AI-generatedOshawa at a glance
- Best time
- May – Sep
- Warmest month
- Jul · 27°
- Sunshine a year
- 2,120 h
- Rain a year
- 889 mm
- Climate
- Continental
- Time zone
- UTC−5 / UTC−4
- Elevation
- 105 m
Climate in Oshawa
Oshawa has mild to warm summers and cold winters with occasional snow. July is the warmest month with average highs of 27 °C, while January is the coolest at −1 °C. With around 2,120 hours of sunshine a year, Oshawa is moderately sunny; July is the sunniest month with 8.9 hours a day.
Holiday weather through the year
Best time to visit Oshawa
The best time to visit Oshawa is from May to September. For sightseeing, day trips and hiking, conditions are most comfortable from May to September. The wettest month is June with 93 mm of precipitation.
Oshawa through the seasons
How the weather changes over the seasons, with averages for each.
Oshawa in spring
Mar – May
Fair
- 5–18 °C by day
- 6.6 h of sun a day
- 33 rainy days in all
Oshawa in summer
Jun – Aug
Excellent
- 23–27 °C by day
- 8.3 h of sun a day
- 32 rainy days in all
Oshawa in autumn
Sep – Nov
Fair
- 8–22 °C by day
- 4.8 h of sun a day
- 30 rainy days in all
Oshawa in winter
Dec – Feb
Poor
- 0–3 °C by day
- 3.5 h of sun a day
- 31 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Sep
15–28 °C and not too much rain
Snow
Nov – Mar
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Oshawa for you.
Your best months: June, August – September
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Fair
Best time to visit: May – September
A typical day in October
- Morning, 08:00: about 8°
- Midday, 13:00: about 14°
- Afternoon, 16:00: about 15°
- Evening, 20:00: about 12°
- Night, 23:00: about 10°
07:2818:34
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:10–08:07 · evening 17:55–18:52
- Blue hour
- Morning 06:59–07:10 · evening 18:52–19:03
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Oshawa compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 18° at the start of the month to 11° at the end. The days get 1.4 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 18° | 11° |
| Night-time low | 11° | 5° |
| Daylight | 11.8 h | 10.4 h |
What is the weather like in Oshawa in October?
In October, Oshawa is cool: daytime highs average 15 °C, and nights cool down to about 8 °C. Expect around 4.4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 77 mm in total. All in all, October is a so-so month for a holiday in Oshawa.
More details for October
- Daylight
- 11 h 6 min07:28 – 18:34
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 62 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4offset from UTC
How the score comes together
- Temperatureweight 50 %67 %
- Sunshineweight 20 %23 %
- Few rainy daysweight 30 %49 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Oshawa
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
July has the better holiday weather in Oshawa: score 85 against 53. In July, days are 12 °C warmer than in October. The sun shines 5 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Holiday weather score | 53 | 85better |
| Daytime high | 15° | 27° |
| Night-time low | 8° | 18° |
| Sunshine | 4.4 h | 8.9 hbetter |
| Rainy days | 11 | 11 |
| Rainfall | 77 mm | 86 mm |
| Muggy days | 0better | 9 |
Based on the climate averages 1996–2025.
Oshawa month by month
The typical weather for every month at a glance.
16January0° · 3.2 h
In January, Oshawa is bitterly cold: daytime highs average −1 °C, and nights often drop below freezing (−7 °C). The sun is scarce, with only about 3.2 hours a day. Precipitation falls on about 11 days, totalling 64 mm; on about 7 of them it snows. All in all, January is not an ideal month for a holiday in Oshawa.
Oshawa in January24February0° · 4.5 h
In February, Oshawa is bitterly cold: daytime highs average 0 °C, and nights often drop below freezing (−7 °C). Expect around 4.5 hours of sunshine a day. Precipitation falls on about 9 days, totalling 57 mm; on about 6 of them it snows. All in all, February is not an ideal month for a holiday in Oshawa.
Oshawa in February25March5° · 5.6 h
In March, Oshawa is cold: daytime highs average 5 °C, and nights often drop below freezing (−2 °C). Expect around 5.6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 62 mm in total. Snow falls on about 4 days. All in all, March is not an ideal month for a holiday in Oshawa.
