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Heating days, growing days and when the season turns
Heating days, growing days and when the season turns: this guide has a section for each city per year: heating degree days by month against the normal, so a…
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 city per year: heating degree days by month against the normal, so a household can tell a cold winter from a badly insulated house; the date the heating season conventionally begins and ends (the three-day +8 C rule used in Estonia and Finland); cooling degree days for the new hot fortnights; and growing degree days on base 5 and base 10 by week for gardeners and growers. A focused example is "heating season 2027 in Tartu: when it started and how cold it was".
How to use it
Use Heating days, growing days and when the season turns 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 algab kütteperiood |
| Finnish | lämmitystarveluku 2027 |
| Russian | когда начинается отопительный сезон в Эстонии |
| English | heating degree days by month |
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 open daily temperature series; method and reference figures from Eurostat's HDD/CDD dataset (open) and FMI's published lämmitystarveluku (CC BY 4.0). · 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
This guide owns the explanatory layer for the topic. Personal decisions, diagnoses, legal determinations and live availability remain with the relevant professional or official service.
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 city per year: heating degree days by month against the normal, so a household can tell a cold winter from a badly insulated house; the date the heating season conventionally begins and ends (the three-day +8 C rule used in Estonia and Finland); cooling degree days for the new hot fortnights; and growing degree days on base 5 and base 10 by week for gardeners and growers. A focused example is "heating season 2027 in Tartu: when it started and how cold it was".
What evidence does it use?
computed from open daily temperature series; method and reference figures from Eurostat's HDD/CDD dataset (open) and FMI's published lämmitystarveluku (CC BY 4.0).
Where does this guide stop?
It explains the topic and points to primary or official sources. It does not replace a qualified professional, an official decision, or advice based on your own circumstances.
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