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St. Thomas, Ontario

74°F
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St. Thomas

Ontario

74°
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St. Thomas, Ontario Weather
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3 AM

74°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

WindWSW 6 mph

Air QualityFair

Wind Gusts14 mph

Humidity90%

Indoor Humidity90% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

4 AM

74°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

WindWSW 5 mph

Air QualityFair

Wind Gusts13 mph

Humidity91%

Indoor Humidity91% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

5 AM

74°
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

WindWSW 5 mph

Air QualityFair

Wind Gusts12 mph

Humidity90%

Indoor Humidity90% (Very Humid)

Dew Point71° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

6 AM

75°
RealFeel® 80°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™80°

WindWSW 6 mph

Air QualityFair

Max UV Index0.4 (Low)

Wind Gusts14 mph

Humidity90%

Indoor Humidity90% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

7 AM

76°
RealFeel® 84°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™81°

WindSW 6 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts15 mph

Humidity89%

Indoor Humidity89% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

8 AM

79°
RealFeel® 88°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™85°

Heat Index81°

WindSW 7 mph

Air QualityFair

Max UV Index2.2 (Low)

Wind Gusts17 mph

Humidity83%

Indoor Humidity83% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

9 AM

82°
RealFeel® 93°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
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Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™88°

Heat Index89°

WindSW 8 mph

Air QualityPoor

Max UV Index3.4 (Moderate)

Wind Gusts18 mph

Humidity77%

Indoor Humidity77% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover12%

Visibility10 mi

Cloud Ceiling30000 ft

10 AM

85°
RealFeel® 97°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™91°

Heat Index94°

WindWSW 9 mph

Air QualityFair

Max UV Index4.8 (Moderate)

Wind Gusts20 mph

Humidity71%

Indoor Humidity71% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover23%

Visibility10 mi

Cloud Ceiling30000 ft

11 AM

88°
RealFeel® 101°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™94°

Heat Index98°

WindWSW 10 mph

Air QualityFair

Max UV Index7.2 (High)

Wind Gusts22 mph

Humidity65%

Indoor Humidity65% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

12 PM

90°
RealFeel® 102°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™95°

Heat Index100°

WindSW 12 mph

Air QualityFair

Max UV Index9.3 (Very High)

Wind Gusts21 mph

Humidity62%

Indoor Humidity62% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

1 PM

90°
RealFeel® 103°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™95°

Heat Index101°

WindSW 13 mph

Air QualityFair

Max UV Index10.2 (Very High)

Wind Gusts21 mph

Humidity60%

Indoor Humidity60% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

2 PM

91°
RealFeel® 103°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™96°

Heat Index102°

WindSW 13 mph

Air QualityFair

Max UV Index9.3 (Very High)

Wind Gusts21 mph

Humidity59%

Indoor Humidity59% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

3 PM

92°
RealFeel® 104°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™98°

Heat Index103°

WindSW 13 mph

Air QualityFair

Max UV Index7.2 (High)

Wind Gusts21 mph

Humidity56%

Indoor Humidity56% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

91°
RealFeel® 101°
Very Hot
RealFeel Guide
Very Hot
101° to 107°
Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™96°

Heat Index102°

WindSW 13 mph

Air QualityFair

Max UV Index4.8 (Moderate)

Wind Gusts21 mph

Humidity59%

Indoor Humidity59% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover24%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

90°
RealFeel® 100°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™96°

Heat Index101°

WindSW 12 mph

Air QualityFair

Max UV Index3.4 (Moderate)

Wind Gusts22 mph

Humidity61%

Indoor Humidity61% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover20%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

89°
RealFeel® 98°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 7%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™95°

Heat Index99°

WindSW 10 mph

Air QualityFair

Max UV Index2.2 (Low)

Wind Gusts18 mph

Humidity63%

Indoor Humidity63% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

87°
RealFeel® 96°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 5%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™93°

Heat Index96°

WindSW 8 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts16 mph

Humidity67%

Indoor Humidity67% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover23%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

84°
RealFeel® 92°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™92°

Heat Index92°

WindWSW 7 mph

Air QualityFair

Max UV Index0.4 (Low)

Wind Gusts13 mph

Humidity74%

Indoor Humidity74% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover24%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

82°
RealFeel® 90°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

RealFeel Shade™90°

Heat Index89°

WindW 6 mph

Air QualityFair

Max UV Index0.0 (Low)

Wind Gusts12 mph

Humidity78%

Indoor Humidity78% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover17%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

81°
RealFeel® 88°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

Heat Index86°

WindW 5 mph

Air QualityFair

Wind Gusts12 mph

Humidity81%

Indoor Humidity81% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

78°
RealFeel® 85°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Orange Warning - Heat

4:47 PM Wednesday - 12:00 AM Sunday

Heat Index80°

WindW 5 mph

Air QualityFair

Wind Gusts10 mph

Humidity85%

Indoor Humidity85% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for St. Thomas

AccuWeather's hourly forecast for St. Thomas provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 74° with a RealFeel® of 78°, mostly clear with a 0% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

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