Climate and monthly weather forecastOshawa, Canada
Climate and monthly weather forecast
The climate of Oshawa
Oshawa, Canada, operates within a Humid continental domain, characterized by the Dfb Köppen climate classification. The geographical positioning lends itself to a no dry season and warm summer weather. Analyzing the climatic data, a thread of humidity can be seen throughout the year, which fluctuates marginally between 76% and 86%.Temperature variations are significant, with highs ranging from -2.9°C (26.8°F) in January to peaks of 24.4°C (75.9°F) in July. On the other end of the temperature scale, the lowest observed temperature is -8.3°C (17.1°F) in January, with fluctuations leading up to the warmest low of 16.7°C (62.1°F) in July.
Rainfall exhibits less variation across the year, ranging from 43mm (1.69") in February and November to 73mm (2.87") in August. The frequency of rainfall days follows a similar pattern, peaking at 17.8 days in July and hitting a low of 7.3 days in February. Snowfall is predominantly a winter phenomenon, occurring from November to March, providing a unique weather pattern characteristic of the region.
The best time to visit Oshawa
The best time to visit Oshawa depends largely on the activities planned by visitors. For those seeking warmer weather, the period from June to September presents the highest average temperatures, reaching up to 24.4°C (75.9°F) during July. In addition to balmy days, these summer months also offer an average of 9 to 10.6 hours of sunshine per day.For visitors interested in nature and outdoor activities, this period also brings lower wind speeds and a reduced chance of rainfall, thereby ensuring a more enjoyable experience. Thus, the summer months strongly emerge as the best time to visit Oshawa.
The worst time to visit Oshawa
The period from December to February represents the harshest climatic conditions in Oshawa. Average high temperatures throughout these months fall below freezing, reaching a low of -2.9°C (26.8°F) in January. Furthermore, these cold months also bring regular snowfall, with January and February witnessing accumulations of 90mm (3.54") to 110mm (4.33") respectively.Visibility is also slightly compromised during these colder months, recording an average visibility of 8km (5mi) to 9km (5.6mi), as opposed to 10km (6.2mi) during the rest of the year. As such, unless winter sports are on the agenda, these months may not be the most comfortable or accessible for typical tourist activities.
Spring weather in Oshawa
Spring in Oshawa begins in March and lasts until May. Average high temperatures during this period rise from a cool 2.6°C (36.7°F) in March to a more comfortable 15.7°C (60.3°F) by May. Average low temperatures also increase during this period, moving from -3.3°C (26.1°F) in March to a mild 8°C (46.4°F) in May.Humidity tends to decrease in Spring, gradually falling from 80% in March to 77% in May. Rainfall levels rise from 45mm (1.77") in March to a peak of 70mm (2.76") in May, with corresponding rainfall days also increasing progressively from 11 to 16 respectively.
Summer weather in Oshawa
Summer in Oshawa spans from June to August, known for its warm weather, with average high temperatures curving between 20.2°C (68.4°F) and 24.4°C (75.9°F). Likewise, average lows also remain relatively warm, ranging from 12.7°C (54.9°F) to 16.7°C (62.1°F).Humidity levels show a slight shift during the summer months, resting at 78-79%. Rainfall is consistent, reaching its peak at 73mm (2.87") in August, with an average equivalent of 17 days of rainfall. Sunshine levels reach an average of 9 to 10.6 hours daily, allowing for optimal outdoor activity conditions.
Autumn weather in Oshawa
Autumn descends on Oshawa from September to November. Temperatures start to drop, with high averages reducing from 20.3°C (68.5°F) in September to 6.1°C (43°F) in November. Low averages follow suit, falling from 13.4°C (56.1°F) to 1.5°C (34.7°F) in the same period.Rainfall in Autumn fluctuates between 52mm (2.05") and 67mm (2.64"), while the associated rainfall days range between 14 and 15.5 days.
Winter weather in Oshawa
Winter in Oshawa extends from December to February. High average temperatures during this time plunge to near and below freezing. December marks the start of winter with a high average temperature of 0.5°C (32.9°F), which further falls to -2.9°C (26.8°F) in January, and slight upward adjustment in February to -2.2°C (28°F). Low averages across winter range from -3.6°C (25.5°F) to -8.3°C (17.1°F).Snowfall exhibits significant presence in winter, measuring from 45mm (1.77") in November to a substantial 110mm (4.33") in February. Consequently, this period can be ideal for tourists interested in winter sports. Despite low temperatures, winter in Oshawa does shine a unique charm with its snow-covered landscapes.
