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 brings an average high-temperature of a still tropical 86.9°F (30.5°C), barely different from August's 90.1°F (32.3°C). Mackenson experiences a significant contrast between daily highs and an average nighttime temperature of 58.1°F (14.5°C) during September.Heat index
September's average heat index is computed to be a hot 89.6°F (32°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.It is crucial to understand that heat index figures are for shade and gentle wind conditions. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Humidity
The least humid month is September, with an average relative humidity of 49%.Rainfall
January through July, September through December are months with rainfall. September is the first month it rains. Throughout September, in the average 1.6 rainfall days, it receives 0.08" (2mm) of precipitation. In Mackenson, during the entire year, the rain falls for 68.7 days and collects up to 11.18" (284mm) of precipitation.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:35 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:50 pm PDT.
Sunshine
In Mackenson, California, the average sunshine in September is 11.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 5 in September translates into these instructions:
Exercise prevention - Protecting skin and eyes from harm is required. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the least humid month?
What is the average humidity in September?
When does it start raining?
How many hours of daylight does Mackenson have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Mackenson have in September?
What is the UV index reading in September?
Average temperature in September
Mackenson, CA
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (55°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is September (58.1°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Mackenson, 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
Mackenson, CA
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in September
Mackenson, CA
- Average humidity in September: 49%
The months with the highest relative humidity are January and March (74%).
The month with the lowest relative humidity is September (49%).
Average rainfall in September
Mackenson, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (2.17").
The driest month (with the least rainfall) is August (0").
Average rainfall days in September
Mackenson, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (13 days).
The month with the least rainy days is August (0.7 days).
Average daylight in September /
Average sunshine in September
Mackenson, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 1min
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 54min).
Average sunshine days in September
Mackenson, CA
- Average sunshine days in September: 27.7 days
The month with the most sunshine days is August (29.9 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in September
Mackenson, 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 January, February, November and December (UV index 3).
Average cloud cover in September
Mackenson, CA
- Average cloud cover in September: 8
The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Mackenson, 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).
Mackenson, California, USA
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