Tracy have in September?
What is the UV index intensity in September in Tracy?
Average temperature in September
Tracy, CA
- Average high temperature in September: 86.5°F
The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is December (54.1°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is August (58.6°F).
The coldest months (with the lowest average low temperature) are January and December (40.1°F).
Average pressure in September
Tracy, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Tracy, CA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in September
Tracy, CA
- Average humidity in September: 48%
The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is July (45%).
Average rainfall in September
Tracy, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is March (1.06").
The driest months (with the least rainfall) are June and August (0.08").
Average rainfall days in September
Tracy, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (10.6 days).
The month with the least rainy days is August (1.2 days).
Average snowfall days in September
Tracy, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Tracy, CA
- Average daylight in September: 12h and 25min
The month with the longest days is June (Average daylight: 14h and 44min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 24min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Tracy, CA
- Average sunshine days in September: 26.8 days
The month with the most sunshine days is August (28.6 days).
The month with the least sunshine days is March (18.4 days).
Average UV index in September
Tracy, CA
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Tracy, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 36).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in September
Tracy, 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).
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