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
The initiation of September records an average high-temperature of a warm 85.1°F (29.5°C), displaying a near consistency with the previous month. Guatay anticipates a considerable drop in temperature at night in September, with an average low of 62.6°F (17°C).Heat index
September's average heat index is computed to be a tropical 86°F (30°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.Realize that the values for the heat index are set for shaded places and light winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Humidity
In September, the average relative humidity is 46%.Rainfall
In September, the rain falls for 5.6 days. Throughout September, 0.71" (18mm) of precipitation is accumulated. In Guatay, during the entire year, the rain falls for 67.3 days and collects up to 9.57" (243mm) of precipitation.Snowfall
In Guatay, snow does not fall in April through October.Daylight
In Guatay, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:21 am and sunset at 7:10 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:31 pm PDT.
Sunshine
In September, the average sunshine is 10.3h.UV index
In Guatay, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 6 during September leads to these instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in Guatay in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September in Guatay?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Guatay, CA
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is August (89.2°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 (66.4°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in September
Guatay, CA
- Average pressure in September: 29.85"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are June and September (29.85"Hg).
Average wind speed in September
Guatay, CA
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are April and May (7.2mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Guatay, CA
- Average humidity in September: 46%
The months with the highest relative humidity are March and May (55%).
The month with the lowest relative humidity is August (43%).
Average rainfall in September
Guatay, CA
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is February (1.69").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Guatay, CA
- Average rainfall days in September: 5.6 days
The month with the highest number of rainy days is July (8.6 days).
The month with the least rainy days is June (1.8 days).
Average snowfall in September
Guatay, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Guatay, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Guatay, 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 June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Guatay, CA
- Average sunshine days in September: 22.7 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is July (18.8 days).
Average UV index in September
Guatay, CA
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Guatay, CA
- Average cloud cover in September: 9
The month with the most cloud cover is December (Cloud cover 28).
The months with the least cloud cover are June and August (Cloud cover 7).
Average visibility in September
Guatay, 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).
Guatay, California, USA
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