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Current weather in St. Charles is overcast clouds.

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

Now · 10:01 PM

St. Charles Weather & Hourly Forecast

United States · South Dakota · 57571

58°F

Overcast night

Feels like: 56°F

💧 Humidity 99% 🌡 Pressure 30.12 inHg 💨 Wind 8 mph 👁 Visibility 6.8 mi ☁ Clouds 100% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for St. Charles

Today

11:00 PM

Light rain

58° 💧 0.019 in 💨 7 mph H 98%30.12 inHg

Tomorrow

2:00 AM

Light rain

58° 💧 0.022 in 💨 6 mph H 99%30.09 inHg

5:00 AM

Light rain

57° 💧 0.066 in 💨 6 mph H 99%30.09 inHg

8:00 AM

Light rain

56° 💧 0.095 in 💨 8 mph H 99%30.12 inHg

11:00 AM

Light rain

58° 💧 0.030 in 💨 8 mph H 93%30.15 inHg

2:00 PM

Light rain

60° 💧 0.012 in 💨 10 mph H 85%30.15 inHg

5:00 PM

Overcast

60° 💧 0.006 in 💨 10 mph H 81%30.15 inHg

8:00 PM

Overcast night

58° 💧 0.000 in 💨 5 mph H 82%30.18 inHg

11:00 PM

Overcast night

55° 💧 0.000 in 💨 6 mph H 89%30.24 inHg

Tuesday

2:00 AM

Overcast night

54° 💧 None 💨 5 mph H 91%30.27 inHg

5:00 AM

Overcast night

53° 💧 None 💨 3 mph H 93%30.24 inHg

8:00 AM

Overcast

54° 💧 None 💨 6 mph H 92%30.27 inHg

11:00 AM

Overcast

59° 💧 0.005 in 💨 9 mph H 75%30.27 inHg

2:00 PM

Overcast

61° 💧 0.004 in 💨 12 mph H 71%30.21 inHg

5:00 PM

Overcast

63° 💧 None 💨 13 mph H 67%30.15 inHg

8:00 PM

Overcast night

61° 💧 None 💨 10 mph H 73%30.18 inHg

Today

11:00 PM

Light rain

58° 💧 0.005 in 💨 7 mph H 98%30.12 inHg

Tomorrow

12:00 AM

Light rain

58° 💧 0.008 in 💨 7 mph H 98%30.12 inHg

1:00 AM

Light rain

58° 💧 0.005 in 💨 6 mph H 98%30.12 inHg

2:00 AM

Light rain

58° 💧 0.005 in 💨 6 mph H 99%30.09 inHg

3:00 AM

Light rain

58° 💧 0.004 in 💨 6 mph H 99%30.09 inHg

4:00 AM

Light rain

57° 💧 0.013 in 💨 6 mph H 99%30.09 inHg

5:00 AM

Light rain

57° 💧 0.008 in 💨 6 mph H 99%30.09 inHg

6:00 AM

Light rain

57° 💧 0.025 in 💨 8 mph H 99%30.12 inHg

7:00 AM

Light rain

56° 💧 0.033 in 💨 9 mph H 99%30.12 inHg

8:00 AM

Light rain

56° 💧 0.044 in 💨 8 mph H 99%30.12 inHg

9:00 AM

Light rain

57° 💧 0.033 in 💨 8 mph H 98%30.15 inHg

10:00 AM

Light rain

57° 💧 0.018 in 💨 8 mph H 97%30.15 inHg

11:00 AM

Light rain

58° 💧 0.012 in 💨 8 mph H 93%30.15 inHg

12:00 PM

Light rain

59° 💧 0.008 in 💨 9 mph H 91%30.15 inHg

1:00 PM

Light rain

61° 💧 0.010 in 💨 10 mph H 85%30.15 inHg

2:00 PM

Light rain

60° 💧 0.007 in 💨 10 mph H 85%30.15 inHg

3:00 PM

Overcast

61° 💧 0.002 in 💨 10 mph H 80%30.15 inHg

4:00 PM

Overcast

60° 💧 0.003 in 💨 10 mph H 81%30.15 inHg

5:00 PM

Overcast

60° 💧 0.002 in 💨 10 mph H 81%30.15 inHg

6:00 PM

Overcast

59° 💧 0.003 in 💨 11 mph H 80%30.15 inHg

7:00 PM

Overcast

59° 💧 0.001 in 💨 9 mph H 81%30.18 inHg

8:00 PM

Overcast night

58° 💧 0.000 in 💨 5 mph H 82%30.18 inHg

9:00 PM

Overcast night

57° 💧 None 💨 5 mph H 86%30.18 inHg

10:00 PM

Overcast night

56° 💧 0.000 in 💨 5 mph H 87%30.21 inHg

11:00 PM

Overcast night

