St. Catharines Weather in May
St. Catharines in May
The short of it: St. Catharines in May averages a high of 19 °C (66 °F) and a low of 9 °C (47 °F), with 82 mm (3.2 in) of rain and about 14 h 39 min of daylight. Rated 3 of 5 for a visit; the best months are September and June. Source: TerraClimate climate normals, 1991–2020.
Average high 19° · low 9° · rain 82 mm · daylight 14 h 39 min
✦✦✦ Fair for a visit · best months: September & June
May in St. Catharines brings afternoons near 19° and nights around 9°, with about 82 mm of rain over the month. Spring takes hold here: highs climb 7° from April to about 19°, with nights near 9°. Wet spells are common — about 82 mm, the 3rd wettest month.
The sun is up for about 14 h 39 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 September and June.
Against its neighbours, St. Catharines runs cooler than most and drier than most in May. Niagara Falls, 16 km to the ESE, sees much the same highs.
May in St. Catharines, by the numbers
- Warmth rank
- 5th warmest of 12
- Rain rank
- 3rd wettest of 12
- Versus April
- 7° warmer, 3.0 mm less rain
- Versus June
- 5° colder
- Day–night spread
- 11°
- Snow season
- Dec–Mar
- Daylight, mid-month
- 14 h 39 min
- Average wind
- 14 km/h
Neighbouring Towns
May averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| Niagara FallsOntario | 16 km ESE | 19° | 9° | 87 mm |
| Niagara FallsNew York | 17 km ESE | 19° | 9° | 87 mm |
| WellandOntario | 21 km S | 19° | 8° | 89 mm |
| GrimsbyOntario | 26 km W | 18° | 8° | 79 mm |
| North TonawandaNew York | 34 km ESE | 19° | 9° | 84 mm |
| Fort ErieOntario | 39 km SE | 19° | 8° | 84 mm |
| AmherstNew York | 42 km ESE | 20° | 9° | 86 mm |
| Stoney CreekOntario | 43 km W | 19° | 9° | 81 mm |