Sarnia Weather in May
Sarnia in May
The short of it: Sarnia in May averages a high of 19 °C (66 °F) and a low of 8 °C (46 °F), with 81 mm (3.2 in) of rain and about 14 h 38 min of daylight. Rated 3 of 5 for a visit; the best months are July and September. Source: TerraClimate climate normals, 1991–2020.
Average high 19° · low 8° · rain 81 mm · daylight 14 h 38 min
✦✦✦ Fair for a visit · best months: July & September
May in Sarnia brings afternoons near 19° and nights around 8°, with about 81 mm of rain over the month. Highs rise 7° against April, to near 19°; nights run about 8°. Wet spells are common — about 81 mm, the 3rd wettest month.
The sun is up for about 14 h 38 min in mid-May, 78 minutes more than a month before.
For the traveller: pack layers, a wool coat and stout boots, and an oilskin besides. The Almanac rates May 3 of 5 for a visit; the finest months here are July and September.
Against its neighbours, Sarnia runs about middling and drier than most in May. Port Huron, 2 km to the WSW, sees much the same highs.
May in Sarnia, by the numbers
- Warmth rank
- 5th warmest of 12
- Rain rank
- 3rd wettest of 12
- Versus April
- 7° warmer, 3.0 mm more rain
- Versus June
- 6° colder
- Day–night spread
- 11°
- Snow season
- Dec–Mar
- Daylight, mid-month
- 14 h 38 min
- Average wind
- 14 km/h
Neighbouring Towns
May averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| Port HuronMichigan | 2 km WSW | 19° | 8° | 81 mm |
| MarysvilleMichigan | 10 km SW | 19° | 8° | 83 mm |
| CorunnaOntario | 11 km SSW | 19° | 8° | 83 mm |
| Saint ClairMichigan | 19 km SSW | 19° | 8° | 83 mm |
| CamlachieOntario | 21 km ENE | 18° | 7° | 87 mm |
| PetroliaOntario | 23 km ESE | 19° | 7° | 91 mm |
| RichmondMichigan | 34 km WSW | 20° | 8° | 80 mm |
| New BaltimoreMichigan | 43 km SW | 20° | 8° | 80 mm |