What is the weather in DeKalb right now?

Current weather in DeKalb is thunderstorm with rain.

Where can I find the hourly weather forecast for DeKalb?

This page shows hourly weather forecast for DeKalb, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for DeKalb updated regularly?

Weather data for DeKalb is updated regularly with the latest available observations and forecasts.

Now · 4:47 AM

DeKalb Weather & Hourly Forecast

United States · Illinois · 60115

71°F

Thunderstorms

Feels like: 72°F

💧 Humidity 90% 🌡 Pressure 30.03 inHg 💨 Wind 9 mph 👁 Visibility 1.7 mi ☁ Clouds 100% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for DeKalb

Today

5:00 AM

Thunderstorms

71° 💧 0.334 in 💨 9 mph H 90%30.03 inHg

8:00 AM

Light thunderstorms

71° 💧 0.078 in 💨 8 mph H 93%30.00 inHg

11:00 AM

Light rain

77° 💧 0.011 in 💨 9 mph H 84%30.00 inHg

2:00 PM

Overcast

81° 💧 0.000 in 💨 9 mph H 70%29.97 inHg

5:00 PM

Partly cloudy

81° 💧 None 💨 6 mph H 66%29.94 inHg

8:00 PM

Mostly cloudy night

74° 💧 None 💨 3 mph H 86%29.94 inHg

11:00 PM

Mostly clear night

71° 💧 None 💨 5 mph H 91%29.97 inHg

Tomorrow

2:00 AM

Overcast night

69° 💧 None 💨 8 mph H 91%29.97 inHg

5:00 AM

Overcast night

66° 💧 None 💨 7 mph H 82%30.00 inHg

8:00 AM

Overcast

65° 💧 None 💨 7 mph H 81%30.00 inHg

11:00 AM

Mostly cloudy

72° 💧 None 💨 4 mph H 65%30.03 inHg

2:00 PM

Sunny

76° 💧 None 💨 5 mph H 49%30.00 inHg

5:00 PM

Sunny

75° 💧 None 💨 6 mph H 50%29.94 inHg

8:00 PM

Clear night

67° 💧 None 💨 4 mph H 71%29.97 inHg

11:00 PM

Clear night

64° 💧 None 💨 1 mph H 77%30.00 inHg

Friday

2:00 AM

Clear night

60° 💧 None 💨 4 mph H 90%30.00 inHg

Today

5:00 AM

Thunderstorms

71° 💧 0.183 in 💨 9 mph H 90%30.03 inHg

6:00 AM

Light rain

71° 💧 0.091 in 💨 9 mph H 92%30.00 inHg

7:00 AM

Light thunderstorms

71° 💧 0.060 in 💨 9 mph H 92%30.00 inHg

8:00 AM

Light thunderstorms

71° 💧 0.027 in 💨 8 mph H 93%30.00 inHg

9:00 AM

Light rain

74° 💧 0.023 in 💨 9 mph H 91%30.00 inHg

10:00 AM

Light rain

75° 💧 0.028 in 💨 7 mph H 90%30.00 inHg

11:00 AM

Light rain

77° 💧 0.007 in 💨 9 mph H 84%30.00 inHg

12:00 PM

Mostly cloudy

78° 💧 0.003 in 💨 8 mph H 82%30.00 inHg

1:00 PM

Mostly cloudy

81° 💧 0.002 in 💨 10 mph H 73%29.97 inHg

2:00 PM

Overcast

81° 💧 None 💨 9 mph H 70%29.97 inHg

3:00 PM

Overcast

81° 💧 0.000 in 💨 7 mph H 70%29.97 inHg

4:00 PM

Mostly cloudy

81° 💧 0.000 in 💨 7 mph H 69%29.94 inHg

5:00 PM

Partly cloudy

81° 💧 None 💨 6 mph H 66%29.94 inHg

6:00 PM

Overcast

79° 💧 None 💨 4 mph H 72%29.94 inHg

7:00 PM

Overcast

76° 💧 None 💨 3 mph H 82%29.94 inHg

8:00 PM

Mostly cloudy night

74° 💧 None 💨 3 mph H 86%29.94 inHg

9:00 PM

Mostly clear night

72° 💧 None 💨 4 mph H 89%29.97 inHg

10:00 PM

Mostly clear night

71° 💧 None 💨 4 mph H 90%29.97 inHg

11:00 PM

Mostly clear night

71° 💧 None 💨 5 mph H 91%29.97 inHg

Tomorrow

12:00 AM

Clear night

70° 💧 None 💨 6 mph H 91%29.97 inHg

1:00 AM

Partly cloudy night

69° 💧 None 💨 6 mph H 91%29.94 inHg

2:00 AM

Overcast night

69° 💧 None 💨 8 mph H 91%29.97 inHg

3:00 AM

Overcast night

68° 💧 None 💨 7 mph H 87%29.97 inHg

4:00 AM

Overcast night

67° 💧 None 💨 7 mph H 84%29.97 inHg

