Canadian gardeners need to know when the growing season in their area begins and ends so they can avoid losing plants to frost. That signals the beginning of fall garden cleanup. OTTAWA -- Cover those plants up, if you haven’t already. Average Last Frost Date: January 15th - January 30th By working out your first dates ahead of planting, you’ll be giving your seedlings a much better chance of survival and helping them grow into strong, healthy plants that will provide you with a bounty of crops. ... 2021 … Station Status. Times are presented in US Central Standard Time. Custom programming and server maintenance by, NOAA National Centers for Environmental Information. Schedule 2. The actual frost date can fluctuate by a month or more. This is because last frost dates are based on information gathered from historical meteorological reports. This chart provides frost dates across Canada. Learn how to protect plants from frost. Ottawa Weather History for the Previous 24 Hours Show weather for: Previous 24 hours April 26, 2021 April 25, 2021 April 24, 2021 April 23, 2021 April 22, 2021 April 21, 2021 April 20, 2021 April 19, 2021 April 18, 2021 April 17, 2021 April 16, 2021 April 15, 2021 April 14, 2021 April 13, 2021 April 12, 2021 April 11, 2021 This big swing can also be seen from East to West as Detroit is listed as April 30 for average last frost. The classification of freeze temperatures is based on their effect on plants: Note that frost dates are only an estimate based on historical climate data and are not set in stone. Now that you know your frost dates, use our Garden Planting Calendar for Ottawa, ON to know when to sow and transplant your various vegetable plants! You can use these more specific ranges to maximize your gardening time during the year by … These dates will be different if you live outside of the Vancouver area. ... 2021 National Gardening Association. The map identifies the 30-year average date after which there are no freezing temperatures until the return of cold temperatures in the fall. OTTAWA -- You will want to cover up the plants and shrubs you planted over the weekend. ... between March 1, 2021 to April 30, 2021. Request a demo with one of our reps, let us know what date and time is convenient for you. First and last freeze/frost dates for Ottawa, IL ,United States. Last Frost Date. Last and first frost dates are 33% probability. 11 - Jun. Illinois Frost Dates and Growing Season Dr. Jim Angel, State Climatologist. Knowing local frost dates can improve your gardening by giving you an idea of when to start seeds indoors and outdoors, when to … The last frost date is the one vegetable gardeners need to pay attention to in spring. Our frost date calculator will tell you precisely when your garden in Ottawa, ON is at risk for frost. The first average frost date of autumn falls on November 2 in Vancouver. A frost can damage newly planted growth and even some established plants, so you want to be sure you are past the date (for spring) or … The last frost date is the latest date that a light or hard frost was recorded 90 percent of the time. Map of projected climate change in Canada. Other sources may define the "last frost date" as the average date. Canada’s 2021 Extended Forecast: A Winter Divided Every year since 1818, we have provided long-range weather predictions that help you plan ahead. The table (below) of average first frost/freeze dates has been updated for the 1981-2010 normals. BONUS: You’ll also receive our Almanac Companion newsletter! 20: Zone 17 Jun. Microclimates and altitude also influence frost dates. It tells you when is the last date in the spring your area is likely to get frost — generally 36 or so degrees. Data is provided by the NOAA National Centers for Environmental Information. The term "frost dates" is shorthand for when the last frost will occur in the spring and when the first frost will happen in the fall or winter. Last Frost First Frost; Barrie: May 11-20: October 1-10: Hamilton: May 1-10: October 11-20: Kingston: April 21-30: October 1-10: London: May 1-10: October 1-10: Ottawa: May 1-10: October 1-10: Owen Sound: May 1-10: October 1-10: Parry Sound: May 21-31: September 11-20: Peterborough: May 1-10: September 21-30: St. Catharines: May 21-30: November 1-10: Sudbury: May 11-20: September 21-30: Thunder Bay: … Enter a GA ZIP Code to check three nearest stations. The last frost date for the Vancouver, BC area is March 28. Your results. Scroll down further to find two tables, each giving the estimated dates for 90%, 50%, and 10% chance of frost before the first frost date or after the last frost date of the year. click on H if your town is Harrogate). Therefore, climatologists rely on past temperature observations to calculate the historical probability of freezing temperatures occurring after (spring) or before (fall) certain dates. 20: Zone 13 Jun. Frost dates are calculated based on data from the NOAA National Centers for Environmental Information. A blue-shaded date indicates that the last spring frost/freeze/hard freeze of 2020 occurred at least 10 days LATER than the 30-year average , while red-shaded dates indicate a last spring frost/freeze/hard freeze that was at least 10 days EARLIER than the 30-year average . Weather, topography, and microclimates may also cause considerable variations in the occurrence of frost in your garden. The final column is a recap of LAST SPRING (2020), showing the actual last dates that 28°, 32° and 36° were observed. Narrow your search by clicking on the the first letter of your town (e.g. 30 Photography by Garden.org member TBGDN. 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