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Current weather in Collinsville is few clouds.

Where can I find the hourly weather forecast for Collinsville?

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

Is the weather forecast for Collinsville updated regularly?

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

Now · 12:17 PM

Collinsville Weather & Hourly Forecast

United States · Illinois · 62234

84°F

Mostly sunny

Feels like: 89°F

💧 Humidity 58% 🌡 Pressure 30.03 inHg 💨 Wind 3 mph 👁 Visibility 21.6 mi ☁ Clouds 17% ☀️ UV index 6.5 · High 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Collinsville

Today

1:00 PM

Mostly sunny

85° 💧 0.000 in 💨 6 mph H 55%30.00 inHg

4:00 PM

Light thunderstorms

83° 💧 0.010 in 💨 8 mph H 58%30.00 inHg

7:00 PM

Sunny

80° 💧 None 💨 7 mph H 57%30.00 inHg

10:00 PM

Clear night

75° 💧 None 💨 8 mph H 58%30.06 inHg

Tomorrow

1:00 AM

Clear night

72° 💧 None 💨 8 mph H 55%30.09 inHg

4:00 AM

Partly cloudy night

70° 💧 None 💨 8 mph H 54%30.09 inHg

7:00 AM

Mostly cloudy

67° 💧 None 💨 9 mph H 55%30.15 inHg

10:00 AM

Mostly cloudy

73° 💧 None 💨 9 mph H 49%30.15 inHg

1:00 PM

Mostly sunny

84° 💧 None 💨 10 mph H 42%30.09 inHg

4:00 PM

Sunny

91° 💧 None 💨 10 mph H 41%29.97 inHg

7:00 PM

Mostly sunny

87° 💧 None 💨 9 mph H 54%29.94 inHg

10:00 PM

Clear night

83° 💧 None 💨 11 mph H 67%30.00 inHg

Tuesday

1:00 AM

Clear night

80° 💧 None 💨 12 mph H 73%29.97 inHg

4:00 AM

Clear night

79° 💧 None 💨 8 mph H 75%30.00 inHg

7:00 AM

Sunny

78° 💧 None 💨 8 mph H 77%30.03 inHg

10:00 AM

Sunny

91° 💧 None 💨 9 mph H 48%30.06 inHg

Today

1:00 PM

Mostly sunny

85° 💧 None 💨 6 mph H 55%30.00 inHg

2:00 PM

Mostly sunny

87° 💧 None 💨 6 mph H 53%30.00 inHg

3:00 PM

Strong thunderstorm

84° 💧 0.000 in 💨 10 mph H 58%30.03 inHg

4:00 PM

Light thunderstorms

83° 💧 0.010 in 💨 8 mph H 58%30.00 inHg

5:00 PM

Sunny

84° 💧 None 💨 8 mph H 54%29.97 inHg

6:00 PM

Sunny

83° 💧 None 💨 7 mph H 54%29.97 inHg

7:00 PM

Sunny

80° 💧 None 💨 7 mph H 57%30.00 inHg

8:00 PM

Clear night

78° 💧 None 💨 7 mph H 59%30.00 inHg

9:00 PM

Mostly clear night

76° 💧 None 💨 8 mph H 58%30.03 inHg

10:00 PM

Clear night

75° 💧 None 💨 8 mph H 58%30.06 inHg

11:00 PM

Clear night

74° 💧 None 💨 8 mph H 58%30.06 inHg

Tomorrow

12:00 AM

Clear night

73° 💧 None 💨 8 mph H 57%30.06 inHg

1:00 AM

Clear night

72° 💧 None 💨 8 mph H 55%30.09 inHg

2:00 AM

Mostly clear night

71° 💧 None 💨 8 mph H 55%30.09 inHg

3:00 AM

Mostly clear night

70° 💧 None 💨 8 mph H 54%30.09 inHg

4:00 AM

Partly cloudy night

70° 💧 None 💨 8 mph H 54%30.09 inHg

5:00 AM

Mostly cloudy night

69° 💧 None 💨 9 mph H 55%30.12 inHg

6:00 AM

Partly cloudy night

68° 💧 None 💨 9 mph H 54%30.12 inHg

7:00 AM

Mostly cloudy

67° 💧 None 💨 9 mph H 55%30.15 inHg

8:00 AM

Mostly cloudy

68° 💧 None 💨 9 mph H 53%30.15 inHg

9:00 AM

Mostly cloudy

70° 💧 None 💨 9 mph H 50%30.15 inHg

10:00 AM

Mostly cloudy

73° 💧 None 💨 9 mph H 49%30.15 inHg

11:00 AM

Mostly cloudy

76° 💧 None 💨 9 mph H 47%30.12 inHg

12:00 PM

Partly cloudy

80° 💧 None 💨 10 mph H 45%30.12 inHg

1:00 PM

Mostly sunny

84° 💧 None 💨 10 mph H 42%30.09 inHg

2:00 PM

Sunny

87° 💧 None 💨 10 mph H 40%30.03 inHg

3:00 PM

Sunny

90° 💧 None 💨 10 mph H 40%30.00 inHg

4:00 PM

Sunny

91° 💧 None 💨 10 mph H 41%29.97 inHg

5:00 PM

Sunny

91° 💧 None 💨 10 mph H 43%29.97 inHg

6:00 PM

Partly cloudy

90° 💧 None 💨 9 mph H 48%29.94 inHg

7:00 PM

Mostly sunny

87° 💧 None 💨 9 mph H 54%29.94 inHg

8:00 PM

Mostly clear night

86° 💧 None 💨 10 mph H 60%29.97 inHg

9:00 PM

Clear night

85° 💧 None 💨 11 mph H 63%29.97 inHg

10:00 PM

Clear night

83° 💧 None 💨 11 mph H 67%30.00 inHg

11:00 PM

Clear night

82° 💧 None 💨 10 mph H 69%30.00 inHg

Tuesday

12:00 AM

Clear night

81° 💧 None 💨 10 mph H 71%30.00 inHg

1:00 AM

Clear night

80° 💧 None 💨 12 mph H 73%29.97 inHg

2:00 AM

Clear night

80° 💧 None 💨 11 mph H 73%29.97 inHg

3:00 AM

Clear night

80° 💧 None 💨 10 mph H 74%29.97 inHg

4:00 AM

Clear night

79° 💧 None 💨 8 mph H 75%30.00 inHg

5:00 AM

Clear night

78° 💧 None 💨 7 mph H 77%30.00 inHg

6:00 AM

Clear night

78° 💧 None 💨 8 mph H 77%30.03 inHg

7:00 AM

Sunny

78° 💧 None 💨 8 mph H 77%30.03 inHg

8:00 AM

Sunny

81° 💧 None 💨 8 mph H 69%30.03 inHg

9:00 AM

Sunny

86° 💧 None 💨 8 mph H 57%30.06 inHg

10:00 AM

Sunny

91° 💧 None 💨 9 mph H 48%30.06 inHg

11:00 AM

Sunny

94° 💧 None 💨 11 mph H 41%30.06 inHg

12:00 PM

Sunny

97° 💧 None 💨 11 mph H 37%30.03 inHg

1:00 PM

Sunny

98° 💧 0.000 in 💨 9 mph H 36%30.03 inHg

2:00 PM

Mostly sunny

100° 💧 0.000 in 💨 8 mph H 34%30.00 inHg

3:00 PM

Partly cloudy

100° 💧 0.000 in 💨 7 mph H 33%30.00 inHg

4:00 PM

Mostly cloudy

99° 💧 0.000 in 💨 6 mph H 33%30.00 inHg

5:00 PM

Mostly sunny

96° 💧 0.003 in 💨 9 mph H 36%30.00 inHg

6:00 PM

Partly cloudy

96° 💧 0.003 in 💨 3 mph H 35%30.00 inHg

7:00 PM

Partly cloudy

89° 💧 0.000 in 💨 8 mph H 52%30.03 inHg

Wednesday

4:00 AM

Mostly clear night

75° 💧 None 💨 4 mph H 95%30.15 inHg

7:00 AM

Sunny

74° 💧 None 💨 5 mph H 97%30.18 inHg

10:00 AM

Sunny

85° 💧 None 💨 3 mph H 69%30.21 inHg

1:00 PM

Sunny

96° 💧 None 💨 7 mph H 36%30.18 inHg

4:00 PM

Sunny

97° 💧 None 💨 7 mph H 30%30.12 inHg

7:00 PM

Sunny

90° 💧 None 💨 4 mph H 42%30.09 inHg

10:00 PM

Clear night

86° 💧 None 💨 10 mph H 49%30.15 inHg

Thursday

1:00 AM

Clear night

83° 💧 None 💨 8 mph H 52%30.15 inHg

4:00 AM

Clear night

80° 💧 None 💨 7 mph H 58%30.15 inHg

7:00 AM

Mostly sunny

79° 💧 None 💨 5 mph H 62%30.18 inHg

10:00 AM

Partly cloudy

89° 💧 None 💨 6 mph H 46%30.18 inHg

1:00 PM

Partly cloudy

95° 💧 None 💨 5 mph H 40%30.15 inHg

4:00 PM

Partly cloudy

92° 💧 None 💨 8 mph H 48%30.12 inHg

7:00 PM

Partly cloudy

88° 💧 None 💨 3 mph H 58%30.12 inHg

10:00 PM

Mostly cloudy night

83° 💧 None 💨 3 mph H 70%30.15 inHg

Friday

1:00 AM

Clear night

79° 💧 None 💨 3 mph H 79%30.15 inHg

4:00 AM

Clear night

77° 💧 None 💨 5 mph H 85%30.15 inHg

7:00 AM

Sunny

75° 💧 None 💨 6 mph H 90%30.15 inHg

10:00 AM

Sunny

83° 💧 None 💨 5 mph H 70%30.18 inHg

1:00 PM

Overcast

90° 💧 None 💨 2 mph H 55%30.12 inHg

4:00 PM

Partly cloudy

90° 💧 None 💨 3 mph H 51%30.03 inHg

7:00 PM

Overcast

80° 💧 None 💨 5 mph H 78%30.03 inHg

10:00 PM

Mostly cloudy night

79° 💧 None 💨 6 mph H 78%30.03 inHg

Saturday

1:00 AM

Clear night

77° 💧 None 💨 7 mph H 72%30.03 inHg

7:00 AM

Sunny

78° 💧 None 💨 7 mph H 81%30.06 inHg

1:00 PM

Sunny

75° 💧 None 💨 7 mph H 89%30.00 inHg

7:00 PM

Sunny

95° 💧 None 💨 7 mph H 40%29.91 inHg

Sunday

1:00 AM

Mostly clear night

93° 💧 None 💨 7 mph H 36%29.80 inHg

7:00 AM

Sunny

85° 💧 None 💨 9 mph H 49%29.83 inHg

1:00 PM

Sunny

79° 💧 None 💨 6 mph H 56%29.85 inHg

7:00 PM

Mostly sunny

98° 💧 None 💨 5 mph H 27%29.85 inHg

Monday

1:00 AM

Light rain

82° 💧 None 💨 5 mph H 79%29.83 inHg

7:00 AM

Sunny

79° 💧 None 💨 6 mph H 71%29.88 inHg

1:00 PM

Mostly sunny

76° 💧 None 💨 6 mph H 73%29.91 inHg

7:00 PM

Clear night

91° 💧 None 💨 4 mph H 44%29.88 inHg

Tuesday

1:00 AM

Partly cloudy night

80° 💧 None 💨 4 mph H 80%29.88 inHg

7:00 AM

Sunny

73° 💧 None 💨 3 mph H 98%29.91 inHg

1:00 PM

Mostly sunny

73° 💧 None 💨 3 mph H 98%29.91 inHg

7:00 PM

Light rain

84° 💧 None 💨 4 mph H 67%29.91 inHg

Wednesday

1:00 AM

Light rain

73° 💧 None 💨 2 mph H 96%29.91 inHg

7:00 AM

Overcast

72° 💧 None 💨 5 mph H 97%29.94 inHg

1:00 PM

Light rain

69° 💧 None 💨 6 mph H 93%29.97 inHg

7:00 PM

Overcast night

79° 💧 None 💨 4 mph H 64%29.97 inHg

Thursday

1:00 AM

Moderate rain

72° 💧 None 💨 4 mph H 89%29.91 inHg

7:00 AM

Light rain

67° 💧 None 💨 6 mph H 94%29.94 inHg

1:00 PM

Mostly sunny

65° 💧 None 💨 6 mph H 96%29.94 inHg

7:00 PM

Partly cloudy night

76° 💧 None 💨 5 mph H 60%29.97 inHg

Friday

1:00 AM

Overcast night

74° 💧 None 💨 3 mph H 70%29.94 inHg

7:00 AM

Sunny

65° 💧 None 💨 5 mph H 80%30.00 inHg

1:00 PM

Sunny

61° 💧 None 💨 3 mph H 94%30.06 inHg

7:00 PM

Partly cloudy night

76° 💧 None 💨 5 mph H 57%30.09 inHg

Saturday

1:00 AM

Clear night

71° 💧 None 💨 3 mph H 73%30.06 inHg

7:00 AM

Partly cloudy

63° 💧 None 💨 3 mph H 86%30.12 inHg

1:00 PM

Sunny

60° 💧 None 💨 0 mph H 92%30.15 inHg

7:00 PM

Mostly clear night

78° 💧 None 💨 3 mph H 57%30.15 inHg

Sunday

1:00 AM

Partly cloudy night

73° 💧 None 💨 4 mph H 73%30.06 inHg

7:00 AM

Partly cloudy

68° 💧 None 💨 5 mph H 81%30.06 inHg

1:00 PM

Partly cloudy

66° 💧 None 💨 4 mph H 86%30.06 inHg

7:00 PM

Mostly cloudy night

81° 💧 None 💨 6 mph H 66%30.00 inHg

Monday

1:00 AM

Partly cloudy night

77° 💧 None 💨 5 mph H 80%29.94 inHg

In Collinsville and, more broadly, across the state of Illinois: The rest of the day will feature a mix of sun and clouds, with temperatures ranging from the mid-60s to the mid-70s. Expect mild to warm conditions, making for a comfortable afternoon. Winds will be coming from the north at around 13 mph, with gusts reaching up to 22 mph, providing some breezy intervals. No precipitation is anticipated, so outdoor plans should be unaffected by weather. Overall, it looks like a pleasant day with moderate winds and seasonal temperatures.

