custom location - Weather History and Averages

• Latitude: 33.975
• Longitude: -117.636

High Temperatures

On average, the day with the warmest high temperature in custom location is August 28 at an average of 95.0 °F (35.0 °C).

On average, the day with the coldest high temperature in custom location is December 29 at an average of 65.6 °F (18.6 °C).

Records

The warmest recorded high temperature in custom location was 120.9 °F (49.4 °C) on June 25 in the year 1974 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .

The coldest recorded high temperature in custom location was 44.6 °F (7.0 °C) on February 23 in the year 2023 at CABLE — Integrated Surface Dataset (ISD) station ID: 720329 .

Low Temperatures

On average, the day with the warmest low temperature in custom location is September 4 at an average of 64.4 °F (18.0 °C).

On average, the day with the coldest low temperature in custom location is December 27 at an average of 40.9 °F (4.9 °C).

Records

The warmest recorded low temperature in custom location was 105.1 °F (40.6 °C) on September 1 in the year 1987 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .

The coldest recorded low temperature in custom location was 19.4 °F (-7.0 °C) on January 14 in the year 2007 at CORONA MUNI — Integrated Surface Dataset (ISD) station ID: 720333 .

Freeze

When you are gardening in custom location, consider the chance that the weather may freeze and harm your plants. There is a greater than 5% chance of temperatures dropping below freezing in 22 of 366 days per year in custom location.

According to the USA National Weather Service:

Freeze occurs when the temperature drops to 32° Fahrenheit or lower. A freeze will result in significant damage to many unprotected plants, especially if the temperature remains at-or-below freezing for several hours.

Last freeze

In custom location during the spring season, the average last freeze date is January 15. Expect^* the last freeze date after

• February 1 in one of every two years (50%),
• March 6 in one of every ten years (10%),
• March 17 in one of every twenty years (5%),
• April 9 in one of every hundred years (1%).

First freeze

In custom location during the autumn (fall) season, the average first freeze date is December 21. Expect^* the first freeze date before

• December 14 in one of every two years (50%),
• November 20 in one of every ten years (10%),
• November 15 in one of every twenty years (5%),
• November 4 in one of every hundred years (1%).

Hard Freeze

According to the USA National Weather Service:

Hard freeze typically occurs when the temperature reaches 28° Fahrenheit or lower for at least an hour (or more). This usually means that most seasonal vegetation will be destroyed. In addition, there is a possibility of damage to unprotected outdoor plumbing/un-drained sprinkler systems etc.

Last hard freeze

In custom location during the spring season, the average last hard freeze date is no freezing temperatures all season. Expect^* the last hard freeze date after

• December 16 in one of every two years (50%),
• February 1 in one of every ten years (10%),
• February 14 in one of every twenty years (5%),
• March 5 in one of every hundred years (1%).

First hard freeze

In custom location during the autumn (fall) season, the average first hard freeze date is no freezing temperatures all season. Expect^* the first hard freeze date before

• January 21 in one of every two years (50%),
• December 12 in one of every ten years (10%),
• December 2 in one of every twenty years (5%),
• November 16 in one of every hundred years (1%).

Frost

Frost can happen at temperatures above freezing and damage delicate plants. According to the USA National Weather Service:

Frost occurs when there is a solid deposition of water vapor from the air. Frost will form when solid surfaces are cooled below the dew point. An air temperature range of 33°- 36° Fahrenheit (or colder), along with light winds, is usually needed to initiate frost formation. At least minor damage is possible to plants. One must keep in mind that frost is not guaranteed if the air is very dry and/or winds are roughly 8+ MPH.

Last frost

In custom location during the spring season, the average last frost date is March 13. Expect^* the last frost date after

• March 9 in one of every two years (50%),
• April 9 in one of every ten years (10%),
• April 18 in one of every twenty years (5%),
• April 27 in one of every hundred years (1%).

First frost

In custom location during the autumn (fall) season, the average frost date is November 26. Expect^* the first frost date before

• November 23 in one of every two years (50%),
• November 6 in one of every ten years (10%),
• November 3 in one of every twenty years (5%),
• October 29 in one of every hundred years (1%).

Details

If you would like to see the temperatures for specific days, you can click on the corresponding links below: