Missouri River at Fort Randall Dam
20 mi- Level
- 1344 ft
Reading from Sat 4 PM · NWS gauge page
Observed 5:50 PM CDT at KMHE
Armour, SD weather
Overcast and 48°9°, rain tomorrow ~3–11 AM (92%).
Today: low 41°5° (likely 41°5° to 48°9°), high 67°19° (likely 67°19° to 68°20°).
Now 48°9°
Cloudy · Feels like 45°7°
- Wind
- 7 mph11 km/h
- From the north-northwest. 58–7 mph11 km/h through 6 AM
- Dew point
- 36°2°
- Comfortable
- UV tomorrow
- 0Low
- Low all day (peak 0)
- Pressure
- 30.35 inHg1028 hPa
- Rising slowly · +0.02 inHg+0.7 hPa in 3 h
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
Good hours for
TonightDown to 43°6° by 5 AM · Rain 6–7 PM (70%)
Tomorrow morningUp to 47°8° by 11 AM · Rain all morning (90%)
Tomorrow afternoonNear 47°8° · Rain all afternoon (50%)
Tomorrow nightDown to 40°4° by 5 AM · Rain all night (100%)
Monday morningUp to 45°7° by 11 AM · Rain all morning (100%) · gusts to 25 mph40 km/h
Monday afternoonNear 48°9° · Rain all afternoon (100%) · gusts to 25 mph40 km/h
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 6p | Showers | 48°9° (likely 48°9° to 51°11°) | 44°7° | 70%, 0.01 in0.3 mm | 10 mph16 km/h from N, gusts 10 mph16 km/h | 74% | 100% | 0 |
| Sat 7p | Showers | 48°9° (likely 47°8° to 50°10°) | 45°7° | 20%, 0.01 in0.3 mm | 5 mph8 km/h from N, gusts 8 mph13 km/h | 74% | 99% | 0 |
| Sat 8p | Cloudy | 49°9° (likely 47°8° to 49°9°) | 47°8° | 20%, 0.01 in0.3 mm | 5 mph8 km/h from NNE, gusts 6 mph10 km/h | 71% | 100% | 0 |
| Sat 9p | Drizzle | 49°9° (likely 46°8° to 49°9°) | 47°8° | 20%, 0.01 in0.3 mm | 5 mph8 km/h from N, gusts 5 mph8 km/h | 71% | 100% | 0 |
| Sat 10p | Drizzle | 48°9° (likely 46°8° to 48°9°) | 47°8° | 10%, 0.01 in0.3 mm | 5 mph8 km/h from N, gusts 7 mph11 km/h | 74% | 100% | 0 |
| Sat 11p | Drizzle | 48°9° (likely 46°8° to 48°9°) | 47°8° | 10%, 0.01 in0.3 mm | 5 mph8 km/h from N, gusts 6 mph10 km/h | 74% | 100% | 0 |
| Sun 12a | Cloudy | 48°9° (likely 46°8° to 48°9°) | 47°8° | 20%, 0.01 in0.3 mm | 5 mph8 km/h from N, gusts 6 mph10 km/h | 77% | 100% | 0 |
| Sun 1a | Cloudy | 47°8° (likely 46°8° to 47°8°) | 45°7° | 20%, 0.03 in0.8 mm | 5 mph8 km/h from N, gusts 6 mph9 km/h | 79% | 100% | 0 |
| Sun 2a | Cloudy | 46°8° (likely 46°8° to 47°8°) | 44°7° | 40%, 0.03 in0.8 mm | 5 mph8 km/h from NNE, gusts 6 mph10 km/h | 76% | 100% | 0 |
| Sun 3a | Cloudy | 45°7° (likely 45°7° to 47°8°) | 43°6° | 50%, 0.03 in0.8 mm | 5 mph8 km/h from NNE, gusts 6 mph10 km/h | 79% | 100% | 0 |
| Sun 4a | Cloudy | 45°7° (likely 45°7° to 47°8°) | 42°6° | 70%, 0.03 in0.8 mm | 5 mph8 km/h from NE, gusts 7 mph11 km/h | 82% | 98% | 0 |
