Last frost date in Ottawa, Kansas
April 18
Average last frost in spring. In an early year (1 in 10) it's over by April 5; in a late year (1 in 10) it comes after May 1.
October 20
Average first frost in fall. 1 year in 10 it comes by October 3.
Source: NOAA U.S. Climate Normals 1991–2020, station Ottawa (USC00146128), 1.3 miles from Ottawa, elevation 905 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 5 | Apr 18 | May 1 |
| First frost in fall | Oct 3 | Oct 20 | Nov 1 |
Frost-free days in an average year: 183
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 29 | Oct 9 |
| Frost (32°F) | Every year | Apr 18 | Oct 20 |
| Hard freeze (28°F) | Every year | Apr 8 | Oct 30 |
Nights at 32°F or colder in an average year: 111
What to plant now in Ottawa
- Spring planting calendar for an average last frost around April 20 Ottawa: April 18
- Fall planting calendar for an average first frost around October 20 Ottawa: October 20
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Kansas
- Gardner 23 mi · last frost Apr 13
- Lawrence 25 mi · last frost Apr 12
- Overland Park 37 mi · last frost Apr 10
- Shawnee 38 mi · last frost Apr 16
- Topeka 38 mi · last frost Apr 16
Updated