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 snowfall 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
A decrease in the average high-temperature is observed during October, shifting from a tropical 88.2°F (31.2°C) in September to a warm 79°F (26.1°C). During October, the nighttime temperature averages of 57.9°F (14.4°C).Humidity
The average relative humidity in October in Ontario is 45%.Rainfall
In October, in Ontario, California, the rain falls for 3 days. Throughout October, 0.24" (6mm) of precipitation is accumulated. In Ontario, during the entire year, the rain falls for 49.6 days and collects up to 7.8" (198mm) of precipitation.Snowfall
In Ontario, California, snow does not fall in January, March through December.Daylight
In October, the average length of the day is 11h and 19min.On the first day of the month, sunrise is at 6:45 am and sunset at 6:34 pm. On the last day of October, sunrise is at 7:10 am and sunset at 5:58 pm PDT.
Sunshine
In Ontario, California, the average sunshine in October is 8.9h.UV index
In October, the average daily maximum UV index in Ontario is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In October, an average UV index of 5 transforms into the following instructions:
Ensure safety - Recommendations to avert sunburn are presented. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in October in Ontario?
What is the average humidity in October in Ontario?
How many days does it rain in October in Ontario?
When it does not snow in Ontario?
What is the average length of the day in October in Ontario?
When are sunrise and sunset in October in Ontario?
How long on average sun shines in October in Ontario?
What is the UV index intensity in October in Ontario?
Average temperature in October
Ontario, CA
- Average high temperature in October: 79°F
The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is December (62.1°F).
- Average low temperature in October: 57.9°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (45.5°F).
Average pressure in October
Ontario, 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 (29.86"Hg).
Average wind speed in October
Ontario, CA
- Average wind speed in October: 4.8mph
The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in October
Ontario, CA
- Average humidity in October: 45%
The months with the highest relative humidity are March and May (54%).
The month with the lowest relative humidity is August (42%).
Average rainfall in October
Ontario, CA
- Average rainfall in October: 0.24"
The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in October
Ontario, CA
- Average rainfall days in October: 3 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days in October
Ontario, CA
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in October /
Average sunshine in October
Ontario, 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 5min
The month with the most sunshine is 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
Ontario, CA
- Average sunshine days in October: 26.5 days
The month with the most sunshine days is June (28.2 days).
The month with the least sunshine days is February (21.5 days).
Average UV index in October
Ontario, CA
- Average UV index in October: 5
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in October
Ontario, CA
- Average cloud cover in October: 9
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in October
Ontario, 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).
Ontario, California, USA
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