| Sun 5a | Cloudy | 43°6° (likely 43°6° to 47°8°) | 39°4° | 60%, 0.03 in0.8 mm | 5 mph8 km/h from ENE, gusts 7 mph11 km/h | 89% | 100% | 0 |
| Sun 6a | Cloudy | 43°6° (likely 43°6° to 48°9°) | 39°4° | 70%, 0.03 in0.8 mm | 5 mph8 km/h from ENE, gusts 9 mph14 km/h | 93% | 100% | 0 |
| Sun 7a | Showers | 43°6° (likely 43°6° to 48°9°) | 39°4° | 70%, 0.11 in2.8 mm | 5 mph8 km/h from ENE, gusts 11 mph18 km/h | 93% | 100% | 0 |
| Sun 8a | Cloudy | 41°5° (likely 41°5° to 47°8°) | 36°2° | 90%, 0.11 in2.8 mm | 5 mph8 km/h from NE, gusts 12 mph20 km/h | 100% | 100% | 0 |
| Sun 9a | Drizzle | 42°6° (likely 42°6° to 47°8°) | 37°3° | 90%, 0.11 in2.8 mm | 10 mph16 km/h from ENE, gusts 10 mph16 km/h | 100% | 100% | 0 |
| Sun 10a | Drizzle | 46°8° (likely 45°7° to 47°8°) | 41°5° | 70%, 0.11 in2.8 mm | 10 mph16 km/h from ENE, gusts 11 mph18 km/h | 96% | 100% | 0 |
| Sun 11a | Drizzle | 47°8° (likely 45°7° to 48°9°) | 42°6° | 50%, 0.11 in2.8 mm | 10 mph16 km/h from NE, gusts 10 mph16 km/h | 93% | 100% | 0 |
| Sun 12p | Rain | 47°8° (likely 45°7° to 48°9°) | 42°6° | 30%, 0.11 in2.8 mm | 10 mph16 km/h from NE, gusts 13 mph21 km/h | 93% | 100% | 0 |
| Sun 1p | Cloudy | 47°8° (likely 45°7° to 48°9°) | 42°6° | 50%, 0.09 in2.3 mm | 10 mph16 km/h from NE, gusts 13 mph21 km/h | 93% | 100% | 0 |
| Sun 2p | Cloudy | 49°9° (likely 45°7° to 49°9°) | 44°7° | 50%, 0.09 in2.3 mm | 10 mph16 km/h from NE, gusts 15 mph24 km/h | 86% | 100% | 0 |
| Sun 3p | Cloudy | 47°8° (likely 45°7° to 49°9°) | 41°5° | 40%, 0.09 in2.3 mm | 15 mph24 km/h from NE, gusts 16 mph26 km/h | 89% | 100% | 0 |
| Sun 4p | Cloudy | 47°8° (likely 44°7° to 49°9°) | 41°5° | 40%, 0.09 in2.3 mm | 15 mph24 km/h from NE, gusts 16 mph26 km/h | 89% | 100% | 0 |
| Sun 5p | Cloudy | 47°8° (likely 44°7° to 49°9°) | 41°5° | 50%, 0.09 in2.3 mm | 15 mph24 km/h from NE, gusts 18 mph28 km/h | 89% | 100% | 0 |
| Sun 6p | Cloudy | 47°8° (likely 43°6° to 48°9°) | 42°6° | 70%, 0.09 in2.3 mm | 10 mph16 km/h from NE, gusts 19 mph31 km/h | 89% | 100% | 0 |
| Sun 7p | Drizzle | 46°8° (likely 42°6° to 47°8°) | 41°5° | 40%, 0.11 in2.8 mm | 10 mph16 km/h from NE, gusts 20 mph32 km/h | 93% | 100% | 0 |
| Sun 8p | Showers | 44°7° (likely 42°6° to 46°8°) | 38°3° | 40%, 0.11 in2.8 mm | 10 mph16 km/h from NE, gusts 20 mph33 km/h | 96% | 100% | 0 |
| Sun 9p | Drizzle | 43°6° (likely 41°5° to 46°8°) | 37°3° | 50%, 0.11 in2.8 mm | 10 mph16 km/h from NE, gusts 22 mph36 km/h | 100% | 100% | 0 |
| Sun 10p | Rain | 43°6° (likely 40°4° to 45°7°) | 37°3° | 60%, 0.11 in2.8 mm | 10 mph16 km/h from NE, gusts 23 mph37 km/h | 100% | 100% | 0 |
| Sun 11p | Drizzle | 42°6° (likely 40°4° to 45°7°) | 36°2° | 60%, 0.11 in2.8 mm | 10 mph16 km/h from NE, gusts 21 mph34 km/h | 100% | 100% | 0 |
