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Current weather in Glen St. Mary is scattered clouds.

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

Now · 10:16 AM

Glen St. Mary Weather & Hourly Forecast

United States · Florida · 32040

82°F

Partly cloudy

Feels like: 91°F

💧 Humidity 82% 🌡 Pressure 30.06 inHg 💨 Wind 4 mph 👁 Visibility 6.7 mi ☁ Clouds 44% ☀️ UV index 2.6 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Glen St. Mary

Today

11:00 AM

Partly cloudy

85° 💧 0.005 in 💨 4 mph H 75%30.06 inHg

2:00 PM

Light rain

90° 💧 0.055 in 💨 5 mph H 59%30.00 inHg

5:00 PM

Light rain

85° 💧 0.057 in 💨 3 mph H 81%29.94 inHg

8:00 PM

Partly cloudy night

79° 💧 0.001 in 💨 2 mph H 99%30.00 inHg

11:00 PM

Overcast night

77° 💧 None 💨 3 mph H 99%30.03 inHg

Tomorrow

2:00 AM

Mostly cloudy night

76° 💧 None 💨 4 mph H 99%30.03 inHg

5:00 AM

Clear night

75° 💧 None 💨 3 mph H 100%30.00 inHg

8:00 AM

Sunny

76° 💧 None 💨 4 mph H 99%30.06 inHg

11:00 AM

Strong thunderstorm

87° 💧 0.010 in 💨 2 mph H 70%30.06 inHg

2:00 PM

Mostly sunny

93° 💧 0.002 in 💨 3 mph H 53%30.00 inHg

5:00 PM

Light thunderstorms

82° 💧 0.096 in 💨 9 mph H 92%29.97 inHg

8:00 PM

Clear night

80° 💧 None 💨 5 mph H 96%30.00 inHg

11:00 PM

Clear night

77° 💧 None 💨 3 mph H 98%30.06 inHg

Tuesday

2:00 AM

Fog at night

75° 💧 0.000 in 💨 0 mph H 99%30.03 inHg

5:00 AM

Fog at night

73° 💧 None 💨 2 mph H 100%30.06 inHg

8:00 AM

Fog

75° 💧 None 💨 4 mph H 100%30.12 inHg

Today

11:00 AM

Partly cloudy

85° 💧 0.001 in 💨 4 mph H 75%30.06 inHg

12:00 PM

Partly cloudy

87° 💧 0.002 in 💨 4 mph H 69%30.06 inHg

1:00 PM

Partly cloudy

89° 💧 0.002 in 💨 4 mph H 63%30.03 inHg

2:00 PM

Light rain

90° 💧 0.005 in 💨 5 mph H 59%30.00 inHg

3:00 PM

Overcast

91° 💧 0.002 in 💨 6 mph H 57%30.00 inHg

4:00 PM

Light thunderstorms

85° 💧 0.048 in 💨 6 mph H 81%29.97 inHg

5:00 PM

Light rain

85° 💧 0.019 in 💨 3 mph H 81%29.94 inHg

6:00 PM

Light thunderstorms

82° 💧 0.026 in 💨 4 mph H 89%29.97 inHg

7:00 PM

Light rain

80° 💧 0.011 in 💨 2 mph H 96%29.97 inHg

8:00 PM

Partly cloudy night

79° 💧 0.001 in 💨 2 mph H 99%30.00 inHg

9:00 PM

Mostly clear night

78° 💧 None 💨 3 mph H 99%30.00 inHg

10:00 PM

Mostly cloudy night

78° 💧 None 💨 4 mph H 99%30.03 inHg

11:00 PM

Overcast night

77° 💧 None 💨 3 mph H 99%30.03 inHg

Tomorrow

12:00 AM

Overcast night

77° 💧 None 💨 4 mph H 99%30.03 inHg

1:00 AM

Overcast night

77° 💧 None 💨 4 mph H 99%30.03 inHg

2:00 AM

Mostly cloudy night

76° 💧 None 💨 4 mph H 99%30.03 inHg

3:00 AM

Mostly clear night

76° 💧 None 💨 4 mph H 99%30.00 inHg

4:00 AM

Clear night

75° 💧 None 💨 4 mph H 100%30.00 inHg

5:00 AM

Clear night

75° 💧 None 💨 3 mph H 100%30.00 inHg

6:00 AM

Clear night

75° 💧 None 💨 3 mph H 100%30.03 inHg

7:00 AM

Clear night

75° 💧 None 💨 3 mph H 100%30.03 inHg

8:00 AM

Sunny

76° 💧 None 💨 4 mph H 99%30.06 inHg

9:00 AM

Sunny

79° 💧 None 💨 2 mph H 95%30.06 inHg

10:00 AM

Sunny

83° 💧 None 💨 2 mph H 85%30.06 inHg

11:00 AM

Strong thunderstorm

87° 💧 0.002 in 💨 2 mph H 70%30.06 inHg

12:00 PM

Light rain

90° 💧 0.004 in 💨 3 mph H 62%30.06 inHg

1:00 PM

Mostly sunny

