Oshawa Snowfall Totals & Snowstorm Averages
This page pulls together information on when, how much and how often Oshawa, Ontario has snow.
There are data and descriptions here of how many days it snows and the total amount of snowfall that Oshawa usually gets. There are also monthly and yearly counts of the days that Oshawa normally has heavy snowstorms and deep snow accumulated on the ground. Plus there's information on when the city can expect its first and last snowfalls of the season.
All the numbers are long-term historical averages based on weather data gathered from 1981 to 2010 near Oshawa Harbour.
How Often it Snows in Oshawa
This first table lists monthly and yearly totals for amount of snow and how many days it snows at least 0.2 centimetres (0.08 inches).
| Days | Inches | Centimetres | |
|---|---|---|---|
| 8.7 | January | 14.0 | 36 |
| 6.3 | February | 9.8 | 25 |
| 3.8 | March | 5.3 | 13 |
| 0.9 | April | 0.8 | 2 |
| 0.1 | October | 0.0 | 0 |
| 1.8 | November | 1.9 | 5 |
| 5.9 | December | 9.8 | 25 |
| 27.5 | Year | 41.6 | 106 |
When Oshawa Has Its First & Last Snowfalls
The first snowfall of winter for Oshawa usually arrives in November or December, but can show up as early as October.
The season's last snowfall typically happens in March although in some years a late snow lands in April.
Oshawa is normally free of snow every year from May to September.
How Many Snowstorms Oshawa Gets
Most days of snowfall in Oshawa leave less than five centimetres (2 inches) of fresh snow on the ground. For eight days a year on average, the amount of new snow totals at least five cm.
Big snowstorms of over ten cm a day normally occur two or three times a year. But major blizzards that dump 25 cm or more in one day are rare events that don't happen every year. Storms this severe are most likely to appear in January.
| 5 cm 2.0 inches |
10 cm 3.9 inches |
25 cm 9.8 inches | |
|---|---|---|---|
| January | 2.9 | 0.8 | 0.1 |
| February | 1.9 | 0.7 | 0.0 |
| March | 1.2 | 0.2 | 0.0 |
| April | 0.1 | 0.0 | 0.0 |
| November | 0.3 | 0.1 | 0.0 |
| December | 1.7 | 0.8 | 0.0 |
| Year | 8.0 | 2.5 | 0.2 |
How Much Snow Normally Accumulates in Oshawa
For about 63 days a year, Oshawa has at least a centimetre of snow on the ground. In mid-winter the snowpack averages nine cm deep.
| 1 cm 0.4 inches |
5 cm 2.0 inches |
10 cm 3.9 inches |
20 cm 7.9 inches | |
|---|---|---|---|---|
| 23.4 | 16.3 | January | 11.8 | 3.3 |
| 18.7 | 13.7 | February | 8.0 | 2.6 |
| 8.1 | 4.9 | March | 3.0 | 0.5 |
| 0.5 | 0.0 | April | 0.0 | 0.0 |
| 0.1 | 0.0 | October | 0.0 | 0.0 |
| 1.5 | 0.5 | November | 0.3 | 0.0 |
| 10.7 | 6.2 | December | 4.4 | 0.0 |
| 63.0 | 41.5 | Year | 27.5 | 6.4 |
Reference
Environment Canada. Meteorological Service of Canada. Canadian Climate Normals. 1981-2010 Climate Normals & Averages.