Oshawa in March41April11° · 6.5 h
In April, Oshawa is cool: daytime highs average 11 °C, and nights cool down to about 3 °C. The sun shines for around 6.5 hours a day. Rain is frequent, with about 12 rainy days and 84 mm in total. Snow falls on about 2 days. All in all, April is a so-so month for a holiday in Oshawa.
Oshawa in April81May18° · 7.7 h
In May, Oshawa is mild: daytime highs average 18 °C, and nights cool down to about 9 °C. The sun shines for around 7.7 hours a day. Rain is frequent, with about 11 rainy days and 75 mm in total. All in all, May is an excellent month for a holiday in Oshawa.
Oshawa in May82June23° · 8.2 h
In June, Oshawa is warm: daytime highs average 23 °C, and nights cool down to about 15 °C. The sun shines for around 8.2 hours a day. Rain is frequent, with about 11 rainy days and 93 mm in total. All in all, June is an excellent month for a holiday in Oshawa.
Oshawa in June85July27° · 8.9 h
In July, Oshawa is warm: daytime highs average 27 °C, and nights cool down to about 18 °C. The sun shines for around 8.9 hours a day. Rain is frequent, with about 11 rainy days and 86 mm in total. All in all, July is an excellent month for a holiday in Oshawa.
Oshawa in July83August26° · 7.8 h
In August, Oshawa is warm: daytime highs average 26 °C, and nights cool down to about 18 °C. The sun shines for around 7.8 hours a day. Rain is frequent, with about 10 rainy days and 76 mm in total. All in all, August is an excellent month for a holiday in Oshawa.
Oshawa in August81September22° · 6.5 h
In September, Oshawa is warm: daytime highs average 22 °C, and nights cool down to about 14 °C. The sun shines for around 6.5 hours a day. Rain falls on about 9 days, adding up to 77 mm. All in all, September is an excellent month for a holiday in Oshawa.
Oshawa in September53October15° · 4.4 h
In October, Oshawa is cool: daytime highs average 15 °C, and nights cool down to about 8 °C. Expect around 4.4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 77 mm in total. All in all, October is a so-so month for a holiday in Oshawa.
Oshawa in October20November8° · 3.6 h
In November, Oshawa is cold: daytime highs average 8 °C, and nights cool down to about 2 °C. The sun is scarce, with only about 3.6 hours a day. Rain is frequent, with about 10 rainy days and 66 mm in total. Snow falls on about 2 days. All in all, November is not an ideal month for a holiday in Oshawa.
Oshawa in November14December3° · 2.7 h
In December, Oshawa is bitterly cold: daytime highs average 3 °C, and nights often drop below freezing (−3 °C). The sun is scarce, with only about 2.7 hours a day. Precipitation falls on about 11 days, totalling 72 mm; on about 6 of them it snows. All in all, December is not an ideal month for a holiday in Oshawa.
Oshawa in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Oshawa
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
CoolOctober: nights around 8°. A duvet at night and a jumper for the evening.
The coolest nights are in January (−7°), the warmest in July (18°). Nights are pleasant for sleeping (15 to 20 °C) from June to August. Nights fall below 8 °C on average from November to April, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 16 | −1° | −7° | 3.2 h | 11 | 64 |
| FebruaryFeb | 24 | 0° | −7° | 4.5 h | 9 | 57 |
| MarchMar | 25 | 5° | −2° | 5.6 h | 10 | 62 |
| AprilApr | 41 | 11° | 3° | 6.5 h | 12 | 84 |
| MayMay | 81 | 18° | 9° | 7.7 h | 11 | 75 |
| JuneJun | 82 | 23° | 15° | 8.2 h | 11 | 93 |
| JulyJul | 85 | 27° | 18° | 8.9 h | 11 | 86 |
| AugustAug | 83 | 26° | 18° | 7.8 h | 10 | 76 |
| SeptemberSep | 81 | 22° | 14° | 6.5 h | 9 | 77 |
| OctoberOct | 53 | 15° | 8° | 4.4 h | 11 | 77 |
| NovemberNov | 20 | 8° | 2° | 3.6 h | 10 | 66 |
| DecemberDec | 14 | 3° | −3° | 2.7 h | 11 | 72 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
43.90° N, 78.85° W · 105 m · America/Toronto
Sunshine hours in Oshawa
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 4.4 of 11.1 hours of daylight in Oshawa, 40 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain in Oshawa: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Oshawa has about 11 rainy days with 77 mm of rain in total.
