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Over 250 million face dangerous heat dome into 4th of July weekend. Click for details. Chevron right

St. Johns, MI

90°F
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St. Johns

Michigan

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St. Johns, MI Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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6 PM

89°
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 51%
Chevron down
Mostly cloudy w/ t-storms
alerts

Extreme Heat Warning

2:00 PM Monday - 8:00 PM Thursday

RealFeel Shade™92°

Heat Index96°

WindS 10 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts16 mph

Humidity60%

Indoor Humidity60% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™7 (Bright)

Cloud Cover59%

Visibility10 mi

Cloud Ceiling10000 ft

7 PM

87°
RealFeel® 94°
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 44%
Chevron down
Intermittent clouds
alerts

Extreme Heat Warning

2:00 PM Monday - 8:00 PM Thursday

RealFeel Shade™94°

Heat Index96°

WindS 9 mph

Air QualityFair

Max UV Index0.9 (Low)

Wind Gusts14 mph

Humidity66%

Indoor Humidity66% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™6 (Medium)

Cloud Cover63%

Visibility10 mi

Cloud Ceiling15600 ft

8 PM

87°
RealFeel® 94°
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
Partly sunny
alerts

Extreme Heat Warning

2:00 PM Monday - 8:00 PM Thursday

RealFeel Shade™94°

Heat Index96°

WindS 9 mph

Air QualityFair

Max UV Index0.5 (Low)

Wind Gusts13 mph

Humidity67%

Indoor Humidity67% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

84°
RealFeel® 91°
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
Partly sunny
alerts

Extreme Heat Warning

2:00 PM Monday - 8:00 PM Thursday

RealFeel Shade™91°

Heat Index92°

WindS 8 mph

Air QualityFair

Max UV Index0.0 (Low)

Wind Gusts12 mph

Humidity73%

Indoor Humidity73% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

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
Partly cloudy
alerts

Extreme Heat Warning

2:00 PM Monday - 8:00 PM Thursday

Heat Index87°

WindS 7 mph

Air QualityFair

Wind Gusts10 mph

Humidity81%

Indoor Humidity81% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

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
Partly cloudy
alerts

Extreme Heat Warning

2:00 PM Monday - 8:00 PM Thursday

Heat Index80°

WindS 7 mph

Air QualityFair

Wind Gusts9 mph

Humidity87%

Indoor Humidity87% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for St. Johns

AccuWeather's hourly forecast for St. Johns provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 89° with a RealFeel® of 93°, mostly cloudy w/ t-storms with a 51% 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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