92° 💧 0.003 in 💨 3 mph H 57%30.03 inHg

2:00 PM

Mostly sunny

93° 💧 0.002 in 💨 3 mph H 53%30.00 inHg

3:00 PM

Mostly sunny

93° 💧 0.000 in 💨 3 mph H 52%29.97 inHg

4:00 PM

Overcast

94° 💧 None 💨 3 mph H 51%29.97 inHg

5:00 PM

Light thunderstorms

82° 💧 0.070 in 💨 9 mph H 92%29.97 inHg

6:00 PM

Light rain

82° 💧 0.024 in 💨 3 mph H 94%29.97 inHg

7:00 PM

Mostly sunny

82° 💧 0.002 in 💨 4 mph H 92%30.00 inHg

8:00 PM

Clear night

80° 💧 None 💨 5 mph H 96%30.00 inHg

9:00 PM

Clear night

79° 💧 None 💨 4 mph H 97%30.03 inHg

10:00 PM

Clear night

78° 💧 None 💨 3 mph H 97%30.06 inHg

11:00 PM

Clear night

77° 💧 None 💨 3 mph H 98%30.06 inHg

Tuesday

12:00 AM

Clear night

76° 💧 None 💨 2 mph H 99%30.06 inHg

1:00 AM

Clear night

76° 💧 None 💨 1 mph H 99%30.06 inHg

2:00 AM

Fog at night

75° 💧 None 💨 0 mph H 99%30.03 inHg

3:00 AM

Fog at night

74° 💧 None 💨 0 mph H 99%30.03 inHg

4:00 AM

Fog at night

73° 💧 0.000 in 💨 2 mph H 100%30.03 inHg

5:00 AM

Fog at night

73° 💧 None 💨 2 mph H 100%30.06 inHg

6:00 AM

Fog at night

73° 💧 None 💨 3 mph H 100%30.06 inHg

7:00 AM

Fog at night

74° 💧 None 💨 3 mph H 100%30.09 inHg

8:00 AM

Fog

75° 💧 None 💨 4 mph H 100%30.12 inHg

9:00 AM

Fog

77° 💧 None 💨 5 mph H 96%30.12 inHg

10:00 AM

Mostly sunny

81° 💧 None 💨 4 mph H 86%30.15 inHg

11:00 AM

Mostly sunny

85° 💧 0.002 in 💨 7 mph H 71%30.15 inHg

12:00 PM

Mostly sunny

88° 💧 0.002 in 💨 9 mph H 59%30.15 inHg

1:00 PM

Sunny

90° 💧 0.001 in 💨 9 mph H 54%30.12 inHg

2:00 PM

Mostly sunny

92° 💧 0.000 in 💨 10 mph H 50%30.12 inHg

3:00 PM

Mostly sunny

91° 💧 0.003 in 💨 10 mph H 50%30.09 inHg

4:00 PM

Light rain

88° 💧 0.037 in 💨 12 mph H 60%30.09 inHg

5:00 PM

Light rain

86° 💧 0.016 in 💨 12 mph H 65%30.09 inHg

6:00 PM

Mostly sunny

84° 💧 0.003 in 💨 11 mph H 70%30.09 inHg

7:00 PM

Sunny

82° 💧 0.003 in 💨 10 mph H 77%30.12 inHg

8:00 PM

Mostly clear night

79° 💧 0.000 in 💨 8 mph H 84%30.12 inHg

Wednesday

5:00 AM

Clear night

75° 💧 None 💨 8 mph H 85%30.15 inHg

8:00 AM

Sunny

73° 💧 None 💨 8 mph H 83%30.21 inHg

11:00 AM

Mostly sunny

83° 💧 None 💨 11 mph H 58%30.21 inHg

2:00 PM

Partly cloudy

88° 💧 None 💨 13 mph H 45%30.18 inHg

5:00 PM

Partly cloudy

84° 💧 None 💨 12 mph H 55%30.12 inHg

8:00 PM

Mostly clear night

78° 💧 None 💨 9 mph H 74%30.15 inHg

11:00 PM

Light rain

74° 💧 None 💨 7 mph H 87%30.21 inHg

Thursday

2:00 AM

Mostly clear night

72° 💧 None 💨 7 mph H 92%30.15 inHg

5:00 AM

Partly cloudy night

72° 💧 None 💨 7 mph H 92%30.12 inHg

8:00 AM

Mostly sunny

72° 💧 None 💨 8 mph H 92%30.15 inHg

11:00 AM

Light rain

82° 💧 None 💨 13 mph H 62%30.18 inHg

2:00 PM

Moderate rain

85° 💧 None 💨 12 mph H 54%30.12 inHg

5:00 PM

Partly cloudy

82° 💧 None 💨 13 mph H 62%30.06 inHg

8:00 PM

Light rain

74° 💧 None 💨 7 mph H 92%30.09 inHg

11:00 PM

Mostly clear night

72° 💧 None 💨 7 mph H 97%30.12 inHg

Friday

2:00 AM

Mostly cloudy night

72° 💧 None 💨 6 mph H 99%30.09 inHg

5:00 AM

Partly cloudy night

72° 💧 None 💨 5 mph H 100%30.06 inHg

8:00 AM

Overcast

73° 💧 None 💨 6 mph H 98%30.09 inHg

11:00 AM

Light rain

82° 💧 None 💨 6 mph H 75%30.09 inHg

2:00 PM

Light rain

86° 💧 None 💨 8 mph H 68%30.03 inHg

5:00 PM

Moderate rain

84° 💧 None 💨 6 mph H 69%29.97 inHg

8:00 PM

Partly cloudy night

77° 💧 None 💨 2 mph H 97%30.00 inHg

11:00 PM

Partly cloudy night

75° 💧 None 💨 4 mph H 98%30.03 inHg

Saturday

2:00 AM

Clear night

73° 💧 None 💨 3 mph H 99%30.00 inHg

8:00 AM

Overcast

74° 💧 None 💨 3 mph H 99%30.03 inHg

2:00 PM

Overcast

73° 💧 None 💨 3 mph H 100%30.03 inHg

8:00 PM

Light rain

89° 💧 None 💨 5 mph H 56%30.00 inHg

Sunday

2:00 AM

Overcast night

76° 💧 None 💨 3 mph H 97%29.97 inHg

8:00 AM

Mostly sunny

74° 💧 None 💨 1 mph H 99%30.00 inHg

2:00 PM

Overcast

73° 💧 None 💨 3 mph H 100%30.00 inHg

8:00 PM

Overcast night

91° 💧 None 💨 2 mph H 55%30.00 inHg

Monday

2:00 AM

Mostly cloudy night

76° 💧 None 💨 2 mph H 99%30.00 inHg

8:00 AM

Overcast

73° 💧 None 💨 1 mph H 100%30.00 inHg

2:00 PM

Overcast

73° 💧 None 💨 4 mph H 99%30.03 inHg

8:00 PM

Overcast night

87° 💧 None 💨 3 mph H 62%30.00 inHg

Tuesday

2:00 AM

Light rain

77° 💧 None 💨 5 mph H 95%30.00 inHg

8:00 AM

Overcast

74° 💧 None 💨 4 mph H 99%30.03 inHg

2:00 PM

Overcast

74° 💧 None 💨 3 mph H 99%30.06 inHg

8:00 PM

Moderate rain

86° 💧 None 💨 6 mph H 65%30.03 inHg

Wednesday

2:00 AM

Overcast night

78° 💧 None 💨 2 mph H 92%30.03 inHg

8:00 AM

Mostly cloudy

74° 💧 None 💨 2 mph H 98%30.03 inHg

2:00 PM

Overcast

74° 💧 None 💨 3 mph H 100%30.03 inHg

8:00 PM

Overcast night

88° 💧 None 💨 1 mph H 62%30.00 inHg

Thursday

2:00 AM

Partly cloudy night

77° 💧 None 💨 6 mph H 96%29.97 inHg

8:00 AM

Mostly cloudy

73° 💧 None 💨 2 mph H 100%29.97 inHg

2:00 PM

Overcast

73° 💧 None 💨 1 mph H 100%29.97 inHg

8:00 PM

Mostly clear night

89° 💧 None 💨 2 mph H 61%29.94 inHg

Friday

2:00 AM

Mostly cloudy night

75° 💧 None 💨 4 mph H 99%29.94 inHg

8:00 AM

Sunny

74° 💧 None 💨 3 mph H 100%29.97 inHg

2:00 PM

Partly cloudy

73° 💧 None 💨 2 mph H 99%30.00 inHg

8:00 PM

Overcast night

91° 💧 None 💨 1 mph H 58%30.00 inHg

Saturday

2:00 AM

Mostly cloudy night

76° 💧 None 💨 2 mph H 99%30.00 inHg

8:00 AM

Overcast

73° 💧 None 💨 2 mph H 100%30.00 inHg

2:00 PM

Overcast

73° 💧 None 💨 3 mph H 100%30.03 inHg

8:00 PM

Light rain

89° 💧 None 💨 2 mph H 60%30.00 inHg

Sunday

2:00 AM

Mostly cloudy night

76° 💧 None 💨 5 mph H 93%29.97 inHg

8:00 AM

Sunny

73° 💧 None 💨 3 mph H 98%29.97 inHg

2:00 PM

Mostly cloudy

72° 💧 None 💨 3 mph H 98%29.97 inHg

8:00 PM

Mostly clear night

90° 💧 None 💨 2 mph H 56%29.91 inHg

Monday

2:00 AM

Mostly clear night

77° 💧 None 💨 4 mph H 91%29.91 inHg

In Glen St. Mary and, more broadly, across the state of Florida: Today will bring a mix of sun and clouds, with temperatures climbing into the high 70s and reaching up to around 86 degrees Fahrenheit. The weather remains quite warm for the time of year. There is a possibility of light rain later in the day, with potential accumulation around 0.08 inches, and the highest chance of rain occurring in the afternoon. Winds will be gentle, coming from the northwest at no more than 5 mph, with gusts reaching up to 10 mph. Overall, expect warm and partly cloudy conditions with some scattered showers possible as the day progresses.