15-Day Weather Outlook for Collinsville

TomorrowTomorrow

Mostly sunny 91°/67° 💧 None 💨 10 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 100°/78° 💧 None 💨 12 mph

Wednesday, Sep 16Wed Sep 16

Partly cloudy 97°/74° 💧 0.079 in 💨 8 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 95°/79° 💧 0.007 in 💨 10 mph

Friday, Sep 18Fri Sep 18

Overcast 90°/75° 💧 0.005 in 💨 6 mph

Saturday, Sep 19Sat Sep 19

Overcast 80°/75° 💧 0.035 in 💨 7 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 95°/79° 💧 0.001 in 💨 9 mph

Monday, Sep 21Mon Sep 21

Light rain 98°/76° 💧 0.139 in 💨 6 mph

Tuesday, Sep 22Tue Sep 22

Partly cloudy 91°/73° 💧 0.387 in 💨 4 mph

Wednesday, Sep 23Wed Sep 23

Light rain 84°/69° 💧 0.612 in 💨 6 mph

Thursday, Sep 24Thu Sep 24

Moderate rain 79°/65° 💧 0.712 in 💨 6 mph

Friday, Sep 25Fri Sep 25

Partly cloudy 76°/61° 💧 None 💨 5 mph

Saturday, Sep 26Sat Sep 26

Partly cloudy 76°/60° 💧 None 💨 5 mph

Sunday, Sep 27Sun Sep 27

Mostly sunny 78°/66° 💧 None 💨 5 mph

Monday, Sep 28Mon Sep 28

Partly cloudy 81°/77° 💧 0.012 in 💨 6 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Collinsville

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Collinsville

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 1:00 PM

PM2.5 Fine particles Fair 10,0µg/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 10,8µg/m³

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

O₃ Ozone Fair 87,5µg/m³

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

NO₂ Nitrogen dioxide Good 0,9µg/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 Collinsville

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 6,5High 🙂Fair

Tomorrow UV 5,0Moderate 🙂Fair

Tuesday UV 7,4High 🙂Fair

Wednesday UV 7,1High 🙂Fair

Thursday UV 7,0High 🙂Fair

Friday UV 7,0High —Unavailable

Saturday UV 9,0Very high —Unavailable

Hourly UV index today

1:00 PMUV 6,3 2:00 PMUV 6,1 3:00 PMUV 5,1 4:00 PMUV 2,9 5:00 PMUV 1,4 6:00 PMUV 0,4 7:00 PMUV 0,0

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

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Acceptable air quality

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

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure.

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 Collinsville

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · COLLINSVILLE, ILLINOIS

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 1:00 AM–2:00 AM.

93/100Best-hour score

BEST TIME TONIGHT 1:00 AM–2:00 AM Astronomical darkness: 8:41 PM–5:10 AM

☁ Cloud cover 10% Real hourly forecast for the best viewing hour.

☾ Moonlight 6% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 48° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min69%

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.

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Forecast data for Collinsville were last refreshed today at 12:17 PM. The current forecast period extends through 15/09/2026 at 10:00 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.