October weather forecastIrvine, CA
October
Weather in October
As the heat of summer completely subsides, October in Irvine greets residents and visitors with milder temperatures and a notable surge in rainfall compared to the drier September. The atmosphere in October is typically characterized by a slight chill and shorter daylight hours. This is a time when the city starts to prepare for the celebratory end of year season. Fall foliage enhances the city’s aesthetic appeal multi-fold. The arrival of pumpkins, apples, and fall festivities define October in Irvine.Temperature
Transitioning into October, Irvine records an average high-temperature of a still warm 74.7°F (23.7°C), almost identical to September's 79°F (26.1°C). Nighttime temperature dips to a mean of 61.5°F (16.4°C) during October.Humidity
The average relative humidity in October is 61%.Rainfall
In Irvine, in October, during 5.1 rainfall days, 0.39" (10mm) of precipitation is typically accumulated. In Irvine, California, during the entire year, the rain falls for 63.7 days and collects up to 7.91" (201mm) of precipitation.Daylight
In October, the average length of the day in Irvine is 11h and 20min.On the first day of October, sunrise is at 6:46 am and sunset at 6:35 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:59 pm PDT.
Sunshine
In Irvine, the average sunshine in October is 8.5h.UV index
In Irvine, the average daily maximum UV index in October is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In October, a regular UV index of 5 translates into these guidelines:
Exercise prevention - Precautions against solar damage are endorsed. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Irvine, CA
- Average high temperature in October: 74.7°F
The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is December (63°F).
- Average low temperature in October: 61.5°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).
Average pressure in October
Irvine, CA
- Average pressure in October: 29.94"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in October
Irvine, CA
- Average wind speed in October: 4.8mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (4.8mph).
Average humidity in October
Irvine, CA
- Average humidity in October: 61%
The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (56%).
Average rainfall in October
Irvine, CA
- Average rainfall in October: 0.39"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in October
Irvine, CA
- Average rainfall days in October: 5.1 days
The month with the highest number of rainy days is March (7.9 days).
The month with the least rainy days is June (2.2 days).
Average daylight in October /
Average sunshine in October
Irvine, 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: 10h and 0min).
- Average sunshine in October: 8h and 30min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in October
Irvine, CA
- Average sunshine days in October: 23.3 days
The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is May (19.7 days).
Average UV index in October
Irvine, 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
Irvine, CA
- Average cloud cover in October: 14
The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in October
Irvine, 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).