15-Day Weather Outlook for Glen St. Mary

TomorrowTomorrow

Strong thunderstorm 94°/75° 💧 None 💨 9 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 92°/73° 💧 None 💨 12 mph

Wednesday, Sep 16Wed Sep 16

Partly cloudy 88°/73° 💧 0.291 in 💨 13 mph

Thursday, Sep 17Thu Sep 17

Moderate rain 85°/72° 💧 0.056 in 💨 13 mph

Friday, Sep 18Fri Sep 18

Moderate rain 86°/72° 💧 0.168 in 💨 8 mph

Saturday, Sep 19Sat Sep 19

Partly cloudy 77°/73° 💧 0.168 in 💨 4 mph

Sunday, Sep 20Sun Sep 20

Light rain 89°/73° 💧 0.139 in 💨 5 mph

Monday, Sep 21Mon Sep 21

Overcast 91°/73° 💧 0.269 in 💨 4 mph

Tuesday, Sep 22Tue Sep 22

Light rain 87°/74° 💧 0.275 in 💨 5 mph

Wednesday, Sep 23Wed Sep 23

Moderate rain 86°/74° 💧 0.186 in 💨 6 mph

Thursday, Sep 24Thu Sep 24

Partly cloudy 88°/73° 💧 0.143 in 💨 6 mph

Friday, Sep 25Fri Sep 25

Mostly cloudy 89°/73° 💧 0.180 in 💨 4 mph

Saturday, Sep 26Sat Sep 26

Overcast 91°/73° 💧 0.226 in 💨 3 mph

Sunday, Sep 27Sun Sep 27

Light rain 89°/72° 💧 0.019 in 💨 5 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 90°/77° 💧 0.041 in 💨 4 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Glen St. Mary

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Glen St. Mary

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 11:00 AM

PM2.5 Fine particles Good 2,5µg/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 2,9µg/m³

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

O₃ Ozone Good 36,2µg/m³

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

NO₂ Nitrogen dioxide Good 1,3µg/m³

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

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Glen St. Mary

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 9,1Very high 😊Good

Tomorrow UV 9,1Very high 😊Good

Tuesday UV 8,8Very high 🙂Fair

Wednesday UV 8,5Very high 😐Moderate

Thursday UV 7,0High 🙂Fair

Friday UV 8,0Very high —Unavailable

Saturday UV 6,0High —Unavailable

Hourly UV index today

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

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

Very high UV risk

Use SPF 50+ sunscreen, a hat and sunglasses. Seek shade and limit exposure around midday.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure. High humidity can make it feel hotter.

Best in the morning or late in the day

For walking, running or cycling, prefer the early morning or late afternoon.

WIND OUTLOOK

Hourly Wind Forecast for Glen St. Mary

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · GLEN ST. MARY, FLORIDA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 6:00 AM–7:00 AM.

92/100Best-hour score

BEST TIME TONIGHT 6:00 AM–7:00 AM Astronomical darkness: 8:57 PM–5:52 AM

☁ Cloud cover 2% Real hourly forecast for the best viewing hour.

☾ Moonlight 7% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 75° high at the best hour.

✦ Estimated visible meteors 2–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min78%

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 Glen St. Mary were last refreshed today at 10:16 AM. The current forecast period extends through 15/09/2026 at 8:00 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.