Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average sea temperature in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
With the onset of October, Hercules's climate undergoes a slight change as the average high-temperature moves from a warm 77.5°F (25.3°C) in September to an agreeable 71.4°F (21.9°C). Throughout October, the temperature in Hercules tends to fall to a consistent average low of 54.7°F (12.6°C).Humidity
The months with the lowest humidity are September and October, with an average relative humidity of 63%.Rainfall
In Hercules, during October, the rain falls for 5.1 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Hercules, during the entire year, the rain falls for 72.2 days and collects up to 12.83" (326mm) of precipitation.Ocean temperature
In October, the average ocean temperature is 56.8°F (13.8°C).Note: Diving into 56.8°F (13.8°C) is practical below 50°F (10°C), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 55.4°F (13°C) feels ice-cold.
Daylight
In Hercules, the average length of the day in October is 11h and 11min.On the first day of the month, sunrise is at 7:05 am and sunset at 6:51 pm. On the last day of October, in Hercules, sunrise is at 7:34 am and sunset at 6:10 pm PDT.
Sunshine
In October, the average sunshine is 7h.UV index
In October, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 during October translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. 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
What are the temperatures in Hercules in October?
What is the least humid month in Hercules?
What is the average humidity in October in Hercules?
How many days does it rain in October in Hercules?
What is the water temperature in October in Hercules?
What is the average length of the day in October in Hercules?
What time are sunrise and sunset in October in Hercules?
How long on average sun shines in October in Hercules?
What is the UV index reading in October in Hercules?
Average temperature in October
Hercules, CA
- Average high temperature in October: 71.4°F
The warmest month (with the highest average high temperature) is September (77.5°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in October: 54.7°F
The month with the highest average low temperature is August (56.8°F).
The coldest months (with the lowest average low temperature) are January and December (43.9°F).
Average pressure in October
Hercules, CA
- Average pressure in October: 29.98"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in October
Hercules, CA
- Average wind speed in October: 5.2mph
The windiest month (with the highest average wind speed) is May (7.5mph).
The calmest month (with the lowest average wind speed) is November (4.8mph).
Average humidity in October
Hercules, CA
- Average humidity in October: 63%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (63%).
Average rainfall in October
Hercules, CA
- Average rainfall in October: 0.59"
The wettest month (with the highest rainfall) is February (2.76").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in October
Hercules, CA
- Average rainfall days in October: 5.1 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (1.1 days).
Average sea temperature in October
Hercules, CA
- Average sea temperature in October: 56.8°F
The best month for swimming (with the highest average sea temperature) is September (57°F).
The coldest month (with the lowest average sea temperature) is April (52.6°F).
Average daylight in October /
Average sunshine in October
Hercules, CA
- Average daylight in October: 11h and 1min
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 October: 7h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in October
Hercules, CA
- Average sunshine days in October: 24.4 days
The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (16.4 days).
Average UV index in October
Hercules, CA
- Average UV index in October: 4
The months with the highest UV index are April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in October
Hercules, CA
- Average cloud cover in October: 18
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in October
Hercules, CA
- Average visibility in October: 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).
Hercules, California, USA
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