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, known for its average high temperature of 79.5°F (26.4°C) and an average low temperature of 59.9°F (15.5°C), is the warmest month.Humidity
The average relative humidity in September is 59%.Rainfall
In Grover Beach, in September, it is raining for 1.8 days, with typically 0.08" (2mm) of accumulated precipitation. In Grover Beach, during the entire year, the rain falls for 47.6 days and collects up to 6.93" (176mm) of precipitation.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:47 pm PDT.
Sunshine
In September, the average sunshine is 11.3h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months?
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
How many hours of daylight does Grover Beach have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Grover Beach have in September?
What is the UV index intensity in September in Grover Beach?
Average temperature in September
Grover Beach, CA
- Average high temperature in September: 79.5°F
The warmest month (with the highest average high temperature) is September (79.5°F).
The month with the lowest average high temperature is December (61.2°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in September
Grover Beach, 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
Grover Beach, CA
- Average wind speed in September: 5.8mph
The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Grover Beach, CA
- Average humidity in September: 59%
The month with the highest relative humidity is March (68%).
The month with the lowest relative humidity is October (58%).
Average rainfall in September
Grover Beach, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is March (1.61").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in September
Grover Beach, CA
- Average rainfall days in September: 1.8 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is August (0.8 days).
Average daylight in September /
Average sunshine in September
Grover Beach, 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
Grover Beach, CA
- Average sunshine days in September: 28.2 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is February (21 days).
Average UV index in September
Grover Beach, CA
- Average UV index in September: 5
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Grover Beach, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
Grover Beach, 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).
Grover Beach, California, USA
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