Frost dates for Omsk, Russia
Half of years have their last spring frost by May 10, but 1 year in 10 still frosts after May 19.
A frost date is really a percentile, here from 30 years (1991 to 2020) of a weather model’s daily lows near Omsk: in about half of years a frost still comes after the median date. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
How often a frost still comes on or after each date.
- 1 year in 10
- May 19
- 1 year in 5
- May 17
- 3 years in 10
- May 15
- 2 years in 5
- May 12
- Half of years (the median)
- May 10
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- September 24
- 1 year in 5
- September 26
- 3 years in 10
- September 28
- 2 years in 5
- September 29
- Half of years (the median)
- October 3
- Growing season
- about 148 days
- Hardiness zone nearby
- 3b, estimated from the weather model
Where these numbers come from
Modeled, not measured. No weather station stands behind these dates. They come from ERA5, a reconstruction of the world’s weather from 1991 to 2020 made by ECMWF, Europe’s medium-range weather forecasting agency, for the EU’s Copernicus program, and read here through Open-Meteo. They are the model’s daily lows for the point at 54.75, 73.25, 29 km (18 miles) from the center of Omsk. A frost here means a low at or below 0 °C (32 °F).
A weather model sees the land in squares about 25 km (16 miles) across, so it can miss what sets one garden apart from the next: a frost hollow, a hillside, a lakeshore, a city’s own warmth. The Milpa planner reads these same numbers for a garden here and grades them A good hunch.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a hundred meters away does not. No table can know that about your garden. Your own logged frosts eventually can.
Weather data by Open-Meteo.com, under CC BY 4.0. Contains modified Copernicus Climate Change Service information, 2026.
What can I plant here, and when? ›
Nearby cities
The nearest cities with a frost page here, and how their last-frost dates compare.
- Novosibirsk, Russia, last frost by May 15
- Chelyabinsk, Russia, last frost by May 3
- Yekaterinburg, Russia, last frost by May 18
- Ufa, Russia, last frost by May 2
- Almaty, Kazakhstan, last frost by April 18
- Samara, Russia, last frost by April 27
Other cities in Russia.
- Kazan, Russia, last frost by April 28
- Nizhny Novgorod, Russia, last frost by April 30
- Moscow, Russia, last frost by April 26
- Rostov-on-Don, Russia, last frost by April 2
- Saint Petersburg, Russia, last frost by May 4