| Mon 12a | Rain | 42°6° (likely 40°4° to 44°7°) | 36°2° | 80%, 0.11 in2.8 mm | 10 mph16 km/h from NE, gusts 21 mph33 km/h | 100% | 100% | 0 |
| Mon 1a | Rain | 41°5° (likely 40°4° to 44°7°) | 34°1° | 100%, 0.41 in10 mm | 15 mph24 km/h from NE, gusts 21 mph34 km/h | 100% | 100% | 0 |
| Mon 2a | Rain | 41°5° (likely 40°4° to 44°7°) | 34°1° | 100%, 0.41 in10 mm | 15 mph24 km/h from NE, gusts 22 mph36 km/h | 100% | 100% | 0 |
| Mon 3a | Drizzle | 41°5° (likely 40°4° to 43°6°) | 34°1° | 100%, 0.41 in10 mm | 15 mph24 km/h from ENE, gusts 22 mph35 km/h | 100% | 100% | 0 |
| Mon 4a | Showers | 41°5° (likely 40°4° to 43°6°) | 34°1° | 100%, 0.41 in10 mm | 15 mph24 km/h from ENE, gusts 23 mph36 km/h | 100% | 100% | 0 |
| Mon 5a | Rain | 40°4° (likely 40°4° to 43°6°) | 32°0° | 90%, 0.41 in10 mm | 15 mph24 km/h from ENE, gusts 21 mph34 km/h | 100% | 100% | 0 |
| Mon 6a | Rain | 40°4° (likely 40°4° to 44°7°) | 32°0° | 100%, 0.41 in10 mm | 15 mph24 km/h from ENE, gusts 23 mph37 km/h | 100% | 100% | 0 |
| Mon 7a | Showers | 40°4° (likely 40°4° to 44°7°) | 32°0° | 100%, 0.32 in8.1 mm | 15 mph24 km/h from ENE, gusts 22 mph36 km/h | 100% | 100% | 0 |
| Mon 8a | Showers | 37°3° (likely 37°3° to 43°6°) | 28°−2° | 100%, 0.32 in8.1 mm | 15 mph24 km/h from ENE, gusts 24 mph39 km/h | 100% | 100% | 0 |
| Mon 9a | Rain | 40°4° (likely 40°4° to 43°6°) | 32°0° | 100%, 0.32 in8.1 mm | 15 mph24 km/h from ENE, gusts 25 mph40 km/h | 100% | 100% | 0 |
| Mon 10a | Rain | 44°7° (likely 41°5° to 44°7°) | 37°3° | 100%, 0.32 in8.1 mm | 15 mph24 km/h from ENE, gusts 24 mph39 km/h | 100% | 100% | 0 |
| Mon 11a | Rain | 45°7° (likely 41°5° to 45°7°) | 38°3° | 100%, 0.32 in8.1 mm | 15 mph24 km/h from ENE, gusts 25 mph40 km/h | 100% | 100% | 0 |
| Mon 12p | Rain | 46°8° (likely 41°5° to 46°8°) | 40°4° | 100%, 0.32 in8.1 mm | 15 mph24 km/h from E, gusts 25 mph41 km/h | 100% | 100% | 0 |
| Mon 1p | Showers | 46°8° (likely 41°5° to 46°8°) | 40°4° | 100%, 0.28 in7.1 mm | 15 mph24 km/h from E, gusts 24 mph39 km/h | 100% | 100% | 0 |
| Mon 2p | Showers | 47°8° (likely 42°6° to 48°9°) | 41°5° | 100%, 0.28 in7.1 mm | 15 mph24 km/h from E, gusts 22 mph35 km/h | 100% | 100% | 1 |
| Mon 3p | Rain | 48°9° (likely 42°6° to 50°10°) | 42°6° | 100%, 0.28 in7.1 mm | 15 mph24 km/h from ENE, gusts 21 mph34 km/h | 96% | 100% | 0 |
| Mon 4p | Showers | 48°9° (likely 43°6° to 51°11°) | 42°6° | 100%, 0.28 in7.1 mm | 15 mph24 km/h from ENE, gusts 20 mph33 km/h | 100% | 100% | 0 |
| Mon 5p | Showers | 49°9° (likely 43°6° to 52°11°) | 44°7° | 100%, 0.28 in7.1 mm | 15 mph24 km/h from ENE, gusts 19 mph31 km/h | 96% | 100% | 0 |
Days ahead
Tap a day for its hours and the official wording.
