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
The dawn of October sees an average high-temperature of a still comfortable 64.6°F (18.1°C), subtly contrasting with September's 66.9°F (19.4°C). Nighttime temperatures in Half Moon Bay record an average of 55.9°F (13.3°C) throughout October.Humidity
In October, the average relative humidity is 74%.Rainfall
In Half Moon Bay, in October, it is raining for 4.9 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, there are 76.8 rainfall days, and 8.54" (217mm) of precipitation is accumulated.Daylight
In Half Moon Bay, the average length of the day in October is 11h and 13min.On the first day of the month, sunrise is at 7:05 am and sunset at 6:52 pm. On the last day of October, sunrise is at 7:34 am and sunset at 6:12 pm PDT.
Sunshine
In October, the average sunshine is 6.9h.UV index
January through May, July, October through December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 4 during October translates into these guidelines:
Undertake precautions - Guarding against sun damage is counselled. The solar radiation around mid-day is intense; avoid the Sun and stay safe. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average October temperature in Half Moon Bay?
What is the average humidity in October?
How many days does it rain in October?
What is the average length of the day in October?
When are sunrise and sunset in October?
How many hours of sunshine does Half Moon Bay have in October?
When is the lowest UV index?
What is the UV index reading in October?
Average temperature in October
Half Moon Bay, CA
- Average high temperature in October: 64.6°F
The warmest month (with the highest average high temperature) is September (66.9°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in October: 55.9°F
The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).
Average pressure in October
Half Moon Bay, CA
- Average pressure in October: 29.99"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in October
Half Moon Bay, CA
- Average wind speed in October: 7.1mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in October
Half Moon Bay, CA
- Average humidity in October: 74%
The month with the highest relative humidity is August (82%).
The months with the lowest relative humidity are November and December (72%).
Average rainfall in October
Half Moon Bay, CA
- Average rainfall in October: 0.43"
The wettest month (with the highest rainfall) is February (1.61").
The driest months (with the least rainfall) are June and July (0.12").
Average rainfall days in October
Half Moon Bay, CA
- Average rainfall days in October: 4.9 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is June (3 days).
Average daylight in October /
Average sunshine in October
Half Moon Bay, CA
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in October: 6h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in October
Half Moon Bay, CA
- Average sunshine days in October: 24.6 days
The month with the most sunshine days is October (24.6 days).
The months with the least sunshine days are March and August (18.8 days).
Average UV index in October
Half Moon Bay, CA
- Average UV index in October: 4
The months with the highest UV index are June, August and September (UV index 5).
The months with the lowest UV index are January, February, March, April, May, July, October, November and December (UV index 4).
Average cloud cover in October
Half Moon Bay, CA
- Average cloud cover in October: 20
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 18).
Average visibility in October
Half Moon Bay, 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).
Half Moon Bay, California, USA
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