5:00 AM

Overcast night

66° 💧 None 💨 7 mph H 82%30.00 inHg

6:00 AM

Overcast night

65° 💧 None 💨 7 mph H 81%30.00 inHg

7:00 AM

Overcast

64° 💧 None 💨 7 mph H 82%30.00 inHg

8:00 AM

Overcast

65° 💧 None 💨 7 mph H 81%30.00 inHg

9:00 AM

Overcast

67° 💧 None 💨 4 mph H 79%30.03 inHg

10:00 AM

Overcast

69° 💧 None 💨 4 mph H 75%30.03 inHg

11:00 AM

Mostly cloudy

72° 💧 None 💨 4 mph H 65%30.03 inHg

12:00 PM

Overcast

74° 💧 None 💨 5 mph H 56%30.03 inHg

1:00 PM

Partly cloudy

75° 💧 None 💨 6 mph H 52%30.00 inHg

2:00 PM

Sunny

76° 💧 None 💨 5 mph H 49%30.00 inHg

3:00 PM

Sunny

76° 💧 None 💨 6 mph H 49%29.97 inHg

4:00 PM

Sunny

76° 💧 None 💨 7 mph H 49%29.97 inHg

5:00 PM

Sunny

75° 💧 None 💨 6 mph H 50%29.94 inHg

6:00 PM

Sunny

74° 💧 None 💨 5 mph H 59%29.94 inHg

7:00 PM

Sunny

70° 💧 None 💨 3 mph H 70%29.94 inHg

8:00 PM

Clear night

67° 💧 None 💨 4 mph H 71%29.97 inHg

9:00 PM

Clear night

65° 💧 None 💨 3 mph H 74%29.97 inHg

10:00 PM

Clear night

64° 💧 None 💨 2 mph H 76%30.00 inHg

11:00 PM

Clear night

64° 💧 None 💨 1 mph H 77%30.00 inHg

Friday

12:00 AM

Clear night

62° 💧 None 💨 4 mph H 82%30.00 inHg

1:00 AM

Clear night

61° 💧 None 💨 4 mph H 85%30.00 inHg

2:00 AM

Clear night

60° 💧 None 💨 4 mph H 90%30.00 inHg

3:00 AM

Clear night

60° 💧 None 💨 5 mph H 93%30.00 inHg

4:00 AM

Clear night

60° 💧 None 💨 4 mph H 95%30.00 inHg

5:00 AM

Clear night

59° 💧 0.000 in 💨 5 mph H 95%30.03 inHg

6:00 AM

Clear night

59° 💧 None 💨 5 mph H 96%30.03 inHg

7:00 AM

Sunny

59° 💧 None 💨 5 mph H 96%30.03 inHg

8:00 AM

Sunny

62° 💧 None 💨 6 mph H 92%30.03 inHg

9:00 AM

Sunny

66° 💧 None 💨 5 mph H 82%30.03 inHg

10:00 AM

Sunny

70° 💧 None 💨 6 mph H 70%30.03 inHg

11:00 AM

Sunny

72° 💧 None 💨 7 mph H 61%30.00 inHg

12:00 PM

Sunny

74° 💧 None 💨 8 mph H 55%30.00 inHg

1:00 PM

Sunny

75° 💧 None 💨 8 mph H 53%29.97 inHg

2:00 PM

Sunny

76° 💧 None 💨 8 mph H 51%29.94 inHg

3:00 PM

Sunny

77° 💧 None 💨 7 mph H 50%29.94 inHg

4:00 PM

Sunny

77° 💧 None 💨 7 mph H 50%29.91 inHg

5:00 PM

Sunny

76° 💧 None 💨 7 mph H 50%29.91 inHg

6:00 PM

Sunny

74° 💧 None 💨 5 mph H 59%29.88 inHg

7:00 PM

Sunny

70° 💧 None 💨 4 mph H 67%29.88 inHg

10:00 PM

Clear night

65° 💧 None 💨 8 mph H 68%29.88 inHg

Saturday

1:00 AM

Overcast night

63° 💧 None 💨 7 mph H 75%29.88 inHg

4:00 AM

Mostly clear night

64° 💧 None 💨 9 mph H 84%29.85 inHg

7:00 AM

Mostly sunny

65° 💧 None 💨 10 mph H 91%29.85 inHg

10:00 AM

Partly cloudy

74° 💧 None 💨 9 mph H 81%29.88 inHg

1:00 PM

Overcast

82° 💧 None 💨 11 mph H 68%29.85 inHg

4:00 PM

Overcast

82° 💧 None 💨 9 mph H 66%29.85 inHg

7:00 PM

Partly cloudy

76° 💧 None 💨 5 mph H 83%29.88 inHg

10:00 PM

Clear night

72° 💧 None 💨 2 mph H 91%29.94 inHg

Sunday

1:00 AM

Clear night

69° 💧 None 💨 4 mph H 95%29.97 inHg

4:00 AM

Partly cloudy night

65° 💧 None 💨 5 mph H 91%30.00 inHg

7:00 AM

Overcast

65° 💧 None 💨 6 mph H 80%30.03 inHg

10:00 AM

Partly cloudy

74° 💧 None 💨 4 mph H 64%30.03 inHg

1:00 PM

Mostly cloudy

82° 💧 None 💨 6 mph H 63%30.00 inHg

4:00 PM

Mostly cloudy

84° 💧 None 💨 6 mph H 60%29.94 inHg

7:00 PM

Mostly cloudy

79° 💧 None 💨 4 mph H 75%29.91 inHg

10:00 PM

Partly cloudy night

