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Current weather in St. Augustine is broken clouds.

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

Now · 1:43 PM

St. Augustine Weather & Hourly Forecast

United States · Illinois · 61474

83°F

Mostly cloudy

Feels like: 83°F

💧 Humidity 58% 🌡 Pressure 30.00 inHg 💨 Wind 9 mph 👁 Visibility 22.4 mi ☁ Clouds 78% ☀️ UV index 7.2 · High 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for St. Augustine

Today

2:00 PM

Mostly cloudy

83° 💧 0.000 in 💨 9 mph H 58%30.00 inHg

5:00 PM

Overcast

83° 💧 None 💨 9 mph H 55%30.00 inHg

8:00 PM

Overcast night

77° 💧 None 💨 8 mph H 66%30.03 inHg

11:00 PM

Overcast night

72° 💧 None 💨 9 mph H 68%30.09 inHg

Tomorrow

2:00 AM

Clear night

67° 💧 None 💨 7 mph H 76%30.09 inHg

5:00 AM

Clear night

64° 💧 None 💨 6 mph H 88%30.12 inHg

8:00 AM

Sunny

66° 💧 None 💨 7 mph H 84%30.15 inHg

11:00 AM

Sunny

76° 💧 None 💨 10 mph H 53%30.15 inHg

2:00 PM

Partly cloudy

81° 💧 None 💨 7 mph H 44%30.12 inHg

5:00 PM

Partly cloudy

80° 💧 None 💨 8 mph H 46%30.06 inHg

8:00 PM

Mostly cloudy night

73° 💧 None 💨 5 mph H 67%30.06 inHg

11:00 PM

Mostly cloudy night

70° 💧 None 💨 8 mph H 69%30.12 inHg

Tuesday

2:00 AM

Mostly cloudy night

67° 💧 None 💨 8 mph H 71%30.09 inHg

5:00 AM

Mostly cloudy night

64° 💧 None 💨 5 mph H 81%30.09 inHg

8:00 AM

Sunny

67° 💧 None 💨 6 mph H 78%30.09 inHg

11:00 AM

Mostly sunny

80° 💧 None 💨 9 mph H 55%30.09 inHg

Today

2:00 PM

Mostly cloudy

83° 💧 None 💨 9 mph H 58%30.00 inHg

3:00 PM

Partly cloudy

83° 💧 0.000 in 💨 9 mph H 56%30.00 inHg

4:00 PM

Partly cloudy

83° 💧 None 💨 9 mph H 55%30.00 inHg

5:00 PM

Overcast

83° 💧 None 💨 9 mph H 55%30.00 inHg

6:00 PM

Overcast

81° 💧 None 💨 7 mph H 58%30.00 inHg

7:00 PM

Overcast

78° 💧 None 💨 6 mph H 64%30.03 inHg

8:00 PM

Overcast night

77° 💧 None 💨 8 mph H 66%30.03 inHg

9:00 PM

Overcast night

75° 💧 None 💨 8 mph H 69%30.06 inHg

10:00 PM

Overcast night

74° 💧 None 💨 9 mph H 70%30.06 inHg

11:00 PM

Overcast night

72° 💧 None 💨 9 mph H 68%30.09 inHg

Tomorrow

12:00 AM

Mostly cloudy night

70° 💧 None 💨 8 mph H 67%30.09 inHg

1:00 AM

Mostly clear night

68° 💧 None 💨 8 mph H 71%30.09 inHg

2:00 AM

Clear night

67° 💧 None 💨 7 mph H 76%30.09 inHg

3:00 AM

Clear night

66° 💧 None 💨 6 mph H 80%30.09 inHg

4:00 AM

Clear night

65° 💧 None 💨 5 mph H 84%30.12 inHg

5:00 AM

Clear night

64° 💧 None 💨 6 mph H 88%30.12 inHg

6:00 AM

Clear night

63° 💧 None 💨 6 mph H 90%30.15 inHg

7:00 AM

Sunny

63° 💧 None 💨 7 mph H 91%30.15 inHg

8:00 AM

Sunny

66° 💧 None 💨 7 mph H 84%30.15 inHg

9:00 AM

Mostly sunny

70° 💧 None 💨 6 mph H 74%30.15 inHg

10:00 AM

Sunny

74° 💧 None 💨 9 mph H 64%30.15 inHg

11:00 AM

Sunny

76° 💧 None 💨 10 mph H 53%30.15 inHg

12:00 PM

Mostly sunny

78° 💧 None 💨 9 mph H 48%30.12 inHg

1:00 PM

Mostly cloudy

80° 💧 None 💨 7 mph H 46%30.12 inHg

2:00 PM

Partly cloudy

81° 💧 None 💨 7 mph H 44%30.12 inHg

3:00 PM

Mostly sunny

81° 💧 None 💨 7 mph H 43%30.09 inHg

4:00 PM

Partly cloudy

