Weather in St. Thomas in August

General weather information about St. Thomas

Average annual temperature is 9.8 °C

Absolute maximum temperature: 32.5 °C

Absolute minimum temperature: -22.0 °C

Number of sunny days: 136 days

Number of rainy days: 206 days

Number of snow days: 23 days

Look at detailed online map of St. Thomas

* Weather data for St. Thomas Canada is based on climate observations for 2026 year

St. Thomas air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	9.6	13.6	11.3	25.0	29.2	32.5	29.4	28.8	30.4	25.1	13.8	12.2
Average daytime temperature (°C)	3.1	4.6	5.2	13.7	19.8	24.1	25.7	24.1	22.2	15.1	7.8	6.2
Average temperature (°C)	-0.2	-1.0	0.6	8.1	13.4	18.7	21.2	19.4	17.5	11.7	3.9	3.3
Average night temperature (°C)	-2.8	-5.2	-3.2	3.3	7.4	13.7	16.8	15.2	13.6	8.5	0.1	0.7
Absolute minimum temperature (°C)	-15.3	-22.0	-11.9	-5.7	1.3	9.0	12.4	8.9	7.2	-4.3	-7.2	-4.9

St. Thomas monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	9.0	11.0	12.0	14.0	15.0	15.0	15.0	14.0	13.0	11.0	10.0	9.0
Daylight mean duration (h)	9.4	10.5	11.9	13.4	14.6	15.3	15.0	13.9	12.5	11.1	9.8	9.1
Daylight minimum duration (h)	9.0	9.0	11.0	12.0	14.0	15.0	14.0	13.0	11.0	10.0	9.0	9.0
Sunshine mean duration (h)	2.9	6.8	6.4	8.4	11.5	12.0	11.4	10.3	9.5	5.6	5.4	3.2
Precipitation (mm)	94	84	102	133	37	62	127	130	27	72	56	76
Sunny days	11	11	9	11	22	13	0	9	16	7	15	12
Rainy days	14	12	15	19	9	17	31	22	14	24	13	16
Snow days	6	5	7	0	0	0	0	0	0	0	2	3

St. Thomas - weather forecast by months

St. Thomas weather in january St. Thomas weather in february St. Thomas weather in march St. Thomas weather in april St. Thomas weather in may St. Thomas weather in june St. Thomas weather in july St. Thomas weather in august St. Thomas weather in september St. Thomas weather in october St. Thomas weather in november St. Thomas weather in december

Best time to visit St. Thomas:

The best time to visit St. Thomas during the most sunny months:

May — 11.5(h)
June — 12.0(h)
July — 11.4(h)
August — 10.3(h)

Months with the longest average daylight duration in St. Thomas:

June — 15.3(h)

The largest precipitation sum in St. Thomas is at

April — 133(mm)

July — 127(mm)

August — 130(mm)

Weather forecast in the closest to St. Thomas admin centers