Frost risk
Last frost in Aosta
Median last frost, cautious frost date, and guidance on sowing before or after cold risk in Aosta.
Median 0 °C
May 15springCautious 2 °C
June 17springAutumn 2 °C
September 2first frostWhat 0 °C and 2 °C mean
Reference dates
When spring frosts usually fall
- May 150C median
- May 240C cautious
- May 302C median
- June 172C cautious
| indicator | date |
|---|---|
| Median last frost 0 °C | May 15 |
| Cautious last frost 0 °C | May 24 |
| Median last frost 2 °C | May 30 |
| Cautious last frost 2 °C | June 17 |
| Cautious first autumn frost 0 °C | September 14 |
| Cautious first autumn frost 2 °C | September 2 |
Last 10 available years
The table shows, for each available year, the last date between January and June when the daily minimum was at or below 0 °C.
| year | last date <= 0 °C | minimum |
|---|---|---|
| 2020 | May 1 | -0.51 °C |
| 2019 | May 15 | -1.52 °C |
| 2018 | April 13 | -2.63 °C |
| 2017 | May 20 | -0.18 °C |
| 2016 | May 24 | -0.17 °C |
| 2015 | April 29 | -0.62 °C |
| 2014 | May 16 | -0.59 °C |
| 2013 | May 27 | -0.26 °C |
| 2012 | May 17 | -2.36 °C |
| 2011 | May 16 | -0.06 °C |
Frequently asked questions
When does the main frost risk end in Aosta?
The most cautious date on this page is June 17 on the 2 °C threshold. For sensitive crops, use it as the reference before moving sowing or transplanting earlier.
Why also look at the 2 °C threshold?
The median 0 °C date is May 15, while the cautious 2 °C date is June 17. The 2 °C threshold is more cautious for cold nights, inversions, and exposed spots.
Can parts of Aosta differ from this date?
No. In Aosta, exposure, elevation, wind, and soil can move real risk earlier or later than the representative municipality point.