St. Thomas Weather in May
St. Thomas in May
The short of it: St. Thomas in May averages a high of 19 °C (66 °F) and a low of 8 °C (46 °F), with 92 mm (3.6 in) of rain and about 14 h 37 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 8° · rain 92 mm · daylight 14 h 37 min
✦✦✦ Fair for a visit · best months: September & June
Thirty years of records give St. Thomas an average May high of 19°, a low of 8° and some 92 mm of rain. Spring takes hold here: highs climb 7° from April to about 19°, with nights near 8°. It is the wettest month of the year here, about 92 mm.
The sun is up for about 14 h 37 min in mid-May, 77 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. Thomas runs about middling and drier than most in May. Aylmer, 16 km to the E, sees much the same highs.
May in St. Thomas, by the numbers
- Warmth rank
- 5th warmest of 12
- Rain rank
- 1st wettest of 12
- Versus April
- 7° warmer, 4.0 mm more rain
- Versus June
- 5° colder
- Day–night spread
- 11°
- Snow season
- Dec–Mar
- Daylight, mid-month
- 14 h 37 min
- Average wind
- 13 km/h
Neighbouring Towns
May averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| AylmerOntario | 16 km E | 19° | 8° | 90 mm |
| LondonOntario | 24 km N | 20° | 9° | 93 mm |
| DorchesterOntario | 25 km NNE | 19° | 8° | 93 mm |
| IngersollOntario | 38 km NE | 19° | 8° | 95 mm |
| TillsonburgOntario | 38 km ENE | 19° | 8° | 89 mm |
| StrathroyOntario | 41 km WNW | 19° | 8° | 88 mm |
| St. MarysOntario | 53 km N | 18° | 7° | 93 mm |
| WoodstockOntario | 53 km NE | 19° | 8° | 97 mm |