81° 💧 None 💨 8 mph H 44%30.06 inHg

5:00 PM

Partly cloudy

80° 💧 None 💨 8 mph H 46%30.06 inHg

6:00 PM

Mostly cloudy

79° 💧 None 💨 8 mph H 51%30.06 inHg

7:00 PM

Mostly cloudy

76° 💧 None 💨 5 mph H 60%30.06 inHg

8:00 PM

Mostly cloudy night

73° 💧 None 💨 5 mph H 67%30.06 inHg

9:00 PM

Mostly cloudy night

72° 💧 None 💨 7 mph H 69%30.09 inHg

10:00 PM

Overcast night

71° 💧 None 💨 7 mph H 70%30.09 inHg

11:00 PM

Mostly cloudy night

70° 💧 None 💨 8 mph H 69%30.12 inHg

Tuesday

12:00 AM

Overcast night

70° 💧 None 💨 8 mph H 67%30.12 inHg

1:00 AM

Partly cloudy night

68° 💧 None 💨 7 mph H 69%30.09 inHg

2:00 AM

Mostly cloudy night

67° 💧 None 💨 8 mph H 71%30.09 inHg

3:00 AM

Overcast night

66° 💧 None 💨 7 mph H 74%30.06 inHg

4:00 AM

Mostly cloudy night

65° 💧 None 💨 5 mph H 77%30.09 inHg

5:00 AM

Mostly cloudy night

64° 💧 None 💨 5 mph H 81%30.09 inHg

6:00 AM

Mostly cloudy night

63° 💧 None 💨 5 mph H 83%30.09 inHg

7:00 AM

Mostly sunny

64° 💧 None 💨 6 mph H 83%30.09 inHg

8:00 AM

Sunny

67° 💧 None 💨 6 mph H 78%30.09 inHg

9:00 AM

Mostly sunny

71° 💧 None 💨 6 mph H 70%30.09 inHg

10:00 AM

Mostly cloudy

76° 💧 None 💨 7 mph H 62%30.09 inHg

11:00 AM

Mostly sunny

80° 💧 None 💨 9 mph H 55%30.09 inHg

12:00 PM

Mostly sunny

83° 💧 None 💨 9 mph H 48%30.09 inHg

1:00 PM

Mostly sunny

85° 💧 None 💨 9 mph H 44%30.06 inHg

2:00 PM

Mostly sunny

87° 💧 None 💨 9 mph H 42%30.03 inHg

3:00 PM

Sunny

88° 💧 None 💨 9 mph H 41%30.03 inHg

4:00 PM

Sunny

88° 💧 None 💨 10 mph H 41%30.00 inHg

5:00 PM

Mostly sunny

88° 💧 None 💨 10 mph H 42%30.00 inHg

6:00 PM

Sunny

86° 💧 None 💨 9 mph H 47%29.97 inHg

7:00 PM

Sunny

83° 💧 None 💨 8 mph H 51%29.97 inHg

8:00 PM

Clear night

81° 💧 None 💨 9 mph H 51%29.97 inHg

9:00 PM

Mostly clear night

79° 💧 None 💨 8 mph H 51%30.00 inHg

10:00 PM

Mostly cloudy night

78° 💧 None 💨 8 mph H 50%30.00 inHg

11:00 PM

Partly cloudy night

78° 💧 None 💨 9 mph H 48%30.00 inHg

Wednesday

12:00 AM

Mostly cloudy night

77° 💧 None 💨 9 mph H 47%29.97 inHg

1:00 AM

Mostly clear night

78° 💧 None 💨 10 mph H 45%29.97 inHg

2:00 AM

Mostly cloudy night

77° 💧 None 💨 10 mph H 46%29.97 inHg

3:00 AM

Mostly cloudy night

77° 💧 None 💨 11 mph H 48%29.94 inHg

4:00 AM

Overcast night

76° 💧 None 💨 11 mph H 50%29.94 inHg

5:00 AM

Overcast night

76° 💧 None 💨 10 mph H 50%29.94 inHg

6:00 AM

Overcast night

76° 💧 None 💨 5 mph H 50%29.97 inHg

7:00 AM

Mostly cloudy

74° 💧 None 💨 2 mph H 57%29.97 inHg

10:00 AM

Light rain

74° 💧 None 💨 10 mph H 89%30.03 inHg

1:00 PM

Partly cloudy

86° 💧 None 💨 9 mph H 62%30.00 inHg

4:00 PM

Overcast

88° 💧 None 💨 7 mph H 55%29.94 inHg

7:00 PM

Overcast

78° 💧 None 💨 6 mph H 85%29.94 inHg

10:00 PM

Overcast night

75° 💧 None 💨 1 mph H 94%29.97 inHg

Thursday

1:00 AM

Overcast night

74° 💧 None 💨 2 mph H 98%29.94 inHg

4:00 AM

Overcast night

71° 💧 None 💨 5 mph H 100%29.97 inHg

7:00 AM

Mostly cloudy

67° 💧 None 💨 6 mph H 89%29.97 inHg

10:00 AM

Mostly sunny

76° 💧 None 💨 7 mph H 55%30.00 inHg

1:00 PM

Sunny

82° 💧 None 💨 8 mph H 41%29.97 inHg