Weather in January
Bracing, cold conditions typically mark the onset of the New Year in Oshawa. January weather features low temperatures, typically falling to a chilly -8.3°C (17.1°F), coupled with a relative humidity of 86%. Snowfall is common, with a majestic white blanket often covering the city. Weather in January »Weather in February
Moving into February, there's a moderate increase in average high temperatures, offering slight relief from January's bone-chilling cold. However, the increased snowfall, reaching up to 110mm (4.33") in February, makes this month the snowiest. Weather in February »Weather in March
March sees the slow, yet steady advent of spring in Oshawa. The month witnesses a significant leap in temperature, rising to a maximum of 2.6°C (36.7°F), offering a refreshing break from the frosty winter. Snowfall reduces drastically, and the number of rainfall days increases, signifying the transition to spring. Weather in March »Weather in April
April characterizes the heart of spring, with typically mild and wet conditions dominating Oshawa. There's a noticeable increase in temperature, peaking at around 8.8°C (47.8°F). However, the city experiences extensive precipitation, and rainfall days are at their highest this month. Weather in April »Weather in May
May brings about a significant transformation in weather patterns, introducing warm and sunny conditions to Oshawa. The city basks in moderate warmth with high temperatures averaging 15.7°C (60.3°F). Abundant sunshine coupled with decent visibility enhances the appeal of the outdoors, inviting citizens to enjoy picnics and leisure strolls. Weather in May »Weather in June
June is the true start of the warm, summer period in Oshawa. The city enjoys sunny weather, with temperatures rising appreciably, occasionally touching 20.2°C (68.4°F). Bright, sunny days become more frequent, and the sea temperature sees a sharp increase. Weather in June »Weather in July
July is the hottest month of the year in Oshawa, with high temperatures hovering around 24.4°C (75.9°F). Long sunlight hours, mild humidity, and comfortable sea temperatures make for delightful beach outings. However, July witnesses a moderate number of rainfall days, offering periods of cooling respite from the incessant summer heat. Weather in July »Weather in August
August continues the summer trend set by July, but with a marginal decrease in temperature. The climate remains largely warm and inviting, and sea temperatures peak, making it ideal for swimming and watersports. Despite being in the latter half of summer, rainfall remains a common feature throughout the month. Weather in August »Weather in September
In September, Oshawa sees the advent of fall, as temperatures begin to drop and days become shorter. However, the high temperature averaging 20.3°C (68.5°F), maintains the warm trend from summer. The pleasant sea temperature persists, allowing beach visits to continue. Weather in September »Weather in October
October heralds a distinct shift towards cooler autumnal weather, with increasingly crisp and shorter days. Yet, the city witnesses a significant amount of rainfall, with total precipitation reaching 67mm (2.64"). A drastic reduction in sea temperature marks the end of beach activities. Weather in October »Weather in November
November transitions Oshawa from autumn to the onset of winter. With a sharp decrease in temperature, often averaging just 6.1°C (43°F), warming layers become a necessity. The first hints of snowfall appear, setting the stage for the imminent winter. Weather in November »Weather in December
December holds the reins of winter firmly, with biting cold temperatures, often falling to -3.6°C (25.5°F). A beautiful layer of snow covering the city makes the perfect setting for Christmas celebrations. Despite the chilly weather, Oshawa remains lively, filled with holiday spirit. Weather in December »Updated: Feb 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Oshawa, January registers the lowest temperatures, averaging -2.9°C (26.8°F) at the peak and -8.3°C (17.1°F) at the lowest.
The months with the highest humidity in Oshawa are January and February, with an average relative humidity of 86%.
Throughout the year, in Oshawa, there are 158.8 rainfall days, and 693mm (27.28") of precipitation is accumulated.
January through April, November and December are months with snowfall in Oshawa.
In Oshawa, Canada, during the entire year, snow falls for 51.4 days and aggregates up to 383mm (15.08") of snow.
January has the least sunshine of the year, with an average of 3h of sunshine.
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
The months with the least rainfall are February and November Rain falls for 7.3 days and accumulates 43mm (1.69") of rain.
February is the month with the most snowfall in Oshawa. Snow falls for 13 days and accumulates 110mm (4.33") of snow.
With an average sea temperature of 2.3°C (36.1°F), March is the month with the coldest seawater in Oshawa.
On Sunday, 10. March 2024, at 2:00 am, Daylight Saving Time starts in Oshawa, Canada, and the time zone changes from EST to EDT. Daylight Saving Time ends on Sunday, 03. November 2024, at 2:00 am, and the time zone reverts from EDT to EST.
