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 transition into October is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 84.6°F (29.2°C) in September to a still warm 76.8°F (24.9°C). Throughout October, a steady low-temperature average of 57.9°F (14.4°C) is noted.Humidity
In October, the average relative humidity is 47%.Rainfall
In Altadena, in October, it is raining for 2.9 days, with typically 0.24" (6mm) of accumulated precipitation. In Altadena, during the entire year, the rain falls for 52 days and collects up to 8.82" (224mm) of precipitation.Daylight
In October, the average length of the day is 11h and 19min.On the first day of October, sunrise is at 6:47 am and sunset at 6:36 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:00 pm PDT.
Sunshine
In October, the average sunshine in Altadena is 8.6h.UV index
In October, the average daily maximum UV index in Altadena, California, is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In October, a regular UV index of 5 translates into these guidelines:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Frequently asked questions
What is the temperature in October in Altadena?
What is the average humidity in October in Altadena?
How much does it rain in Altadena in October?
What is the average length of the day in October in Altadena?
When is the sunrise / sunset in October in Altadena?
How long on average sun shines in October in Altadena?
What is the UV index reading in October in Altadena?
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 2min
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 4min
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).
Altadena, California, USA
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