Last Frost Date Billings: Frost Dates, Late Frost Risk & Growing Season
When is the last spring frost and the first autumn frost in Billings? Frost dates from 30 years of data, the risk of late frost, frost-free days and planting dates.
The frost season in Billings
- Last frost (average): May 2
- In 1 year out of 10 it still freezes on May 13.
- First frost: October 5
- Frost-free season: 158 days
- Frost after 15 May: in 3 % of years
Frost days per month in Billings
- January: 29.8 · -8 °C
- February: 26.7 · -7 °C
- March: 22.6 · -3 °C
- April: 11.1 · 1 °C
- May: 1.5 · 7 °C
- June: 0 · 11 °C
- July: 0 · 15 °C
- August: 0 · 14 °C
- September: 0.5 · 9 °C
- October: 7.9 · 3 °C
- November: 22.4 · -3 °C
- December: 29.3 · -7 °C
- Matched to the average lows of a weather station 2 km away – accurate to about ±1–2 weeks.
- Daily minimum temperatures 2 m above ground over 30 years (1991–2020), NASA POWER; station data: Deutscher Wetterdienst (CC BY 4.0). Ground frost can form while the air at 2 m is still +2 to +3 °C.