Today, Oct 24. Drizzle. High 67°19°, low 41°5°. Rain 0.13 in3.3 mm, 50% chance. Forecasts agree.
Evening
6 PM–midnight
Showers, 49°9°70% chance · 0.06 in1.5 mm
Overnight
midnight–6 AM
Cloudy, 43°6°70% chance · 0.16 in4.1 mm
Official NWS forecast
Tonight: Rain showers likely. Cloudy, with a low around 41. North northeast wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 67°19°–68°20°
- Low, likely
- 41°5°–48°9°
- Wind
- 24 mph39 km/h, gusts 41 mph66 km/h
- UV peak
- 2
Tomorrow, Oct 25. Showers. High 49°9°, low 36°2°. Rain 0.34 in8.6 mm, 90% chance. Mostly agree.
Morning
6 AM–noon
Showers, 41°5°90% chance · 0.58 in15 mm
Afternoon
noon–6 PM
Rain, 49°9°50% chance · 0.56 in14 mm
Evening
6 PM–midnight
Rain, 44°7°70% chance · 0.64 in16 mm
Overnight
midnight–6 AM
Rain, 40°4°100% chance · 2.2 in55 mm
Official NWS forecast
Day: Rain showers. Cloudy, with a high near 49. Northeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Night: Rain showers. Cloudy. Low around 36, with temperatures rising to around 40 overnight. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 47°8°–49°9°
- Low, likely
- 36°2°–44°7°
- Wind
- 14 mph22 km/h, gusts 26 mph41 km/h
Monday, Oct 26. Showers. High 50°10°, low 36°2°. Rain 1.4 in35 mm, 100% chance. Forecasts differ.
Morning
6 AM–noon
Rain, 37°3°100% chance · 2 in51 mm
Afternoon
noon–6 PM
Rain, 49°9°100% chance · 1.7 in44 mm
Evening
6 PM–midnight
Drizzle, 48°9°90% chance · 0.15 in3.7 mm
Overnight
midnight–6 AM
Cloudy, 42°5°70% chance
Official NWS forecast
Day: Rain showers. Cloudy, with a high near 50. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Night: Rain showers before 1am. Cloudy, with a low around 36. North wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 45°7°–54°12°
- Low, likely
- 36°2°–43°6°
- Wind
- 17 mph28 km/h, gusts 28 mph45 km/h
Tuesday, Oct 27. Drizzle. High 58°14°, low 41°5°. Rain 0.08 in2 mm, 10% chance. Mostly agree.
Morning
6 AM–noon
Partly sunny, 40°4°Dry
Afternoon
noon–6 PM
Partly sunny, 54°12°Dry
Evening
6 PM–midnight
Clear, 53°12°20% chance · 0.03 in0.7 mm
Overnight
midnight–6 AM
Clear, 46°8°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 58. Southwest wind 5 to 10 mph.
Night: Partly cloudy, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 54°12°–58°14°
- Low, likely
- 39°4°–41°5°
- Wind
- 20 mph32 km/h, gusts 32 mph51 km/h
- UV peak
- 3
Wednesday, Oct 28. Mostly sunny. High 63°17°, low 40°4°. Dry. Forecasts differ.
Morning
6 AM–noon
Cloudy, 46°8°Dry
Afternoon
noon–6 PM
Partly sunny, 62°16°Dry
Evening
6 PM–midnight
Cloudy, 53°12°Dry
Overnight
midnight–6 AM
Clear, 42°6°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 63.
