When is the best time to go to Sarnia
The chart above shows the best time of year to visit Sarnia, Canada. These are based on an analysis of weather averages such as temperature, rainfall and number of hours of sunshine. These ratings are based solely on the climate and do not take into account other factors such as accommodation prices and how busy it is likely to be.
Average temperatures in Sarnia
Sarnia weather by month
Please note our recommendations for when to visit Sarnia are based solely on the weather and do not take into accounts accommodation prices, how busy it will be and what events are on.
January
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| -2°C | 57mm | 3.1hrs | 10.5hrs | 2°C |
January is a reasonably dry month in Sarnia and the temperature is generally cold.
Based on weather alone, this is probably a time of year to avoid going to Sarnia for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
January is in the winter in Sarnia and is typically the coldest month of the year. Daytime maximum temperatures average around a freezing -2°C (29°F), whilst at night -9°C (16°F) is normal.
On average January is the driest month of the year in Sarnia with around 57mm 2.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 3.1 hours of sunshine per day.
February
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| -1°C | 54mm | 4.1hrs | 11.5hrs | 1°C |
February in Sarnia is generally reasonably dry with the temperature being cold.
Based on weather alone, this is probably a time of year to avoid going to Sarnia for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
February is in the winter in Sarnia and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a freezing -1°C (31°F), whilst at night -8°C (17°F) is normal.
On average February is the 2nd driest month of the year in Sarnia with around 54mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.1 hours of sunshine per day.
March
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 4°C | 63mm | 4.7hrs | 12.8hrs | 2°C |
The weather in March in Sarnia is characteristically cool and reasonably dry.
Based on weather alone, this is probably a time of year to avoid going to Sarnia for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
March is in the spring in Sarnia and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cold 5°C (41°F), whilst at night -3°C (26°F) is normal.
On average March is the 3rd driest month of the year in Sarnia with around 63mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.7 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 11°C | 75mm | 6.8hrs | 14.3hrs | 4°C |
Sarnia's weather in April is typically cool and reasonably dry in nature.
Although outside the main holiday season, there is still plenty of relatively acceptable weather around this time of year. This makes it an okay time to visit Sarnia.
April is in the spring in Sarnia and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 12°C (54°F), whilst at night 2°C (36°F) is normal.
On average April is the 4th driest month of the year in Sarnia with around 75mm 2.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.8 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 17°C | 68mm | 8.4hrs | 15.7hrs | 9°C |
May is a reasonably dry month in Sarnia and the temperature is generally mild.
Although outside the main holiday season, there is still plenty of reasonably acceptable weather around this time of year. This makes it an okay time to visit Sarnia.
May is in the spring in Sarnia and is typically the 5th coldest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 8°C (46°F) is normal.
On average May is the 5th driest month of the year in Sarnia with around 68mm 2.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.4 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 22°C | 82mm | 9.5hrs | 10.5hrs | 16°C |
The climate in Sarnia during June can be summarized as warm and a little damp.
It is perhaps the perfect month to visit Sarnia, with some extremely good weather at this time of year.
June is in the summer in Sarnia and is typically the 6th coldest month of the year. Daytime maximum temperatures average around 24°C (76°F), whilst at night 13°C (56°F) is normal.
On average June is the 6th driest month of the year in Sarnia with around 82mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.5 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 24°C | 71mm | 9.9hrs | 11.5hrs | 22°C |
July in Sarnia is generally reasonably dry with the temperature being warm.
It is perhaps the perfect month to visit Sarnia, with some particularly good weather at this time of year.
July is in the summer in Sarnia and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 16°C (61°F) is normal.
On average July is the 6th wettest month of the year in Sarnia with around 71mm 2.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.9 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 23°C | 71mm | 8.2hrs | 12.8hrs | 23°C |
The weather in August in Sarnia is characteristically warm, humid and reasonably dry.
It is perhaps the perfect month to visit Sarnia, with some inordinately good weather at this time of year.
August is in the summer in Sarnia and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 16°C (60°F) is normal.
On average August is the 5th wettest month of the year in Sarnia with around 71mm 2.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.2 hours of sunshine per day.
September
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 20°C | 76mm | 6.6hrs | 14.3hrs | 20°C |
Sarnia's weather in September is typically mild and reasonably dry in nature.
It is perhaps a good month to visit Sarnia, with some inordinately good weather at this time of year.
September is in the fall / autumn in Sarnia and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 12°C (54°F) is normal.
On average September is the 4th wettest month of the year in Sarnia with around 76mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.6 hours of sunshine per day.
October
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 14°C | 60mm | 5.5hrs | 15.7hrs | 15°C |
October is a reasonably dry month in Sarnia and the temperature is generally mild.
It is perhaps a good month to visit Sarnia, with some extremely good weather at this time of year.
October is in the fall / autumn in Sarnia and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a cool 16°C (60°F), whilst at night 6°C (44°F) is normal.
On average October is the 3rd wettest month of the year in Sarnia with around 60mm 2.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.5 hours of sunshine per day.
November
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 7°C | 78mm | 3.1hrs | 10.5hrs | 10°C |
November in Sarnia is generally reasonably dry with the temperature being cool.
Based on weather alone, this is probably a time of year to avoid going to Sarnia for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
November is in the fall / autumn in Sarnia and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a cold 8°C (46°F), whilst at night 1°C (34°F) is normal.
On average November is the 2nd wettest month of the year in Sarnia with around 78mm 3.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 3.1 hours of sunshine per day.
December
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 1°C | 75mm | 2.3hrs | 11.5hrs | 5°C |
December in Sarnia is generally reasonably dry with the temperature being cold.
Based on weather alone, this is probably a time of year to avoid going to Sarnia for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
December is in the winter in Sarnia and is typically the warmest month of the year. Daytime maximum temperatures average around a freezing 1°C (34°F), whilst at night -5°C (23°F) is normal.
On average December is the wettest month of the year in Sarnia with around 75mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 2.3 hours of sunshine per day.
Other monthly averages
Sarnia weather stats
| Hottest month: | July | 26.5°C 79.7°F |
|---|---|---|
| Driest month: | February | 54mm 2.1ins |
| Sunniest month: | July | 9.9hrs |
| Coldest month: | January | -1.9°C 28.6°F |
| Wettest month: | June | 82mm 3.2ins |
| Warmest sea: | August | 23°C 73.4°F |
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