55° 💧 0.000 in 💨 6 mph H 89%30.24 inHg

Tuesday

12:00 AM

Overcast night

55° 💧 None 💨 7 mph H 88%30.24 inHg

1:00 AM

Overcast night

54° 💧 None 💨 6 mph H 90%30.27 inHg

2:00 AM

Overcast night

54° 💧 None 💨 5 mph H 91%30.27 inHg

3:00 AM

Overcast night

53° 💧 None 💨 5 mph H 93%30.27 inHg

4:00 AM

Overcast night

53° 💧 None 💨 4 mph H 94%30.24 inHg

5:00 AM

Overcast night

53° 💧 None 💨 3 mph H 93%30.24 inHg

6:00 AM

Overcast night

53° 💧 None 💨 3 mph H 93%30.27 inHg

7:00 AM

Mostly cloudy night

53° 💧 None 💨 4 mph H 94%30.27 inHg

8:00 AM

Overcast

54° 💧 None 💨 6 mph H 92%30.27 inHg

9:00 AM

Mostly cloudy

55° 💧 None 💨 7 mph H 88%30.27 inHg

10:00 AM

Mostly cloudy

58° 💧 None 💨 8 mph H 79%30.27 inHg

11:00 AM

Overcast

59° 💧 0.002 in 💨 9 mph H 75%30.27 inHg

12:00 PM

Overcast

61° 💧 0.003 in 💨 9 mph H 70%30.24 inHg

1:00 PM

Overcast

61° 💧 0.001 in 💨 10 mph H 68%30.24 inHg

2:00 PM

Overcast

61° 💧 0.002 in 💨 12 mph H 71%30.21 inHg

3:00 PM

Overcast

61° 💧 0.002 in 💨 11 mph H 71%30.21 inHg

4:00 PM

Overcast

62° 💧 0.000 in 💨 12 mph H 69%30.18 inHg

5:00 PM

Overcast

63° 💧 None 💨 13 mph H 67%30.15 inHg

6:00 PM

Overcast

63° 💧 None 💨 12 mph H 68%30.15 inHg

7:00 PM

Overcast

62° 💧 None 💨 10 mph H 71%30.15 inHg

8:00 PM

Overcast night

61° 💧 None 💨 10 mph H 73%30.18 inHg

9:00 PM

Overcast night

61° 💧 None 💨 11 mph H 76%30.18 inHg

10:00 PM

Overcast night

61° 💧 None 💨 12 mph H 78%30.21 inHg

11:00 PM

Mostly cloudy night

60° 💧 None 💨 13 mph H 79%30.21 inHg

Wednesday

12:00 AM

Overcast night

59° 💧 None 💨 14 mph H 83%30.18 inHg

1:00 AM

Mostly clear night

59° 💧 0.001 in 💨 13 mph H 85%30.18 inHg

2:00 AM

Overcast night

58° 💧 None 💨 14 mph H 86%30.18 inHg

3:00 AM

Overcast night

58° 💧 0.001 in 💨 14 mph H 87%30.18 inHg

4:00 AM

Overcast night

58° 💧 0.003 in 💨 15 mph H 89%30.18 inHg

5:00 AM

Overcast night

57° 💧 0.002 in 💨 15 mph H 92%30.18 inHg

6:00 AM

Light rain

56° 💧 0.044 in 💨 14 mph H 96%30.18 inHg

7:00 AM

Light rain

56° 💧 0.012 in 💨 14 mph H 96%30.21 inHg

4:00 PM

Overcast

67° 💧 None 💨 18 mph H 73%30.12 inHg

7:00 PM

Overcast

66° 💧 None 💨 16 mph H 76%30.09 inHg

10:00 PM

Overcast night

65° 💧 None 💨 14 mph H 78%30.12 inHg

Thursday

1:00 AM

Overcast night

64° 💧 None 💨 12 mph H 83%30.09 inHg

4:00 AM

Overcast night

64° 💧 None 💨 12 mph H 87%30.09 inHg

7:00 AM

Overcast night

63° 💧 None 💨 8 mph H 93%30.09 inHg

10:00 AM

Overcast

67° 💧 None 💨 7 mph H 87%30.12 inHg

1:00 PM

Overcast

71° 💧 None 💨 4 mph H 67%30.12 inHg

4:00 PM

Overcast

75° 💧 None 💨 4 mph H 62%30.06 inHg

7:00 PM

Overcast

70° 💧 None 💨 5 mph H 74%30.09 inHg

10:00 PM

Overcast night

64° 💧 None 💨 5 mph H 88%30.12 inHg

Friday

1:00 AM

Overcast night

61° 💧 None 💨 1 mph H 96%30.12 inHg

4:00 AM

Overcast night

62° 💧 None 💨 6 mph H 100%30.12 inHg

7:00 AM

Overcast night

61° 💧 None 💨 7 mph H 98%30.12 inHg

10:00 AM

Overcast

64° 💧 None 💨 9 mph H 90%30.12 inHg

1:00 PM

Overcast

66° 💧 None 💨 12 mph H 81%30.12 inHg