4:00 PM

Sunny

81° 💧 None 💨 10 mph H 38%29.91 inHg

7:00 PM

Sunny

75° 💧 None 💨 7 mph H 47%29.91 inHg

10:00 PM

Clear night

68° 💧 None 💨 5 mph H 60%29.97 inHg

Friday

1:00 AM

Clear night

63° 💧 None 💨 3 mph H 72%29.94 inHg

4:00 AM

Clear night

60° 💧 None 💨 2 mph H 81%29.94 inHg

7:00 AM

Sunny

57° 💧 None 💨 2 mph H 90%29.94 inHg

10:00 AM

Sunny

72° 💧 None 💨 4 mph H 58%29.94 inHg

1:00 PM

Sunny

80° 💧 None 💨 7 mph H 45%29.88 inHg

4:00 PM

Mostly sunny

82° 💧 None 💨 7 mph H 43%29.83 inHg

7:00 PM

Sunny

77° 💧 None 💨 7 mph H 57%29.80 inHg

10:00 PM

Partly cloudy night

71° 💧 None 💨 9 mph H 71%29.80 inHg

Saturday

1:00 AM

Mostly cloudy night

69° 💧 None 💨 7 mph H 73%29.80 inHg

7:00 AM

Thunderstorms

72° 💧 None 💨 7 mph H 96%29.77 inHg

1:00 PM

Mostly sunny

71° 💧 None 💨 6 mph H 98%29.77 inHg

7:00 PM

Partly cloudy

81° 💧 None 💨 5 mph H 75%29.83 inHg

Sunday

1:00 AM

Partly cloudy night

80° 💧 None 💨 2 mph H 83%29.83 inHg

7:00 AM

Sunny

74° 💧 None 💨 8 mph H 92%29.85 inHg

1:00 PM

Partly cloudy

77° 💧 None 💨 11 mph H 90%29.83 inHg

7:00 PM

Sunny

90° 💧 None 💨 14 mph H 61%29.83 inHg

Monday

1:00 AM

Mostly clear night

86° 💧 None 💨 10 mph H 71%29.80 inHg

7:00 AM

Sunny

81° 💧 None 💨 10 mph H 73%29.85 inHg

1:00 PM

Sunny

76° 💧 None 💨 7 mph H 78%29.91 inHg

7:00 PM

Sunny

90° 💧 None 💨 12 mph H 57%29.85 inHg

Tuesday

1:00 AM

Light rain

77° 💧 None 💨 11 mph H 93%29.88 inHg

7:00 AM

Overcast

66° 💧 None 💨 12 mph H 95%30.00 inHg

1:00 PM

Overcast

60° 💧 None 💨 10 mph H 87%30.12 inHg

7:00 PM

Overcast

67° 💧 None 💨 9 mph H 56%30.18 inHg

Wednesday

1:00 AM

Overcast night

64° 💧 None 💨 5 mph H 67%30.18 inHg

7:00 AM

Mostly cloudy

58° 💧 None 💨 5 mph H 82%30.24 inHg

1:00 PM

Mostly cloudy

55° 💧 None 💨 4 mph H 86%30.30 inHg

7:00 PM

Overcast

68° 💧 None 💨 4 mph H 55%30.27 inHg

Thursday

1:00 AM

Mostly clear night

64° 💧 None 💨 3 mph H 69%30.21 inHg

7:00 AM

Sunny

56° 💧 None 💨 4 mph H 85%30.21 inHg

1:00 PM

Sunny

54° 💧 None 💨 4 mph H 95%30.18 inHg

7:00 PM

Sunny

74° 💧 None 💨 6 mph H 56%30.09 inHg

Friday

1:00 AM

Clear night

69° 💧 None 💨 3 mph H 73%30.00 inHg

7:00 AM

Overcast

67° 💧 None 💨 5 mph H 76%29.97 inHg

1:00 PM

Light rain

64° 💧 None 💨 7 mph H 91%29.94 inHg

7:00 PM

Overcast

73° 💧 None 💨 11 mph H 73%29.85 inHg

Saturday

1:00 AM

Overcast night

69° 💧 None 💨 9 mph H 91%29.85 inHg

7:00 AM

Sunny

59° 💧 None 💨 9 mph H 71%29.97 inHg

1:00 PM

Sunny

51° 💧 None 💨 5 mph H 78%30.06 inHg

7:00 PM

Sunny

67° 💧 None 💨 6 mph H 42%30.09 inHg

Sunday

1:00 AM

Mostly clear night

61° 💧 None 💨 10 mph H 52%30.12 inHg

7:00 AM

Sunny

54° 💧 None 💨 6 mph H 72%30.21 inHg

1:00 PM

Sunny

48° 💧 None 💨 7 mph H 87%30.30 inHg

7:00 PM

Mostly sunny

60° 💧 None 💨 11 mph H 46%30.36 inHg

Monday

1:00 AM

Clear night

56° 💧 None 💨 5 mph H 56%30.33 inHg

