October weather forecastSan Marcos, CA
October
Weather in October
October, like September, in San Marcos, California, is another warm autumn month, with an average temperature fluctuating between 75.4°F (24.1°C) and 58.8°F (14.9°C).Temperature
As September transitions into October, San Marcos sees a gentle drop in the average high-temperature, transitioning from 80.8°F (27.1°C) to a still moderately hot 75.4°F (24.1°C). San Marcos's temperature lowers to a mean of 58.8°F (14.9°C) during the nights in October.Humidity
In San Marcos, the average relative humidity in October is 61%.Rainfall
In San Marcos, during October, the rain falls for 3.5 days and regularly aggregates up to 0.2" (5mm) of precipitation. In San Marcos, California, during the entire year, the rain falls for 52.1 days and collects up to 6.1" (155mm) of precipitation.Daylight
In October, the average length of the day is 11h and 20min.On the first day of the month, sunrise is at 6:43 am and sunset at 6:32 pm. On the last day of October, in San Marcos, sunrise is at 7:06 am and sunset at 5:57 pm PDT.
Sunshine
In October, the average sunshine in San Marcos is 8.9h.UV index
The average daily maximum UV index in October is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average UV index of 5 in October transforms into this advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
San Marcos, CA
- Average high temperature in October: 75.4°F
The warmest month (with the highest average high temperature) is August (81.9°F).
The months with the lowest average high temperature are February and December (63.3°F).
- Average low temperature in October: 58.8°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (48°F).
Average pressure in October
San Marcos, CA
- Average pressure in October: 29.93"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in October
San Marcos, CA
- Average wind speed in October: 4.4mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is October (4.4mph).
Average humidity in October
San Marcos, CA
- Average humidity in October: 61%
The month with the highest relative humidity is May (70%).
The month with the lowest relative humidity is November (56%).
Average rainfall in October
San Marcos, CA
- Average rainfall in October: 0.2"
The wettest month (with the highest rainfall) is December (1.22").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in October
San Marcos, CA
- Average rainfall days in October: 3.5 days
The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (1.2 days).
Average daylight in October /
Average sunshine in October
San Marcos, CA
- Average daylight in October: 11h and 18min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in October: 8h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in October
San Marcos, CA
- Average sunshine days in October: 25 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is February (20 days).
Average UV index in October
San Marcos, CA
- Average UV index in October: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in October
San Marcos, CA
- Average cloud cover in October: 12
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in October
San Marcos, 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).