The least humid month is April, with an average relative humidity of 76%.
May through October are months without snowfall.
With an average of 15h and 24min of daylight, June has the longest days of the year.
In Oshawa, July is identified by the average highest temperatures, reaching a peak of 24.4°C (75.9°F) and a low of 16.7°C (62.1°F).
With an average of 10.6h of sunshine, July has the most sunshine of the year.
July is the month with the highest UV index in Oshawa, with an average maximum UV index of 6.
August is the month with the most rainfall in Oshawa, Canada. Rain falls for 17.1 days and accumulates 73mm (2.87") of precipitation.
August is the month with the warmest seawater in Oshawa, Canada, with an average sea temperature of 22.4°C (72.3°F).
The month with the shortest days in Oshawa is December, with an average of 9h and 0min of daylight.
Average temperature
Oshawa, Canada
The warmest month (with the highest average high temperature) is July (24.4°C).
The month with the lowest average high temperature is January (-2.9°C).
The month with the highest average low temperature is August (16.8°C).
The coldest month (with the lowest average low temperature) is January (-8.3°C).
Average pressure
Oshawa, Canada
- Average pressure in January:
1016.9mbar - Average pressure in February:
1016.8mbar - Average pressure in March:
1018.3mbar - Average pressure in April:
1014.6mbar - Average pressure in May:
1015.2mbar - Average pressure in June:
1013mbar
- Average pressure in July:
1013.7mbar - Average pressure in August:
1014.4mbar - Average pressure in September:
1017mbar - Average pressure in October:
1015.4mbar - Average pressure in November:
1018.1mbar - Average pressure in December:
1017.3mbar
The month with the highest atmospheric pressure is March (1018.3mbar).
The month with the lowest atmospheric pressure is June (1013mbar).
Average wind speed
Oshawa, Canada
- Average wind speed in January:
18.7km/h - Average wind speed in February:
18.2km/h - Average wind speed in March:
17.2km/h - Average wind speed in April:
17.1km/h - Average wind speed in May:
13.2km/h - Average wind speed in June:
11.9km/h
- Average wind speed in July:
11.4km/h - Average wind speed in August:
11.9km/h - Average wind speed in September:
13km/h - Average wind speed in October:
16.2km/h - Average wind speed in November:
17.1km/h - Average wind speed in December:
17.9km/h
The windiest month (with the highest average wind speed) is January (18.7km/h).
The calmest month (with the lowest average wind speed) is July (11.4km/h).
Average humidity
Oshawa, Canada
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).
Average rainfall
Oshawa, Canada
The wettest month (with the highest rainfall) is August (73mm).
The driest months (with the least rainfall) are February and November (43mm).
Average rainfall days
Oshawa, Canada
- Average rainfall days in January:
8.2 days - Average rainfall days in February:
7.3 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
14 days - Average rainfall days in May:
16.4 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
17.1 days - Average rainfall days in September:
14.1 days - Average rainfall days in October:
15.5 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
9.8 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (7.3 days).
Average snowfall
Oshawa, Canada
The month with the highest snowfall is February (110mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days
Oshawa, Canada
- Average snowfall days in January:
13.8 days - Average snowfall days in February:
13 days - Average snowfall days in March:
7.3 days - Average snowfall days in April:
3.3 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
4.4 days - Average snowfall days in December:
9.1 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature
Oshawa, Canada
The best month for swimming (with the highest average sea temperature) is August (22.4°C).
The coldest month (with the lowest average sea temperature) is March (2.3°C).
Average daylight / Average sunshine
Oshawa, Canada
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 48min - Average daylight in June:
15h and 24min
- Average daylight in July:
15h and 6min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
3h and 0min - Average sunshine in February:
3h and 12min - Average sunshine in March:
5h and 24min - Average sunshine in April:
7h and 24min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 24min - Average sunshine in September:
9h and 18min - Average sunshine in October:
4h and 42min - Average sunshine in November:
4h and 24min - Average sunshine in December:
3h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days
Oshawa, Canada
- Average sunshine days in January:
12.2 days - Average sunshine days in February:
11.5 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
12.4 days - Average sunshine days in May:
12.6 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
10.4 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
13.6 days - Average sunshine days in October:
13.3 days - Average sunshine days in November:
14.9 days - Average sunshine days in December:
13.3 days
The month with the most sunshine days is November (14.9 days).
The month with the least sunshine days is July (10.4 days).
Average UV index
Oshawa, Canada
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Oshawa, Canada
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Oshawa, Canada
The months with the highest visibility are August and September (10km).
The month with the lowest visibility is January (8km).
