Growing Degree Days and Frost Dates for Any US Location
Pricing
$10.00 / 1,000 results
Growing Degree Days and Frost Dates for Any US Location
Degree days so far this season vs the 1991-2020 average, plus average last spring and first fall freeze dates from the nearest long-record station.
Pricing
$10.00 / 1,000 results
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Standard Work Co.
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2
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1
Monthly active users
7 days ago
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Informational only. Not for navigation, safety, emergency, financial, medical, or legal decisions. Check the official source before you rely on it.
Enter a latitude and longitude. The tool finds the nearest weather station with daily records since 1991 and returns, in one row: growing degree days so far this season and the 1991-2020 average for the same dates, plus average last spring and first fall freeze dates (median, early 10 percent and late 90 percent), the median growing season length, and this year's last spring and first fall freeze so far.
What you get
- Station used, its distance, state and elevation.
- Degree days this season (simple or corn 86/50 method, any base from 32 to 60 F), the 1991-2020 average for the same window, the difference and percent of average, and missing days.
- Last spring and first fall freeze dates at 24, 28, 32 or 36 F: median, early (10th percentile) and late (90th percentile), from 1991-2020.
- Median growing season length, years used, and years with no freeze.
- Self-check fields (qcStatus, qcNotes) and an error field.
How to use (no code)
- Enter your place and its latitude and longitude.
- Pick the degree day base, method and season start, and the freeze threshold.
- Click Start. It takes a few seconds. Schedule it weekly to track a season.
Method and limits
Daily degree days are rounded to whole numbers, the same way RCC-ACIS reports them. Missing days count as zero and are flagged above 3. Freeze statistics use years with no more than 10 missing days in that half-year; years with no freeze at the chosen threshold are counted and left out of the dates. A station's frost dates can differ from a nearby garden by days, especially in valleys and cities.
Disclaimer
Informational only. Not for navigation, safety, emergency, financial, medical, or legal decisions. Check the official source before you rely on it. This is an independent tool by Standard Work Co. It is not affiliated with, endorsed by, or sponsored by any government agency or climate center named here. Names are used only to say where the data comes from. The data comes from public sources and is passed through as published, only reformatted and summarized. Data can be preliminary, late, missing, revised, or wrong, and this tool can fail too. Provided "as is" with no warranty of any kind, including accuracy, completeness, or timeliness. Liability is limited as stated in the Apify Standard Actor Contract for this tool. Degree days and frost dates: Weather and climate data are preliminary and can change after quality control. Estimates only. Not a guarantee of crop timing or frost dates.
Data sources and credits
Daily station data from the Applied Climate Information System (RCC-ACIS), operated by the NOAA Regional Climate Centers. Use is subject to the RCC-ACIS Terms of Use and Disclaimer.
