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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 · 7:40 AM

St. Charles Weather & Hourly Forecast

United States · Idaho · 83272

54°F

Overcast

Feels like: 51°F

💧 Humidity 52% 🌡 Pressure 29.97 inHg 💨 Wind 1 mph 👁 Visibility 32.1 mi ☁ Clouds 99% ☀️ UV index 0.0 · Low 🌅 Sunrise 7:11 AM 🌇 Sunset 7:24 PM

Hourly Forecast for St. Charles

Today

8:00 AM

Overcast

56° 💧 0.041 in 💨 0 mph H 55%30.00 inHg

11:00 AM

Light rain

54° 💧 0.028 in 💨 2 mph H 83%30.03 inHg

2:00 PM

Mostly cloudy

59° 💧 0.086 in 💨 5 mph H 61%29.94 inHg

5:00 PM

Light rain

56° 💧 0.021 in 💨 4 mph H 75%29.97 inHg

8:00 PM

Light rain

51° 💧 0.052 in 💨 3 mph H 87%29.97 inHg

11:00 PM

Light rain

48° 💧 0.061 in 💨 2 mph H 96%30.03 inHg

Tomorrow

2:00 AM

Mostly clear night

47° 💧 0.002 in 💨 2 mph H 92%30.06 inHg

5:00 AM

Mostly clear night

46° 💧 None 💨 1 mph H 95%30.09 inHg

8:00 AM

Partly cloudy

46° 💧 0.001 in 💨 1 mph H 97%30.15 inHg

11:00 AM

Mostly sunny

56° 💧 0.009 in 💨 3 mph H 74%30.18 inHg

2:00 PM

Mostly sunny

61° 💧 0.007 in 💨 5 mph H 62%30.09 inHg

5:00 PM

Sunny

64° 💧 None 💨 4 mph H 47%30.06 inHg

8:00 PM

Mostly clear night

58° 💧 None 💨 1 mph H 60%30.09 inHg

11:00 PM

Overcast night

53° 💧 None 💨 2 mph H 73%30.12 inHg

Thursday

2:00 AM

Mostly cloudy night

51° 💧 None 💨 1 mph H 67%30.15 inHg

5:00 AM

Overcast night

49° 💧 None 💨 1 mph H 68%30.15 inHg

Today

8:00 AM

Overcast

56° 💧 None 💨 0 mph H 55%30.00 inHg

9:00 AM

Light rain

55° 💧 0.019 in 💨 5 mph H 75%30.03 inHg

10:00 AM

Light rain

54° 💧 0.022 in 💨 5 mph H 86%30.03 inHg

11:00 AM

Light rain

54° 💧 0.023 in 💨 2 mph H 83%30.03 inHg

12:00 PM

Light rain

56° 💧 0.004 in 💨 4 mph H 72%30.03 inHg

1:00 PM

Mostly sunny

58° 💧 0.000 in 💨 5 mph H 62%30.00 inHg

2:00 PM

Mostly cloudy

59° 💧 0.003 in 💨 5 mph H 61%29.94 inHg

3:00 PM

Light rain

55° 💧 0.026 in 💨 6 mph H 76%29.97 inHg

4:00 PM

Light rain

55° 💧 0.057 in 💨 8 mph H 84%29.97 inHg

5:00 PM

Light rain

56° 💧 0.005 in 💨 4 mph H 75%29.97 inHg

6:00 PM

Light rain

56° 💧 0.010 in 💨 0 mph H 70%29.94 inHg

7:00 PM

Light rain

53° 💧 0.006 in 💨 2 mph H 81%29.97 inHg

8:00 PM

Light rain

51° 💧 0.006 in 💨 3 mph H 87%29.97 inHg

9:00 PM

Mostly clear night

50° 💧 None 💨 2 mph H 92%30.00 inHg

10:00 PM

Light rain

48° 💧 0.046 in 💨 3 mph H 95%30.03 inHg

11:00 PM

Light rain

48° 💧 0.040 in 💨 2 mph H 96%30.03 inHg

Tomorrow

12:00 AM

Light rain

49° 💧 0.008 in 💨 1 mph H 95%30.03 inHg

1:00 AM

Light rain

48° 💧 0.014 in 💨 1 mph H 92%30.03 inHg

2:00 AM

Mostly clear night

47° 💧 0.001 in 💨 2 mph H 92%30.06 inHg

3:00 AM

Mostly clear night

47° 💧 0.001 in 💨 2 mph H 95%30.06 inHg

4:00 AM

Mostly cloudy night

46° 💧 None 💨 2 mph H 97%30.06 inHg

5:00 AM

Mostly clear night

46° 💧 None 💨 1 mph H 95%30.09 inHg

6:00 AM

Mostly clear night

45° 💧 None 💨 1 mph H 97%30.12 inHg

7:00 AM

Mostly clear night

45° 💧 None 💨 1 mph H 97%30.15 inHg

