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 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
Port Costa's transition into October involves a gentle shift in temperature, receding from a warm 80.1°F (26.7°C) in September to a pleasant 72.9°F (22.7°C). Port Costa, during October nights, observes an average temperature of 54°F (12.2°C).Humidity
The months with the lowest humidity are September and October, with an average relative humidity of 60%.Rainfall
In Port Costa, California, during October, the rain falls for 3.4 days and regularly aggregates up to 0.2" (5mm) of precipitation. In Port Costa, during the entire year, the rain falls for 56.9 days and collects up to 4.88" (124mm) of precipitation.Daylight
In October, the average length of the day in Port Costa, California, 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, sunrise is at 7:34 am and sunset at 6:10 pm PDT.
Sunshine
The average sunshine in October is 7h.UV index
The average daily maximum UV index in October is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 in October translates into this advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Frequently asked questions
What are October temperatures in Port Costa?
What are the least humid months in Port Costa?
What is the average humidity in October in Port Costa?
How many days does it rain in October in Port Costa?
How many hours of daylight does Port Costa have in October?
When is the sunrise / sunset in October in Port Costa?
How long on average sun shines in October in Port Costa?
What is the UV index intensity in October in Port Costa?
Average temperature in October
Port Costa, CA
- Average high temperature in October: 72.9°F
The warmest months (with the highest average high temperature) are July and September (80.1°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in October: 54°F
The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is January (43°F).
Average pressure in October
Port Costa, CA
- Average pressure in October: 29.98"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 October
Port Costa, CA
- Average wind speed in October: 5mph
The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).
Average humidity in October
Port Costa, CA
- Average humidity in October: 60%
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are September and October (60%).
Average rainfall in October
Port Costa, CA
- Average rainfall in October: 0.2"
The wettest month (with the highest rainfall) is February (1.14").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in October
Port Costa, CA
- Average rainfall days in October: 3.4 days
The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.9 days).
Average daylight in October /
Average sunshine in October
Port Costa, 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: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in October
Port Costa, CA
- Average sunshine days in October: 25.5 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (18.8 days).
Average UV index in October
Port Costa, CA
- Average UV index in October: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in October
Port Costa, CA
- Average cloud cover in October: 17
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in October
Port Costa, 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).
Port Costa, California, USA
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