UV index in Oshawa
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 3 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 9).
Minutes until sunburn in October
- Very fair skin
- about 40 min
- Fair skin
- about 50 min
- Light brown skin
- about 70 min
- Olive skin
- about 90 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind and clouds in Oshawa
How breezy and how cloudy Oshawa is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Oshawa typically peaks at 20 km/h during the day: Beaufort 4, moderate breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 62 % of the sky over Oshawa: variable cloud, with about 4.4 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Oshawa
How often the day gets hot in Oshawa (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Oshawa has about 0 hot days, with an average daytime high of 15 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow in Oshawa
When Oshawa is likely to be white: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in Oshawa.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Planning a trip to Oshawa
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Oshawa in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Oshawa has its best school-holiday weather during the summer holidays (score 84) and its weakest during the Christmas holidays (score 15).
- 36
Easter holidays
Mar – Apr
Poor
- 9 °C by day
- 6.2 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
- 81
May half-term
May – Jun
Excellent
- 19 °C by day
- 7.8 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 84
Summer holidays
Jul – Aug
ExcellentBest holidays
- 26 °C by day
- 8.2 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 53
October half-term
Oct
Fair
- 15 °C by day
- 4.4 h of sun a day
- 11 rainy days a month
- 15
Christmas holidays
Dec – Jan
Poor
- 1 °C by day
- 3.0 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 7 h 20 min
- Distance
- 5,640 km
- Time zone
- UTC−4
- Jet lag
- About 3 days (5 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Compare & alternatives
Oshawa compared
Put Oshawa side by side with another destination.
Oshawa vs Whitby
In October the holiday weather in Oshawa and Whitby is about equally good (score 53 vs 53). During the day it is about as warm in Whitby as in Oshawa.
| in October | Oshawa | Whitby |
|---|---|---|
| Holiday weather score | 53 | 53 |
| Daytime high | 15° | 15° |
| Sunshine | 4 h | 4 h |
| Rainy days | 11 | 11 |
| Best time | May – Sep | May – Sep |
Through the year
Canada in October: the best places
In October, Oshawa ranks 11 among the 31 nearest destinations in this country.
- Brantford16°58
- 2Cobourg15°57
- 3St. Catharines16°57
- 4Hamilton15°57
- 5Port Hope15°55
- 6Oakville15°55
- 7Niagara Falls16°55
- 8Burlington15°55
- 11OshawaThis page15°53
Near Oshawa
Other destinations close by.
Places with a climate like Oshawa
Destinations whose weather through the year is closest to Oshawa's – good alternatives.
Frequently asked questions about Oshawa
When is the best time to visit Oshawa?
The best time to visit Oshawa is from May to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Oshawa?
July is the warmest month, with average highs of 27 °C and nights around 18 °C. January is the coolest month at −1 °C.
When does it rain most in Oshawa?
The wettest month is June with 93 mm of precipitation. The driest month is February with 57 mm.
How many hours of sunshine does Oshawa get?
Oshawa gets around 2,120 hours of sunshine a year. The sunniest month is July with 8.9 hours a day; in December there are 2.7 hours a day.
What time zone is Oshawa in?
Oshawa is on UTC−5 in January and UTC−4 in July.
How long is the flight from London to Oshawa?
A nonstop flight from London to Oshawa takes about 7 h 20 min, for a straight-line distance of about 5,640 km.
Which school holidays are best for Oshawa?
Oshawa has its best school-holiday weather during the summer holidays (score 84) and its weakest during the Christmas holidays (score 15). Holiday ratings (0–100): Easter holidays 36, May half-term 81, summer holidays 84, October half-term 53, Christmas holidays 15.