75° 💧 None 💨 7 mph H 83%29.91 inHg

Monday

1:00 AM

Mostly cloudy night

73° 💧 None 💨 6 mph H 88%29.94 inHg

4:00 AM

Partly cloudy night

74° 💧 None 💨 9 mph H 82%29.94 inHg

7:00 AM

Mostly cloudy

73° 💧 None 💨 12 mph H 80%29.91 inHg

10:00 AM

Partly cloudy

81° 💧 None 💨 12 mph H 70%29.91 inHg

1:00 PM

Mostly sunny

88° 💧 None 💨 14 mph H 60%29.88 inHg

4:00 PM

Sunny

89° 💧 None 💨 16 mph H 53%29.80 inHg

7:00 PM

Sunny

85° 💧 None 💨 14 mph H 62%29.77 inHg

Tuesday

1:00 AM

Moderate rain

73° 💧 None 💨 8 mph H 93%29.88 inHg

7:00 AM

Overcast

64° 💧 None 💨 11 mph H 91%30.03 inHg

1:00 PM

Mostly sunny

72° 💧 None 💨 7 mph H 60%30.12 inHg

7:00 PM

Partly cloudy

67° 💧 None 💨 7 mph H 65%30.18 inHg

Wednesday

1:00 AM

Clear night

61° 💧 None 💨 6 mph H 86%30.27 inHg

7:00 AM

Mostly sunny

58° 💧 None 💨 7 mph H 86%30.30 inHg

1:00 PM

Overcast

70° 💧 None 💨 8 mph H 58%30.30 inHg

7:00 PM

Partly cloudy

66° 💧 None 💨 9 mph H 69%30.21 inHg

Thursday

1:00 AM

Overcast night

64° 💧 None 💨 7 mph H 82%30.21 inHg

7:00 AM

Partly cloudy

62° 💧 None 💨 7 mph H 84%30.21 inHg

1:00 PM

Overcast

80° 💧 None 💨 8 mph H 59%30.12 inHg

7:00 PM

Mostly cloudy

77° 💧 None 💨 6 mph H 71%30.03 inHg

Friday

1:00 AM

Light thunderstorms

72° 💧 None 💨 10 mph H 85%30.09 inHg

7:00 AM

Mostly cloudy

70° 💧 None 💨 6 mph H 97%30.06 inHg

1:00 PM

Overcast

77° 💧 None 💨 5 mph H 81%30.06 inHg

7:00 PM

Overcast

72° 💧 None 💨 9 mph H 84%30.03 inHg

Saturday

1:00 AM

Overcast night

67° 💧 None 💨 10 mph H 73%30.03 inHg

7:00 AM

Overcast

65° 💧 None 💨 11 mph H 96%29.97 inHg

1:00 PM

Mostly cloudy

81° 💧 None 💨 10 mph H 73%29.83 inHg

7:00 PM

Clear night

82° 💧 None 💨 8 mph H 75%29.68 inHg

Sunday

1:00 AM

Heavy rain

72° 💧 None 💨 10 mph H 91%29.71 inHg

7:00 AM

Partly cloudy

70° 💧 None 💨 8 mph H 96%29.74 inHg

1:00 PM

Overcast

76° 💧 None 💨 10 mph H 53%29.80 inHg

7:00 PM

Overcast night

68° 💧 None 💨 8 mph H 72%29.83 inHg

Monday

1:00 AM

Partly cloudy night

59° 💧 None 💨 5 mph H 91%29.94 inHg

7:00 AM

Mostly cloudy

54° 💧 None 💨 3 mph H 94%30.00 inHg

1:00 PM

Overcast

70° 💧 None 💨 5 mph H 57%30.03 inHg

7:00 PM

Overcast night

66° 💧 None 💨 6 mph H 71%30.00 inHg

Tuesday

1:00 AM

Partly cloudy night

61° 💧 None 💨 9 mph H 84%30.06 inHg

7:00 AM

Mostly cloudy

60° 💧 None 💨 7 mph H 92%30.06 inHg

1:00 PM

Mostly sunny

75° 💧 None 💨 11 mph H 56%30.12 inHg

7:00 PM

Mostly clear night

67° 💧 None 💨 6 mph H 74%30.12 inHg

Wednesday

1:00 AM

Partly cloudy night

61° 💧 None 💨 5 mph H 90%30.15 inHg

7:00 AM

Mostly sunny

59° 💧 None 💨 2 mph H 97%30.15 inHg

1:00 PM

Partly cloudy

76° 💧 None 💨 1 mph H 58%30.12 inHg

7:00 PM

Mostly cloudy night

72° 💧 None 💨 1 mph H 74%30.00 inHg

In DeKalb and, more broadly, across the state of Illinois: Tonight, expect mostly cloudy skies with temperatures remaining mild to warm, ranging from 84 to 85 degrees Fahrenheit. Winds will be moderate from the southeast at around 10 mph, with occasional gusts reaching up to 21 mph. No rain is expected during the evening and the upcoming hours, so outdoor plans should be comfortable. The breeze might make it feel a bit cooler at times, but overall conditions will stay pleasant. Temperatures will gradually remain steady through the night, providing a mild and calm evening. It's a good evening to enjoy outdoor activities or relax under the partly cloudy sky.

