It usually starts to “really” warm up between late March and early May in most places in the Northern Hemisphere, but the exact timing depends a lot on where you live and what you personally call “warm.”

Quick Scoop: What “warm up” usually means

For most people, “warming up” is when:

  • Daytime highs stay above winter levels most days.
  • You start seeing more 15–22°C (60–70°F) days, not just a random one-off warm spell.
  • Nights stop dropping below freezing regularly.

A lot of people on weather forums say spring really feels like it’s here once temps are consistently around 18–22°C (mid‑60s to low‑70s °F) and plants start blooming.

By region (Northern Hemisphere)

These are rough patterns; local climate and elevation matter a lot.

  • Southern U.S. & similar latitudes (e.g., parts of Mediterranean):
    • 70°F (21°C) days can show up as early as January or February.
* Many places feel properly mild by March, with last freezes often in early–mid March.
  • Mid-latitude U.S./Europe (Northeast, Midwest, much of central Europe):
    • First 60–70°F (15–21°C) days often appear in March–April.
* Consistent mild weather is more common in April, and many areas are truly “mild” by May.
  • Colder north / interior regions:
    • Often wait until April or even May to get frequent mild days.
* Freezing nights can linger into April or May.
  • Mild coastal West (e.g., coastal California, some subtropical coasts):
    • Have 70s°F (low 20s°C) at various times even in winter, so the warm-up feels more gradual and less dramatic.

Calendar vs. “feels like” spring

  • Astronomical spring in the Northern Hemisphere starts around March 19–21 each year (the spring equinox).
  • But the weather warm-up often lags that date by a few weeks in cooler regions or comes earlier in warmer ones.

So the official start of spring and the time it actually feels warmer are often different things.

Forum-style viewpoints: when people say it’s warm

You’ll see different takes in online discussions:

  • Some say: “Spring starts once highs regularly hit ~18–22°C (65–72°F), usually mid-March where I live.”
  • Others in cooler climates don’t feel like it’s warm until April or even May, once 18°C+ days are common and flowers are in full bloom.

“Right now, we are beginning to see daffodils and snowdrops… Nonetheless, true spring weather doesn't typically settle in until April.”

Quick HTML table for a blog

You mentioned returning tables as HTML, so here’s a snippet you can drop into a post:

html

<table>
  <thead>
    <tr>
      <th>Region (Northern Hemisphere)</th>
      <th>Rough time it starts to feel warm</th>
      <th>Notes</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Southern U.S. / similar latitudes</td>
      <td>Late Feb – March</td>
      <td>First 70°F days often in Jan–Feb; last frosts early–mid March. [web:1]</td>
    </tr>
    <tr>
      <td>Northeast, Midwest, central Europe</td>
      <td>Late March – April</td>
      <td>60–70°F days increase through March–April; many feel true spring in April. [web:1][web:3]</td>
    </tr>
    <tr>
      <td>Colder north / interior</td>
      <td>April – early May</td>
      <td>Freezing nights can persist into April–May; mild days arrive later. [web:1]</td>
    </tr>
    <tr>
      <td>Mild coastal climates</td>
      <td>All winter into spring</td>
      <td>70°F days can appear anytime; warm-up is gradual, less dramatic. [web:1]</td>
    </tr>
  </tbody>
</table>

If you’re writing this as a “Quick Scoop” post

You could frame it like:

  • Hook into the yearly “I’m so done with winter” mood around late January–February.
  • Mention how official spring starts with the March equinox, but the real warm-up depends on region and local culture.
  • Sprinkle in anecdotal vibes from forums: people waiting for the first 18–22°C stretch, watching for daffodils and longer evenings.

If you tell me your city or country, I can narrow down the “warm-up window” much more specifically.