8:00 AM

Partly cloudy

46° 💧 None 💨 1 mph H 97%30.15 inHg

9:00 AM

Partly cloudy

50° 💧 None 💨 2 mph H 94%30.18 inHg

10:00 AM

Partly cloudy

53° 💧 0.001 in 💨 2 mph H 83%30.18 inHg

11:00 AM

Mostly sunny

56° 💧 0.001 in 💨 3 mph H 74%30.18 inHg

12:00 PM

Light rain

58° 💧 0.004 in 💨 4 mph H 69%30.15 inHg

1:00 PM

Light rain

60° 💧 0.004 in 💨 5 mph H 66%30.12 inHg

2:00 PM

Mostly sunny

61° 💧 0.002 in 💨 5 mph H 62%30.09 inHg

3:00 PM

Sunny

63° 💧 0.004 in 💨 4 mph H 57%30.09 inHg

4:00 PM

Sunny

63° 💧 0.001 in 💨 4 mph H 51%30.06 inHg

5:00 PM

Sunny

64° 💧 None 💨 4 mph H 47%30.06 inHg

6:00 PM

Sunny

63° 💧 None 💨 4 mph H 49%30.06 inHg

7:00 PM

Sunny

60° 💧 None 💨 1 mph H 61%30.06 inHg

8:00 PM

Mostly clear night

58° 💧 None 💨 1 mph H 60%30.09 inHg

9:00 PM

Mostly cloudy night

55° 💧 None 💨 2 mph H 64%30.09 inHg

10:00 PM

Overcast night

53° 💧 None 💨 2 mph H 70%30.12 inHg

11:00 PM

Overcast night

53° 💧 None 💨 2 mph H 73%30.12 inHg

Thursday

12:00 AM

Overcast night

52° 💧 None 💨 1 mph H 70%30.12 inHg

1:00 AM

Mostly cloudy night

52° 💧 None 💨 1 mph H 69%30.15 inHg

2:00 AM

Mostly cloudy night

51° 💧 None 💨 1 mph H 67%30.15 inHg

3:00 AM

Mostly cloudy night

51° 💧 None 💨 1 mph H 67%30.15 inHg

4:00 AM

Overcast night

50° 💧 None 💨 1 mph H 67%30.15 inHg

5:00 AM

Overcast night

49° 💧 None 💨 1 mph H 68%30.15 inHg

6:00 AM

Overcast night

49° 💧 None 💨 1 mph H 69%30.18 inHg

7:00 AM

Overcast night

48° 💧 None 💨 2 mph H 70%30.18 inHg

8:00 AM

Overcast

48° 💧 None 💨 2 mph H 72%30.18 inHg

9:00 AM

Overcast

51° 💧 None 💨 2 mph H 68%30.18 inHg

10:00 AM

Overcast

54° 💧 None 💨 1 mph H 69%30.18 inHg

11:00 AM

Overcast

57° 💧 None 💨 2 mph H 68%30.15 inHg

12:00 PM

Overcast

60° 💧 None 💨 5 mph H 63%30.12 inHg

1:00 PM

Overcast

61° 💧 None 💨 6 mph H 57%30.09 inHg

2:00 PM

Overcast

63° 💧 None 💨 6 mph H 52%30.06 inHg

3:00 PM

Overcast

65° 💧 None 💨 6 mph H 47%30.03 inHg

4:00 PM

Overcast

65° 💧 None 💨 6 mph H 44%30.00 inHg

5:00 PM

Overcast

65° 💧 None 💨 6 mph H 44%29.97 inHg

6:00 PM

Overcast

63° 💧 None 💨 5 mph H 49%29.97 inHg

Friday

3:00 AM

Overcast night

48° 💧 None 💨 1 mph H 51%30.00 inHg

6:00 AM

Clear night

48° 💧 None 💨 2 mph H 57%29.97 inHg

9:00 AM

Sunny

56° 💧 None 💨 3 mph H 45%29.97 inHg

12:00 PM

Mostly sunny

65° 💧 None 💨 4 mph H 29%29.94 inHg

3:00 PM

Partly cloudy

67° 💧 None 💨 9 mph H 24%29.85 inHg

6:00 PM

Sunny

64° 💧 None 💨 7 mph H 28%29.85 inHg

9:00 PM

Mostly clear night

50° 💧 None 💨 4 mph H 49%29.88 inHg

Saturday

12:00 AM

Mostly clear night

51° 💧 None 💨 3 mph H 40%29.85 inHg

3:00 AM

Partly cloudy night

50° 💧 None 💨 5 mph H 43%29.85 inHg

6:00 AM

Mostly clear night

44° 💧 None 💨 4 mph H 58%29.97 inHg

9:00 AM

Mostly sunny

53° 💧 None 💨 1 mph H 47%30.03 inHg

12:00 PM

Mostly sunny

60° 💧 None 💨 1 mph H 38%30.00 inHg

3:00 PM

Partly cloudy

65° 💧 None 💨 4 mph H 27%29.94 inHg

6:00 PM

Mostly sunny

62° 💧 None 💨 3 mph H 32%29.94 inHg