15-Day Weather Outlook for DeKalb

TomorrowTomorrow

Overcast 76°/64° 💧 None 💨 8 mph

Friday, Sep 11Fri Sep 11

Sunny 77°/59° 💧 None 💨 8 mph

Saturday, Sep 12Sat Sep 12

Overcast 82°/63° 💧 0.545 in 💨 11 mph

Sunday, Sep 13Sun Sep 13

Mostly cloudy 84°/65° 💧 0.001 in 💨 6 mph

Monday, Sep 14Mon Sep 14

Mostly cloudy 89°/73° 💧 0.001 in 💨 16 mph

Tuesday, Sep 15Tue Sep 15

Moderate rain 85°/64° 💧 0.169 in 💨 14 mph

Wednesday, Sep 16Wed Sep 16

Partly cloudy 70°/58° 💧 None 💨 8 mph

Thursday, Sep 17Thu Sep 17

Partly cloudy 80°/62° 💧 0.052 in 💨 9 mph

Friday, Sep 18Fri Sep 18

Light thunderstorms 77°/70° 💧 0.252 in 💨 10 mph

Saturday, Sep 19Sat Sep 19

Overcast 81°/65° 💧 0.117 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Heavy rain 82°/70° 💧 0.324 in 💨 10 mph

Monday, Sep 21Mon Sep 21

Overcast 70°/54° 💧 None 💨 8 mph

Tuesday, Sep 22Tue Sep 22

Overcast 75°/60° 💧 0.002 in 💨 11 mph

Wednesday, Sep 23Wed Sep 23

Mostly sunny 76°/59° 💧 None 💨 6 mph

Thursday, Sep 24Thu Sep 24

Mostly cloudy 72°/72° 💧 None 💨 1 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in DeKalb

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for DeKalb

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 5:00 AM

PM2.5 Fine particles Fair 11,2µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 12,0µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 79,9µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 3,4µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in DeKalb

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 5,2Moderate 🙂Fair

Tomorrow UV 6,1High 🙂Fair

Friday UV 6,6High 😐Moderate

Saturday UV 5,0Moderate 🙂Fair

Sunday UV 5,0Moderate 😊Good

Monday UV 5,0Moderate —Unavailable

Tuesday UV 6,0High —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,2 9:00 AMUV 1,7 10:00 AMUV 1,7 11:00 AMUV 1,8 12:00 PMUV 3,7 1:00 PMUV 5,2 2:00 PMUV 3,1 3:00 PMUV 1,9 4:00 PMUV 1,6 5:00 PMUV 1,2 6:00 PMUV 0,3

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for DeKalb

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · DEKALB, ILLINOIS

Tonight's Stargazing & Shooting Stars

Local night-sky conditions and meteor activity for Jasper.

0/100Best-hour score

No good viewing window tonight Astronomical darkness exists, but current sky conditions are unfavorable.

☁ Cloud cover 100% Real hourly forecast for the best viewing hour.

☾ Moonlight 7% Waning Crescent · Moon about 3° above the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 88° high at the best hour.

✦ Estimated visible meteors Poor visibility Meteor activity may occur above the clouds, but local viewing conditions are not suitable.

Chance ≥1 meteor in 30 minNot meaningful

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

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Forecast data for DeKalb were last refreshed today at 4:47 AM. The current forecast period extends through 11/09/2026 at 2:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.