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Frost dates and the length of the growing season
Frost dates and the length of the growing season: this guide has a section for each municipality: the median and the risk-averse tenth-percentile date of…
This launch guide maps the topic, the source base and the practical questions. Check the linked official authority before acting on a rule, deadline, price or safety requirement.
What this guide covers
This guide has a section for each municipality: the median and the risk-averse tenth-percentile date of the last spring frost and the first autumn frost, the frost-free day count, the difference between air frost and ground frost that catches gardeners out, the local frost pockets, and what to cover on the night. The results today are a US hardiness map that does not describe a Baltic May at all. A focused example is "last frost in Viljandi county".
How to use it
Use Frost dates and the length of the growing season to compare stable place facts and official facilities. Live opening, access and disruption information should always be confirmed with the operator before travel.
The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.
Search vocabulary in four languages
Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.
| Language | Example phrase |
|---|---|
| Estonian | millal on viimane öökülm |
| Finnish | milloin hallat loppuvat keväällä |
| Russian | когда заканчиваются заморозки весной |
| English | last spring frost date Estonia |
Evidence and provenance
The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.
Source: computed from the open station series of Riigi Ilmateenistus, FMI (CC BY 4.0) and LVGMC; the station-to-municipality mapping is published with the page. · checked 2026-09-09
Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.
Scope and boundaries
the sowing calendar says when to sow; this supplies the local frost dates that decision depends on, with their uncertainty.
Connected TempoLife guides
The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.
Why it belongs on TempoLife
/sowing-calendar.
Frequently asked questions
What does this guide cover?
This guide has a section for each municipality: the median and the risk-averse tenth-percentile date of the last spring frost and the first autumn frost, the frost-free day count, the difference between air frost and ground frost that catches gardeners out, the local frost pockets, and what to cover on the night. The results today are a US hardiness map that does not describe a Baltic May at all. A focused example is "last frost in Viljandi county".
What evidence does it use?
computed from the open station series of Riigi Ilmateenistus, FMI (CC BY 4.0) and LVGMC; the station-to-municipality mapping is published with the page.
Where does this guide stop?
the sowing calendar says when to sow; this supplies the local frost dates that decision depends on, with their uncertainty.
Turn the reference into a routine
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