Best time to visit Sudbury
The best time to visit Sudbury is May–July, judged on twenty years of weather records and the events worth going for.
Sudbury, Ontario, Canada
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | -6.2 °C / 21 °F | -16 °C / 3 °F | 51 mm / 2 in | neither best nor good |
| February | -5 °C / 23 °F | -15.8 °C / 4 °F | 47 mm / 1.8 in | neither best nor good |
| March | 2 °C / 36 °F | -9.2 °C / 15 °F | 55 mm / 2.2 in | neither best nor good |
| April | 9.6 °C / 49 °F | -1.4 °C / 29 °F | 86 mm / 3.4 in | neither best nor good |
| May | 18.3 °C / 65 °F | 5.9 °C / 43 °F | 69 mm / 2.7 in | best month |
| June | 22.8 °C / 73 °F | 11.2 °C / 52 °F | 86 mm / 3.4 in | best month |
| July | 25.2 °C / 77 °F | 13.8 °C / 57 °F | 85 mm / 3.3 in | best month |
| August | 23.8 °C / 75 °F | 12.9 °C / 55 °F | 90 mm / 3.5 in | good month |
| September | 19.3 °C / 67 °F | 8.6 °C / 47 °F | 80 mm / 3.1 in | good month |
| October | 11.6 °C / 53 °F | 2.9 °C / 37 °F | 104 mm / 4.1 in | neither best nor good |
| November | 3.4 °C / 38 °F | -4.1 °C / 25 °F | 67 mm / 2.6 in | neither best nor good |
| December | -3.4 °C / 26 °F | -11.5 °C / 11 °F | 66 mm / 2.6 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: best
- JJune: best
- JJuly: best
- AAugust: good
- SSeptember: good
- OOctober: neither
- NNovember: neither
- DDecember: neither
- Best
- May–July
- Good
- August–September
Why these months
May · best
In its favour: feels like (high) 16.3 °C / 61 °F, average daily high 18.3 °C / 65 °F, share of daylight that is sunny 72%, precipitation 69 mm / 2.7 in, days with heavy rain 2.1 days, wet days 9.9 days, relative humidity 64%, average daily low 5.9 °C / 43 °F.
June · best
In its favour: feels like (high) 22.4 °C / 72 °F, average daily high 22.8 °C / 73 °F, share of daylight that is sunny 74%, precipitation 86 mm / 3.4 in, days with heavy rain 2.9 days, average daily low 11.2 °C / 52 °F, wet days 11.2 days, relative humidity 70%.
July · best
In its favour: feels like (high) 25.6 °C / 78 °F, average daily high 25.2 °C / 77 °F, share of daylight that is sunny 81%, precipitation 85 mm / 3.3 in, days with heavy rain 2.9 days, average daily low 13.8 °C / 57 °F, wet days 10.3 days, relative humidity 73%.
August · good
In its favour: feels like (high) 23.9 °C / 75 °F, average daily high 23.8 °C / 75 °F, share of daylight that is sunny 78%, precipitation 90 mm / 3.5 in, days with heavy rain 3 days, average daily low 12.9 °C / 55 °F, wet days 11.2 days, relative humidity 76%.
September · good
In its favour: feels like (high) 18.3 °C / 65 °F, average daily high 19.3 °C / 67 °F, share of daylight that is sunny 71%, precipitation 80 mm / 3.1 in, days with heavy rain 2.5 days, wet days 10.5 days, average daily low 8.6 °C / 47 °F.
Against: relative humidity 81%.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: good
- MMay: best
- JJune: best
- JJuly: good
- AAugust: good
- SSeptember: best
- OOctober: good
- NNovember: neither
- DDecember: neither
- Best
- May–June, September
- Good
- April, July–August, October
Why these months
April · good
In its favour: average daily high 9.6 °C / 49 °F, precipitation 86 mm / 3.4 in, share of daylight that is sunny 67%, daylight per day 13.6 h, days with heavy rain 3.1 days, wet days 11.2 days, wind (daily max) 18 km/h / 11 mph, feels like (high) 6 °C / 43 °F.
Against: average daily low -1.4 °C / 29 °F.
