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Crystal Lake, IA

79°F
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Crystal Lake

Iowa

79°
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Crystal Lake, IA Weather
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Chevron right

12 AM

77°
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 7%
Chevron down
Partly cloudy

WindS 10 mph

Air QualityFair

Wind Gusts20 mph

Humidity97%

Indoor Humidity95% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

1 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 5%
Chevron down
Partly cloudy

WindS 10 mph

Air QualityFair

Wind Gusts18 mph

Humidity98%

Indoor Humidity95% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

2 AM

76°
RealFeel® 83°
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

WindS 12 mph

Air QualityFair

Wind Gusts21 mph

Humidity98%

Indoor Humidity95% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

3 AM

76°
RealFeel® 82°
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

WindS 12 mph

Air QualityFair

Wind Gusts22 mph

Humidity98%

Indoor Humidity95% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover44%

Visibility10 mi

Cloud Ceiling30000 ft

4 AM

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

WindS 12 mph

Air QualityFair

Wind Gusts23 mph

Humidity97%

Indoor Humidity95% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling30000 ft

5 AM

75°
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Partly cloudy

WindS 12 mph

Air QualityFair

Wind Gusts23 mph

Humidity96%

Indoor Humidity95% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover31%

Visibility10 mi

Cloud Ceiling30000 ft

6 AM

75°
RealFeel® 79°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Partly sunny

RealFeel Shade™79°

WindSSE 12 mph

Air QualityFair

Max UV Index0.5 (Low)

Wind Gusts22 mph

Humidity95%

Indoor Humidity95% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

7 AM

76°
RealFeel® 81°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Partly sunny

RealFeel Shade™79°

WindSSE 13 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts22 mph

Humidity89%

Indoor Humidity89% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™7 (Bright)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

8 AM

78°
RealFeel® 82°
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 cloudy

RealFeel Shade™81°

Heat Index80°

WindS 15 mph

Air QualityFair

Max UV Index1.8 (Low)

Wind Gusts22 mph

Humidity81%

Indoor Humidity81% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

9 AM

81°
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 cloudy

RealFeel Shade™83°

Heat Index85°

WindS 16 mph

Air QualityFair

Max UV Index2.7 (Moderate)

Wind Gusts23 mph

Humidity75%

Indoor Humidity75% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

10 AM

84°
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 cloudy

RealFeel Shade™85°

Heat Index89°

WindS 17 mph

Air QualityFair

Max UV Index3.8 (Moderate)

Wind Gusts28 mph

Humidity69%

Indoor Humidity69% (Extremely Humid)

Dew Point72° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

11 AM

86°
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 cloudy

RealFeel Shade™87°

Heat Index92°

WindS 20 mph

Air QualityFair

Max UV Index5.7 (High)

Wind Gusts31 mph

Humidity65%

Indoor Humidity65% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

12 PM

88°
RealFeel® 95°
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 cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

RealFeel Shade™90°

Heat Index96°

WindS 21 mph

Air QualityFair

Max UV Index7.3 (High)

Wind Gusts36 mph

Humidity62%

Indoor Humidity62% (Extremely Humid)

Dew Point73° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

1 PM

90°
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 0%
Chevron down
Mostly cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

RealFeel Shade™92°

Heat Index99°

WindS 21 mph

Air QualityFair

Max UV Index8.0 (Very High)

Wind Gusts39 mph

Humidity59%

Indoor Humidity59% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

2 PM

91°
RealFeel® 99°
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 cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

RealFeel Shade™94°

Heat Index101°

WindS 21 mph

Air QualityPoor

Max UV Index7.3 (High)

Wind Gusts44 mph

Humidity58%

Indoor Humidity58% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

3 PM

92°
RealFeel® 99°
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 cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

RealFeel Shade™96°

Heat Index103°

WindS 21 mph

Air QualityPoor

Max UV Index5.7 (High)

Wind Gusts45 mph

Humidity57%

Indoor Humidity57% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

93°
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 0%
Chevron down
Mostly cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

RealFeel Shade™97°

Heat Index105°

WindS 21 mph

Air QualityPoor

Max UV Index3.8 (Moderate)

Wind Gusts45 mph

Humidity56%

Indoor Humidity56% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

93°
RealFeel® 99°
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 cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

RealFeel Shade™97°

Heat Index105°

WindS 20 mph

Air QualityPoor

Max UV Index2.7 (Moderate)

Wind Gusts44 mph

Humidity58%

Indoor Humidity58% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

92°
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 0%
Chevron down
Mostly cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

RealFeel Shade™96°

Heat Index103°

WindS 18 mph

Air QualityPoor

Max UV Index1.8 (Low)

Wind Gusts40 mph

Humidity60%

Indoor Humidity60% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

90°
RealFeel® 95°
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 2%
Chevron down
Mostly cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

RealFeel Shade™94°

Heat Index101°

WindSSW 17 mph

Air QualityPoor

Max UV Index1.0 (Low)

Wind Gusts36 mph

Humidity63%

Indoor Humidity63% (Extremely Humid)

Dew Point76° F

AccuLumen Brightness Index™4 (Dull)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

88°
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 19%
Chevron down
Partly sunny
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

RealFeel Shade™93°

Heat Index98°

WindSSW 17 mph

Air QualityPoor

Max UV Index0.5 (Low)

Wind Gusts33 mph

Humidity65%

Indoor Humidity65% (Extremely Humid)

Dew Point75° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

85°
RealFeel® 89°
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 19%
Chevron down
Partly cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

Heat Index93°

WindSSW 16 mph

Air QualityPoor

Wind Gusts31 mph

Humidity70%

Indoor Humidity70% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

83°
RealFeel® 86°
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 24%
Chevron down
Partly cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

Heat Index89°

WindSSW 15 mph

Air QualityPoor

Wind Gusts27 mph

Humidity75%

Indoor Humidity75% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

81°
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 47%
Chevron down
Partly cloudy
alerts

Extreme Heat Warning

12:00 PM Monday - 9:00 PM Tuesday

Heat Index85°

WindSSW 14 mph

Air QualityPoor

Wind Gusts23 mph

Humidity79%

Indoor Humidity79% (Extremely Humid)

Dew Point74° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover45%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for Crystal Lake

AccuWeather's hourly forecast for Crystal Lake provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 77° with a RealFeel® of 84°, partly cloudy with a 7% 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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Weather Near Crystal Lake:

  • Austin, MN
  • Mason City, IA
  • Rochester, MN
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