4:00 PM

Light rain

64° 💧 None 💨 12 mph H 85%30.06 inHg

7:00 PM

Overcast

63° 💧 None 💨 12 mph H 90%30.03 inHg

10:00 PM

Overcast night

61° 💧 None 💨 11 mph H 95%30.03 inHg

Saturday

1:00 AM

Moderate rain

61° 💧 None 💨 7 mph H 97%29.97 inHg

4:00 AM

Overcast night

60° 💧 None 💨 7 mph H 99%29.91 inHg

7:00 AM

Mostly cloudy night

61° 💧 None 💨 4 mph H 99%29.88 inHg

10:00 AM

Mostly cloudy

67° 💧 None 💨 9 mph H 88%29.88 inHg

1:00 PM

Overcast

75° 💧 None 💨 10 mph H 69%29.85 inHg

7:00 PM

Overcast

75° 💧 None 💨 13 mph H 71%29.85 inHg

Sunday

1:00 AM

Clear night

73° 💧 None 💨 12 mph H 76%29.83 inHg

7:00 AM

Clear night

65° 💧 None 💨 8 mph H 96%29.85 inHg

1:00 PM

Sunny

63° 💧 None 💨 9 mph H 98%29.85 inHg

7:00 PM

Overcast

77° 💧 None 💨 12 mph H 73%29.83 inHg

Monday

1:00 AM

Mostly clear night

77° 💧 None 💨 11 mph H 75%29.77 inHg

7:00 AM

Mostly clear night

63° 💧 None 💨 5 mph H 95%29.83 inHg

1:00 PM

Light rain

63° 💧 None 💨 10 mph H 95%29.80 inHg

7:00 PM

Overcast

76° 💧 None 💨 14 mph H 66%29.71 inHg

Tuesday

1:00 AM

Overcast night

65° 💧 None 💨 9 mph H 94%29.65 inHg

7:00 AM

Light rain

62° 💧 None 💨 13 mph H 93%29.62 inHg

1:00 PM

Mostly sunny

57° 💧 None 💨 21 mph H 57%29.77 inHg

7:00 PM

Partly cloudy

62° 💧 None 💨 26 mph H 51%29.83 inHg

Wednesday

1:00 AM

Clear night

61° 💧 None 💨 20 mph H 50%29.85 inHg

7:00 AM

Clear night

55° 💧 None 💨 17 mph H 61%29.91 inHg

1:00 PM

Sunny

51° 💧 None 💨 17 mph H 76%29.97 inHg

7:00 PM

Sunny

63° 💧 None 💨 18 mph H 54%30.00 inHg

Thursday

1:00 AM

Clear night

61° 💧 None 💨 11 mph H 55%29.94 inHg

7:00 AM

Clear night

52° 💧 None 💨 6 mph H 78%29.97 inHg

1:00 PM

Sunny

48° 💧 None 💨 4 mph H 88%29.94 inHg

7:00 PM

Sunny

65° 💧 None 💨 2 mph H 68%29.91 inHg

Friday

1:00 AM

Clear night

64° 💧 None 💨 4 mph H 71%29.88 inHg

7:00 AM

Clear night

56° 💧 None 💨 0 mph H 84%29.97 inHg

1:00 PM

Sunny

49° 💧 None 💨 3 mph H 98%30.03 inHg

7:00 PM

Sunny

69° 💧 None 💨 3 mph H 61%30.03 inHg

Saturday

1:00 AM

Clear night

64° 💧 None 💨 5 mph H 70%29.94 inHg

7:00 AM

Clear night

56° 💧 None 💨 8 mph H 87%29.94 inHg

1:00 PM

Mostly sunny

53° 💧 None 💨 11 mph H 91%29.85 inHg

7:00 PM

Mostly sunny

72° 💧 None 💨 18 mph H 57%29.71 inHg

Sunday

1:00 AM

Overcast night

70° 💧 None 💨 14 mph H 65%29.62 inHg

7:00 AM

Light rain

59° 💧 None 💨 14 mph H 91%29.80 inHg

1:00 PM

Sunny

53° 💧 None 💨 15 mph H 57%29.91 inHg

7:00 PM

Sunny

61° 💧 None 💨 15 mph H 49%29.94 inHg

Monday

1:00 AM

Clear night

55° 💧 None 💨 4 mph H 52%29.85 inHg

7:00 AM

Clear night

47° 💧 None 💨 2 mph H 67%29.85 inHg

In St. Charles and, more broadly, across the state of South Dakota: Tonight, the sky will be mostly cloudy with temperatures settling between 57 and 58 degrees Fahrenheit. There is a high likelihood of rain, with possibly around 0.22 inches falling during the evening and early night hours. Winds from the east will be moderate, generally around 11 mph, with gusts reaching up to 18 mph. Expect the conditions to feel quite cool, and be prepared for periods of rain as the night progresses. The rain could be steady at times, so carrying an umbrella or raincoat might be helpful if you're heading outdoors. Temperatures will remain steady through the evening, gradually cooling as the night continues.

