Contents
- Weather in March
- Frequently asked questions
- Average temperature in March
- Average pressure in March
- Average wind speed in March
- Average humidity in March
- Average rainfall in March
- Average rainfall days in March
- Average snowfall days in March
- Average daylight in March
- Average sunshine in March
- Average sunshine days in March
- Average UV index in March
- Average cloud cover in March
- Average visibility in March
Weather in March
Temperature
Transitioning into March, Ontario experiences an average high-temperature of an agreeable 68.4°F (20.2°C), marking a minor shift from the preceding month. The average low-temperature, in March, in Ontario, California, is a chilly 46.9°F (8.3°C).Humidity
March and May, with an average relative humidity of 54%, are the most humid months in Ontario.Rainfall
In March, in Ontario, the rain falls for 7.1 days. Throughout March, 0.79" (20mm) 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
January, March through December are months without snowfall in Ontario.Daylight
In March, the average length of the day in Ontario, California, is 12h and 0min.On the first day of the month, sunrise is at 6:18 am and sunset at 5:47 pm PST. On the last day of March, in Ontario, California, sunrise is at 6:37 am and sunset at 7:11 pm PDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from PDT to PST.
Sunshine
In Ontario, the average sunshine in March is 9h.UV index
In Ontario, the average daily maximum UV index in March is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 5 in March translates into these instructions:
Ensure safety - Sun damage prevention is strongly urged. Around midday, solar radiation is most harmful; hence, exposure should be limited. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in March in Ontario?
What is the most humid month in Ontario?
What is the average humidity in March in Ontario?
How many days does it rain in March in Ontario?
When it does not snow in Ontario?
Does it snow in Ontario in March?
How many hours of daylight does Ontario have in March?
What time are sunrise and sunset in March in Ontario?
When does Daylight Saving Time (DST) start in March in Ontario?
How many hours of sunshine does Ontario have in March?
How high is the UV index in March in Ontario?
Average temperature in March
Ontario, CA
- Average high temperature in March: 68.4°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 March: 46.9°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 March
Ontario, CA
- Average pressure in March: 30.02"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 March
Ontario, CA
- Average wind speed in March: 5.2mph
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 March
Ontario, CA
- Average humidity in March: 54%
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 March
Ontario, CA
- Average rainfall in March: 0.79"
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 March
Ontario, CA
- Average rainfall days in March: 7.1 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 March
Ontario, CA
- Average snowfall days in March: 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 March /
Average sunshine in March
Ontario, CA
- Average daylight in March: 12h and 0min
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 March: 9h and 0min
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 March
Ontario, CA
- Average sunshine days in March: 23.6 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 March
Ontario, CA
- Average UV index in March: 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 March
Ontario, CA
- Average cloud cover in March: 20
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 March
Ontario, CA
- Average visibility in March: 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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