May · best
In its favour: average daily high 18.3 °C / 65 °F, precipitation 69 mm / 2.7 in, days with heavy rain 2.1 days, feels like (high) 16.3 °C / 61 °F, average daily low 5.9 °C / 43 °F, share of daylight that is sunny 72%, daylight per day 15 h, wet days 9.9 days, wind (daily max) 17 km/h / 10 mph.
June · best
In its favour: average daily high 22.8 °C / 73 °F, precipitation 86 mm / 3.4 in, average daily low 11.2 °C / 52 °F, share of daylight that is sunny 74%, daylight per day 15.8 h, feels like (high) 22.4 °C / 72 °F, days with heavy rain 2.9 days, wet days 11.2 days, wind (daily max) 16 km/h / 10 mph.
July · good
In its favour: precipitation 85 mm / 3.3 in, average daily high 25.2 °C / 77 °F, average daily low 13.8 °C / 57 °F, share of daylight that is sunny 81%, daylight per day 15.4 h, wet days 10.3 days, days with heavy rain 2.9 days, wind (daily max) 16 km/h / 10 mph, feels like (high) 25.6 °C / 78 °F.
August · good
In its favour: average daily high 23.8 °C / 75 °F, precipitation 90 mm / 3.5 in, average daily low 12.9 °C / 55 °F, share of daylight that is sunny 78%, daylight per day 14.1 h, days with heavy rain 3 days, wet days 11.2 days, feels like (high) 23.9 °C / 75 °F, wind (daily max) 16 km/h / 10 mph.
September · best
In its favour: average daily high 19.3 °C / 67 °F, precipitation 80 mm / 3.1 in, days with heavy rain 2.5 days, feels like (high) 18.3 °C / 65 °F, average daily low 8.6 °C / 47 °F, share of daylight that is sunny 71%, daylight per day 12.5 h, wet days 10.5 days, wind (daily max) 16 km/h / 10 mph.
October · good
In its favour: average daily high 11.6 °C / 53 °F, precipitation 104 mm / 4.1 in, share of daylight that is sunny 60%, average daily low 2.9 °C / 37 °F, feels like (high) 8.6 °C / 47 °F, days with heavy rain 3.5 days, daylight per day 10.9 h, wind (daily max) 18 km/h / 11 mph.
Against: wet days 12.8 days.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Mont Ste. Marie, 398 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | -11 °C | -9.9 °C | -2.5 °C | 6 °C | 16.3 °C | 22.4 °C | 25.6 °C | 23.9 °C | 18.3 °C | 8.6 °C | -0.5 °C | -7.9 °C |
| Days with heavy rain | 1.1 days | 1.1 days | 1.6 days | 3.1 days | 2.1 days | 2.9 days | 2.9 days | 3 days | 2.5 days | 3.5 days | 1.8 days | 1.8 days |
| Time rain usually falls | 9 pm | 7 am | 11 am | 12 pm | 4 pm | 4 pm | 6 pm | 4 pm | 2 pm | 3 am | 1 am | 3 am |
| Sunshine per day | 5.1 h | 6.8 h | 8.3 h | 9.1 h | 10.9 h | 11.7 h | 12.5 h | 10.9 h | 8.9 h | 6.6 h | 5.1 h | 4.3 h |
| Relative humidity | 81% | 76% | 68% | 65% | 64% | 70% | 73% | 76% | 81% | 81% | 83% | 83% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 2.4 µg/m³ | 4.2 µg/m³ | 5.6 µg/m³ | 6.4 µg/m³ | 7.5 µg/m³ | 13.5 µg/m³ | 10.1 µg/m³ | 7.4 µg/m³ | 5.3 µg/m³ | 4.1 µg/m³ | 2.9 µg/m³ | 2.6 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 5 µg/m³ | 8.1 µg/m³ | 9.7 µg/m³ | 11.3 µg/m³ | 13.7 µg/m³ | 23.6 µg/m³ | 17.3 µg/m³ | 12.7 µg/m³ | 9.1 µg/m³ | 7.7 µg/m³ | 6 µg/m³ | 5.2 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.