In St. Augustine and, more broadly, across the state of Illinois: The weather remains mostly sunny with a few clouds lingering through the afternoon. Temperatures will be mild to warm, ranging from the upper 60s to low 80s. Winds will be coming from the east at around 10 mph, with gusts reaching up to 18 mph, providing a gentle breeze throughout the day. No precipitation is anticipated, allowing for continued dry conditions. Overall, it should be a pleasant day with comfortable temperatures and light to moderate winds.

15-Day Weather Outlook for St. Augustine

TomorrowTomorrow

Overcast 82°/63° 💧 None 💨 9 mph

Tuesday, Sep 8Tue Sep 8

Mostly sunny 89°/63° 💧 None 💨 10 mph

Wednesday, Sep 9Wed Sep 9

Light rain 88°/74° 💧 0.097 in 💨 11 mph

Thursday, Sep 10Thu Sep 10

Overcast 82°/67° 💧 0.014 in 💨 10 mph

Friday, Sep 11Fri Sep 11

Mostly sunny 82°/57° 💧 None 💨 7 mph

Saturday, Sep 12Sat Sep 12

Thunderstorms 77°/69° 💧 1.077 in 💨 9 mph

Sunday, Sep 13Sun Sep 13

Partly cloudy 81°/74° 💧 0.010 in 💨 11 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 90°/76° 💧 None 💨 14 mph

Tuesday, Sep 15Tue Sep 15

Light rain 90°/60° 💧 0.444 in 💨 12 mph

Wednesday, Sep 16Wed Sep 16

Overcast 67°/55° 💧 None 💨 9 mph

Thursday, Sep 17Thu Sep 17

Overcast 68°/54° 💧 None 💨 4 mph

Friday, Sep 18Fri Sep 18

Light rain 74°/64° 💧 0.031 in 💨 7 mph

Saturday, Sep 19Sat Sep 19

Overcast 73°/51° 💧 0.164 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 67°/48° 💧 None 💨 10 mph

Monday, Sep 21Mon Sep 21

Mostly sunny 60°/56° 💧 None 💨 11 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in St. Augustine

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for St. Augustine

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 2:00 PM

PM2.5 Fine particles Good 7,3µg/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 7,6µg/m³

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

O₃ Ozone Fair 88,9µg/m³

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

NO₂ Nitrogen dioxide Good 0,7µg/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 St. Augustine

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 7,2High 🙂Fair

Tomorrow UV 7,8High 😐Moderate

Tuesday UV 7,5High 😐Moderate

Wednesday UV 7,5High 🙂Fair

Thursday UV 7,0High 🙂Fair

Friday UV 7,0High —Unavailable

Saturday UV 5,0Moderate —Unavailable

Hourly UV index today

2:00 PMUV 7,0 3:00 PMUV 5,4 4:00 PMUV 3,5 5:00 PMUV 1,6 6:00 PMUV 0,6 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 St. Augustine

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ST. AUGUSTINE, ILLINOIS

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 2:00 AM–3:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 2:00 AM–3:00 AM Astronomical darkness: 9:00 PM–5:00 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 22% Waning Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 55° 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 min75%

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

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Forecast data for St. Augustine were last refreshed today at 1:43 PM. The current forecast period extends through 08/09/2026 at 11:00 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.