October weather forecastAltadena, CA
October
Weather in October
October, like September, in Altadena, California, is another warm autumn month, with temperature in the range of an average high of 76.8°F (24.9°C) and an average low of 57.9°F (14.4°C).Temperature
As September shifts into October, a minor alteration in temperatures is observed, with average highs reducing from a moderately hot 84.6°F (29.2°C) to a still warm 76.8°F (24.9°C). Altadena experiences an average low-temperature of 57.9°F (14.4°C) in month of October.Humidity
In Altadena, the average relative humidity in October is 47%.Rainfall
In Altadena, in October, it is raining for 2.9 days, with typically 0.24" (6mm) of accumulated precipitation. Throughout the year, there are 52 rainfall days, and 8.82" (224mm) of precipitation is accumulated.Daylight
In Altadena, the average length of the day in October is 11h and 19min.On the first day of the month, sunrise is at 6:47 am and sunset at 6:36 pm. On the last day of October, sunrise is at 7:12 am and sunset at 6:00 pm PDT.
Sunshine
In Altadena, the average sunshine in October is 8.6h.UV index
In Altadena, the average daily maximum UV index in October is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 5 during October translates into the following guidance:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Altadena, CA
- Average high temperature in October: 76.8°F
The warmest month (with the highest average high temperature) is August (86.2°F).
The month with the lowest average high temperature is December (61°F).
- Average low temperature in October: 57.9°F
The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).
Average pressure in October
Altadena, CA
- Average pressure in October: 29.95"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in October
Altadena, CA
- Average wind speed in October: 4.7mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in October
Altadena, CA
- Average humidity in October: 47%
The months with the highest relative humidity are March, May and June (56%).
The month with the lowest relative humidity is November (46%).
Average rainfall in October
Altadena, CA
- Average rainfall in October: 0.24"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in October
Altadena, CA
- Average rainfall days in October: 2.9 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.3 days).
Average daylight in October /
Average sunshine in October
Altadena, CA
- Average daylight in October: 11h and 18min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in October: 8h and 36min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).
Average sunshine days in October
Altadena, CA
- Average sunshine days in October: 26.6 days
The month with the most sunshine days is June (27.2 days).
The month with the least sunshine days is February (21.3 days).
Average UV index in October
Altadena, CA
- Average UV index in October: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in October
Altadena, CA
- Average cloud cover in October: 9
The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in October
Altadena, 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).