9:00 PM

Mostly clear night

50° 💧 None 💨 2 mph H 56%29.97 inHg

Sunday

12:00 AM

Partly cloudy night

50° 💧 None 💨 1 mph H 48%30.00 inHg

3:00 AM

Mostly clear night

49° 💧 None 💨 2 mph H 54%29.97 inHg

6:00 AM

Mostly clear night

49° 💧 None 💨 3 mph H 56%29.94 inHg

9:00 AM

Sunny

57° 💧 None 💨 3 mph H 46%29.97 inHg

12:00 PM

Mostly sunny

65° 💧 None 💨 7 mph H 28%29.91 inHg

3:00 PM

Sunny

67° 💧 None 💨 10 mph H 23%29.85 inHg

6:00 PM

Partly cloudy

63° 💧 None 💨 6 mph H 29%29.80 inHg

9:00 PM

Overcast night

52° 💧 None 💨 3 mph H 50%29.83 inHg

Monday

12:00 AM

Overcast night

49° 💧 None 💨 3 mph H 58%29.83 inHg

6:00 AM

Mostly cloudy night

50° 💧 None 💨 2 mph H 50%29.88 inHg

12:00 PM

Partly cloudy

49° 💧 None 💨 0 mph H 54%29.88 inHg

6:00 PM

Light rain

56° 💧 None 💨 3 mph H 60%29.88 inHg

Tuesday

12:00 AM

Light rain

51° 💧 None 💨 2 mph H 73%29.88 inHg

6:00 AM

Mostly clear night

45° 💧 None 💨 2 mph H 71%29.91 inHg

12:00 PM

Sunny

41° 💧 None 💨 3 mph H 68%29.94 inHg

6:00 PM

Sunny

58° 💧 None 💨 2 mph H 38%29.97 inHg

Wednesday

12:00 AM

Clear night

58° 💧 None 💨 1 mph H 30%29.91 inHg

6:00 AM

Clear night

46° 💧 None 💨 2 mph H 42%29.94 inHg

12:00 PM

Sunny

43° 💧 None 💨 1 mph H 39%29.97 inHg

6:00 PM

Sunny

61° 💧 None 💨 2 mph H 32%29.94 inHg

Thursday

12:00 AM

Clear night

61° 💧 None 💨 1 mph H 38%29.85 inHg

6:00 AM

Clear night

49° 💧 None 💨 2 mph H 36%29.85 inHg

12:00 PM

Sunny

47° 💧 None 💨 1 mph H 38%29.83 inHg

6:00 PM

Sunny

63° 💧 None 💨 4 mph H 32%29.83 inHg

Friday

12:00 AM

Mostly clear night

63° 💧 None 💨 3 mph H 30%29.74 inHg

6:00 AM

Mostly cloudy night

48° 💧 None 💨 2 mph H 87%29.83 inHg

12:00 PM

Partly cloudy

45° 💧 None 💨 0 mph H 88%29.83 inHg

6:00 PM

Light rain

57° 💧 None 💨 2 mph H 57%29.77 inHg

Saturday

12:00 AM

Light rain

44° 💧 None 💨 5 mph H 95%29.88 inHg

6:00 AM

Overcast night

42° 💧 None 💨 5 mph H 96%30.03 inHg

12:00 PM

Mostly cloudy

39° 💧 None 💨 3 mph H 91%30.06 inHg

6:00 PM

Partly cloudy

52° 💧 None 💨 7 mph H 55%30.12 inHg

Sunday

12:00 AM

Mostly clear night

52° 💧 None 💨 5 mph H 55%30.12 inHg

6:00 AM

Mostly clear night

44° 💧 None 💨 1 mph H 76%30.21 inHg

12:00 PM

Mostly sunny

39° 💧 None 💨 2 mph H 86%30.27 inHg

6:00 PM

Sunny

51° 💧 None 💨 6 mph H 58%30.27 inHg

Monday

12:00 AM

Clear night

54° 💧 None 💨 2 mph H 48%30.12 inHg

6:00 AM

Clear night

43° 💧 None 💨 1 mph H 75%30.18 inHg

12:00 PM

Sunny

41° 💧 None 💨 2 mph H 74%30.18 inHg

6:00 PM

Sunny

60° 💧 None 💨 1 mph H 39%30.18 inHg

Tuesday

12:00 AM

Clear night

60° 💧 None 💨 1 mph H 41%30.12 inHg

6:00 AM

Clear night

48° 💧 None 💨 1 mph H 35%30.18 inHg

12:00 PM

Sunny

44° 💧 None 💨 0 mph H 50%30.21 inHg

6:00 PM

Sunny

62° 💧 None 💨 3 mph H 41%30.24 inHg

Wednesday

12:00 AM

Clear night

62° 💧 None 💨 1 mph H 47%30.15 inHg