15-Day Weather Outlook for St. Charles

TomorrowTomorrow

Overcast 61°/55° 💧 None 💨 11 mph

Tuesday, Sep 22Tue Sep 22

Overcast 63°/53° 💧 None 💨 13 mph

Wednesday, Sep 23Wed Sep 23

Light rain 67°/56° 💧 0.778 in 💨 18 mph

Thursday, Sep 24Thu Sep 24

Overcast 75°/63° 💧 None 💨 12 mph

Friday, Sep 25Fri Sep 25

Light rain 66°/61° 💧 0.056 in 💨 12 mph

Saturday, Sep 26Sat Sep 26

Moderate rain 75°/60° 💧 0.465 in 💨 13 mph

Sunday, Sep 27Sun Sep 27

Overcast 77°/63° 💧 None 💨 12 mph

Monday, Sep 28Mon Sep 28

Light rain 77°/63° 💧 0.048 in 💨 14 mph

Tuesday, Sep 29Tue Sep 29

Light rain 65°/57° 💧 0.319 in 💨 26 mph

Wednesday, Sep 30Wed Sep 30

Sunny 63°/51° 💧 None 💨 20 mph

Thursday, Oct 1Thu Oct 1

Sunny 65°/48° 💧 None 💨 11 mph

Friday, Oct 2Fri Oct 2

Sunny 69°/49° 💧 None 💨 4 mph

Saturday, Oct 3Sat Oct 3

Mostly sunny 72°/53° 💧 None 💨 18 mph

Sunday, Oct 4Sun Oct 4

Light rain 70°/53° 💧 0.094 in 💨 15 mph

Monday, Oct 5Mon Oct 5

Sunny 55°/47° 💧 None 💨 4 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in St. Charles

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for St. Charles

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 11:00 PM

PM2.5 Fine particles Good 0,7µg/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 0,7µg/m³

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

O₃ Ozone Good 54,4µg/m³

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

NO₂ Nitrogen dioxide Good 1,1µg/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 St. Charles

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 0,5Low 😊Good

Tomorrow UV 0,8Low 🙂Fair

Tuesday UV 3,6Moderate 🙂Fair

Wednesday UV 5,3Moderate 🙂Fair

Thursday UV 1,2Low 🙂Fair

Friday UV 3,0Moderate —Unavailable

Saturday UV 6,0High —Unavailable

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

Low UV risk

UV radiation will be low, although basic protection is still advisable during prolonged exposure.

Good air quality

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

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 St. Charles

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ST. CHARLES, SOUTH DAKOTA

Tonight's Stargazing & Shooting Stars

Local night-sky conditions and meteor activity for Jasper.

15/100Best-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 71% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 59° 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

ACTIVE NOW

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 St. Charles were last refreshed today at 10:01 PM. The current forecast period extends through 22/09/2026 at 8:00 PM. 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.