St. Thomas Weather in August
St. Thomas in August
The short of it: St. Thomas in August averages a high of 26 °C (78 °F) and a low of 15 °C (59 °F), with 78 mm (3.1 in) of rain and about 13 h 55 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 26° · low 15° · rain 78 mm · daylight 13 h 55 min
✦✦✦ Fair for a visit · best months: September & June
Thirty years of records give St. Thomas an average August high of 26°, a low of 15° and some 78 mm of rain. Much like July: highs about 26°, nights near 15°. Easy travelling weather. Wet spells are common — about 78 mm, the 9th wettest month.
The sun is up for about 13 h 55 min in mid-August, 67 minutes less than a month before.
For the traveller: pack light clothes and a jacket for the evening, and an oilskin besides. The Almanac rates August 3 of 5 for a visit; the finest months here are September and June.
Against its neighbours, St. Thomas runs warmer than most and wetter than most in August. Aylmer, 16 km to the E, sees much the same highs.
August in St. Thomas, by the numbers
- Warmth rank
- 2nd warmest of 12
- Rain rank
- 9th wettest of 12
- Versus July
- 1° colder, 2.0 mm less rain
- Versus September
- 4° warmer
- Day–night spread
- 11°
- Snow season
- Dec–Mar
- Daylight, mid-month
- 13 h 55 min
- Average wind
- 10 km/h
Neighbouring Towns
August averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| AylmerOntario | 16 km E | 26° | 15° | 79 mm |
| LondonOntario | 24 km N | 27° | 15° | 76 mm |
| DorchesterOntario | 25 km NNE | 26° | 15° | 74 mm |
| IngersollOntario | 38 km NE | 25° | 15° | 76 mm |
| TillsonburgOntario | 38 km ENE | 26° | 15° | 77 mm |
| StrathroyOntario | 41 km WNW | 26° | 15° | 75 mm |
| St. MarysOntario | 53 km N | 25° | 14° | 77 mm |
| WoodstockOntario | 53 km NE | 26° | 15° | 77 mm |