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
September observes an average high-temperature of a still moderately hot 79.9°F (26.6°C), marking an insignificant difference from August's 80.2°F (26.8°C). During September, the temperature is averaged to a low of 60.3°F (15.7°C) at night.Humidity
The months with the lowest humidity are September and October, with an average relative humidity of 57%.Rainfall
In Port San Luis, in September, it is raining for 1.8 days, with typically 0.12" (3mm) of accumulated precipitation. In Port San Luis, during the entire year, the rain falls for 57 days and collects up to 9.57" (243mm) of precipitation.Daylight
In Port San Luis, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:47 pm PDT.
Sunshine
The average sunshine in September in Port San Luis, California, is 11.3h.UV index
In Port San Luis, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Exercise prevention - Precautions against solar damage are endorsed. When the Sun is at its strongest around midday, find shade and limit exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Frequently asked questions
What is the average September temperature in Port San Luis?
What are the least humid months in Port San Luis?
What is the average humidity in September in Port San Luis?
How much does it rain in Port San Luis in September?
How many hours of daylight does Port San Luis have in September?
When are sunrise and sunset in September in Port San Luis?
How long on average sun shines in September in Port San Luis?
How high is the UV index in September in Port San Luis?
Average temperature in September
Port San Luis, CA
- Average high temperature in September: 79.9°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (60.3°F).
- Average low temperature in September: 60.3°F
The month with the highest average low temperature is September (60.3°F).
The coldest month (with the lowest average low temperature) is February (45.7°F).
Average pressure in September
Port San Luis, CA
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in September
Port San Luis, CA
- Average wind speed in September: 5.3mph
The windiest months (with the highest average wind speed) are April and May (6.8mph).
The calmest months (with the lowest average wind speed) are August and September (5.3mph).
Average humidity in September
Port San Luis, CA
- Average humidity in September: 57%
The month with the highest relative humidity is March (69%).
The months with the lowest relative humidity are September and October (57%).
Average rainfall in September
Port San Luis, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is March (2.01").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in September
Port San Luis, CA
- Average rainfall days in September: 1.8 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is August (0.6 days).
Average daylight in September /
Average sunshine in September
Port San Luis, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 11h and 2min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).
Average sunshine days in September
Port San Luis, CA
- Average sunshine days in September: 27.9 days
The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is February (19.1 days).
Average UV index in September
Port San Luis, CA
- Average UV index in September: 5
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is February (UV index 3).
Average cloud cover in September
Port San Luis, CA
- Average cloud cover in September: 6
The month with the most cloud cover is March (Cloud cover 28).
The months with the least cloud cover are August and September (Cloud cover 6).
Average visibility in September
Port San Luis, 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).
Port San Luis, California, USA
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