In St. Charles and, more broadly, across the state of Idaho: Clear skies will prevail through the evening, with temperatures remaining cool at around 58 degrees. Light southeast winds will continue, reaching up to 2 mph with occasional gusts up to 7 mph. No precipitation is expected during this time, providing a calm and clear night ahead. Conditions are ideal for outdoor activities if you plan to be outside tonight. Temperatures are likely to stay steady in the low 50s later in the evening.

15-Day Weather Outlook for St. Charles

TomorrowTomorrow

Mostly sunny 64°/45° 💧 None 💨 5 mph

Thursday, Sep 24Thu Sep 24

Overcast 65°/48° 💧 None 💨 6 mph

Friday, Sep 25Fri Sep 25

Mostly sunny 67°/48° 💧 0.392 in 💨 9 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 65°/44° 💧 0.002 in 💨 5 mph

Sunday, Sep 27Sun Sep 27

Partly cloudy 67°/49° 💧 0.005 in 💨 10 mph

Monday, Sep 28Mon Sep 28

Light rain 56°/49° 💧 0.090 in 💨 3 mph

Tuesday, Sep 29Tue Sep 29

Light rain 58°/41° 💧 0.198 in 💨 3 mph

Wednesday, Sep 30Wed Sep 30

Sunny 61°/43° 💧 None 💨 2 mph

Thursday, Oct 1Thu Oct 1

Sunny 63°/47° 💧 None 💨 4 mph

Friday, Oct 2Fri Oct 2

Light rain 63°/45° 💧 0.185 in 💨 3 mph

Saturday, Oct 3Sat Oct 3

Light rain 52°/39° 💧 0.189 in 💨 7 mph

Sunday, Oct 4Sun Oct 4

Mostly sunny 52°/39° 💧 0.002 in 💨 6 mph

Monday, Oct 5Mon Oct 5

Sunny 60°/41° 💧 None 💨 2 mph

Tuesday, Oct 6Tue Oct 6

Sunny 62°/44° 💧 None 💨 3 mph

Wednesday, Oct 7Wed Oct 7

Sunny 62°/62° 💧 None 💨 1 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 8:00 AM

PM2.5 Fine particles Good 3,3µg/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 5,0µg/m³

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

O₃ Ozone Good 54,5µg/m³

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

NO₂ Nitrogen dioxide Good 8,6µg/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 5,2Moderate 😊Good

Tomorrow UV 6,2High 😐Moderate

Thursday UV 6,4High 🙂Fair

Friday UV 5,9Moderate 😐Moderate

Saturday UV 6,0High 🙂Fair

Sunday UV 5,0Moderate —Unavailable

Monday UV 6,0High —Unavailable

Hourly UV index today

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

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

Moderate UV risk

Sunglasses and sun protection are recommended for 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, IDAHO

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

77/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 8:56 PM–5:40 AM

☁ Cloud cover 26% Real hourly forecast for the best viewing hour.

☾ Moonlight 89% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 63° high at the best hour.

✦ Estimated visible meteors 1–3/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min63%

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

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

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% 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. Charles were last refreshed today at 6:55 AM. The current forecast period extends through 24/09/2026 at 5:00 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.