Frost risk
Last frost in Viterbo
Median last frost, cautious frost date, and guidance on sowing before or after cold risk in Viterbo.
Median 0 °C
March 18springCautious 2 °C
April 9springAutumn 2 °C
November 6first frostWhat 0 °C and 2 °C mean
Reference dates
When spring frosts usually fall
- March 180C median
- April 10C cautious
- March 282C median
- April 92C cautious
| indicator | date |
|---|---|
| Median last frost 0 °C | March 18 |
| Cautious last frost 0 °C | April 1 |
| Median last frost 2 °C | March 28 |
| Cautious last frost 2 °C | April 9 |
| Cautious first autumn frost 0 °C | November 20 |
| Cautious first autumn frost 2 °C | November 6 |
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 | April 2 | -2.25 °C |
| 2019 | February 25 | -0.14 °C |
| 2018 | March 24 | -1.12 °C |
| 2017 | January 21 | -0.99 °C |
| 2016 | January 24 | -0.67 °C |
| 2015 | April 8 | -0.15 °C |
| 2014 | January 29 | -2.22 °C |
| 2013 | March 16 | -2.4 °C |
| 2012 | March 8 | -0.38 °C |
| 2011 | March 10 | -0.89 °C |
Frequently asked questions
What is the cautious garden date for Viterbo?
The most cautious date on this page is April 9 on the 2 °C threshold. For sensitive crops, use it as the reference before moving sowing or transplanting earlier.
When should I use the 0 °C date and the 2 °C date?
The median 0 °C date is March 18, while the cautious 2 °C date is April 9. The 2 °C threshold is more cautious for cold nights, inversions, and exposed spots.
Does the frost date apply everywhere in Viterbo?
No. In Viterbo, exposure, elevation, wind, and soil can move real risk earlier or later than the representative municipality point.