Did you know?

Notes: Probability of later date in spring (thru Jul 31) than indicated. Probability of earlier date in fall (beginning Aug 1) than indicated. Probability of longer than indicated freeze free period. Probability of Freeze/Frost in the yearly period (percent of days with temperatures at or below the threshold temperature).Frost dates are important for gardeners because knowing when they are minimizes the risk of cold weather damaging or killing your plants. The last frost date will guide you about when it’s safest to plant your seeds, and the first frost date will give you an estimated time of when to harvest your plants. Just remember, these dates are just ...Last Frost Date. In Seattle the average date of last frost happens on March 15. In the coldest months of winter you can expect an average low temperature of 15°F. Always keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Seattle and it changes from year to year.The last frost date for an area is the day a region usually has its last frost. The National Weather Service tracks this data and has created charts that show the average last frost dates for various areas. In fact, using any search engine, you can type in the phrase "last frost date by zip" and discover sites where you can find the last ...Planting Guides for Seattle. According to the USDA Seattle is in USDA Zone 8b. Here is some general info for USDA Zone 8b to help you get started. Average Date of Last Frost (spring) March 15. Average Date of First Frost (fall) November 15. Lowest Expected Low. 15°F.A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.The average date of the last frost. The average date of the last frost in spring is a day around which you can plan to start seeds indoors, sow seeds in the garden, and set transplants into the garden. The average date of the last frost in your garden or region is an approximation. It is a date based on an average of the last frost date for ...A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.However, since many people don’t have time to be making calculations, we have put together a short list of some of the most commonly searched last frost locations in the UK, for your convenience. Aberdeen. 1-10 May. Aberystwyth. 11-20 May.First Frost Dates were calculated using daily climate data from the period between 1991-2020. List of Average First Frost Dates for Locations in New York LocationHere are two examples to help you determine your probable last frost and first freeze dates. Example 1 (Last Frost). In the Spring 32° row, if you have "Apr 15" under the 50% column, that means you have a 50% chance of seeing frost on or before April 15th. Example 2 (First Freeze). In the Fall 24° row, if you have "Dec 1" under the 90% column ...What is the last frost date in Seattle? A hard freeze is usually between 28-25 degrees F and a killing freeze is 24 degrees F and below. Frost Date Chart: First and Last Frost Dates Across North America.Seattle Temperature History 2022. The daily range of reported temperatures (gray bars) and 24-hour highs (red ticks) and lows (blue ticks), placed over the daily average high (faint red line) and low (faint blue line) temperature, with 25th to 75th and 10th to 90th percentile bands.Average frost dates-the last frost in spring and the first frost in autumn-can be used to set seed starting dates for the crops you plan to grow. They can also be used to set harvest dates and to plan the extension of the growing season-both early and late. ... Seattle February 23 December 1 281 7B . Spokane April 20 October 12 175 5B ...

A frost date is the average date of the last frost in spring or the first frost in fall or winter. Frost occurs when air temperatures reach freezing: 32° Fahrenheit (0° Centigrade). However, a frost can occur even when air temperatures are just above freezing. Frost can damage young and newly planted plants, the new growth on established ...A strengthening El Niño will make this winter different than last year in part of the United States. It will be colder with plenty more snow for millions of people who live in major cities, but ...The USDA Hardiness Zone Map divides North America into 11 separate planting zones; each growing zone is 10°F warmer (or colder) in an average winter than the adjacent zone. If you see a hardiness zone in a gardening catalog or plant description, chances are it refers to this USDA map. To find your USDA Hardiness Zone, enter your zip code or ...A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The classification of freeze temperatures is based on their effect on plants: Light freeze: 29° to 32°F (-1.7° to 0°C)—tender plants are killed. Moderate freeze: 25° to 28°F (-3.9° to -2.2°C)—widely destructive to most vegetation.

Last Frost Dates were calculated using daily climate data from the period between 1991-2020.Here are two examples to help you determine your probable last frost and first freeze dates. Example 1 (Last Frost). In the Spring 32° row, if you have "Apr 15" under the 50% column, that means you have a 50% chance of seeing frost on or before April 15th. Example 2 (First Freeze).…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. A frost date is the average date of the last light freeze i. Possible cause: A frost date is the average date of the last light freeze in spring or th.