Night: Mostly clear, with a low around 40.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 57°14°–66°19°
- Low, likely
- 39°4°–48°9°
- Wind
- 14 mph23 km/h, gusts 35 mph56 km/h
- UV peak
- 4
Thursday, Oct 29. Cloudy. High 65°18°, low 47°8°. Dry. Forecasts agree.
Morning
6 AM–noon
Sunny, 42°6°Dry
Afternoon
noon–6 PM
Sunny, 61°16°Dry
Evening
6 PM–midnight
Mostly clear, 55°13°Dry
Overnight
midnight–6 AM
Cloudy, 53°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 65.
Night: Partly cloudy, with a low around 47.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 60°16°–65°18°
- Low, likely
- 36°2°–47°8°
- Wind
- 12 mph20 km/h, gusts 29 mph46 km/h
- UV peak
- 4
Friday, Oct 30. Mostly cloudy. High 67°19°, low 48°9°. Rain 0.03 in0.8 mm, 20% chance. Forecasts agree.
Morning
6 AM–noon
Drizzle, 54°12°Dry
Afternoon
noon–6 PM
Cloudy, 67°20°Dry
Evening
6 PM–midnight
Cloudy, 62°17°Dry
Overnight
midnight–6 AM
Mostly clear, 56°13°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers after 1pm. Partly sunny, with a high near 67.
Night: A chance of rain showers. Mostly cloudy, with a low around 48. Chance of precipitation is 50%.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 66°19°–68°20°
- Low, likely
- 48°9°–54°12°
- Wind
- 15 mph24 km/h, gusts 35 mph56 km/h
- UV peak
- 2
Saturday, Oct 31. Showers. High 62°17°, low 52°11°. Rain 0.35 in8.9 mm, 40% chance. Forecasts differ.
Morning
6 AM–noon
Drizzle, 56°14°30% chance · 0.03 in0.8 mm
Afternoon
noon–6 PM
Showers, 61°16°30% chance · 0.23 in5.8 mm
Evening
6 PM–midnight
Showers, 55°13°30% chance · 0.22 in5.5 mm
Overnight
midnight–6 AM
Partly cloudy, 48°9°30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Mostly cloudy, with a high near 62. Chance of precipitation is 40%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 54°12°–68°20°
- Low, likely
- 45°7°–58°14°
- Wind
- 16 mph26 km/h, gusts 35 mph56 km/h
Sunday, Nov 1. Drizzle. High 55°13°, low 46°8°. Rain 0.07 in1.8 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 47°8°Dry
Afternoon
noon–6 PM
Cloudy, 53°12°Dry
Evening
6 PM–midnight
Partly cloudy, 50°10°Dry
Overnight
midnight–6 AM
Clear, 46°8°20% chance · 0.21 in5.5 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 44°7°–66°19°
- Low, likely
- 38°3°–56°13°
- Wind
- 17 mph28 km/h, gusts 56 mph90 km/h
- UV peak
- 2
Monday, Nov 2. Sunny. High 57°14°, low 43°6°. Rain 0.28 in7.1 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Sunny, 47°8°30% chance · 0.04 in1.1 mm
Afternoon
noon–6 PM
Sunny, 57°14°30% chance
Evening
6 PM–midnight
Clear, 49°10°30% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 53°12°–63°17°
- Low, likely
- 39°4°–50°10°
- Wind
- 23 mph37 km/h, gusts 52 mph84 km/h
- UV peak
- 3
The outlook
Today
53% chance of rain, high 67°, low 41°.
Tomorrow
92% chance of rain, high 49°, low 36°, cooling off.
Monday
99% chance of rain, high 50°, low 36°.
Rest of week
Mostly dry, highs 55–67°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (FSD) (opens in a new tab)
What changed since yesterday
No meaningful changes from yesterday’s forecast.
Radar
Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view
Rivers
NOAA river gauges within 25 mi
Below flood stage
Sun & moon
Sun
Sunrise 7:58 AM, sunset 6:35 PM.
- Daylight
- 10 h 37 min
- Losing 2 min 44 s a day; shortest Dec 21, 1 h 39 min less
- Golden hour
- 5:56–6:53 PM
- Morning 7:40–8:38 AM
- Blue hour
- 6:53–7:05 PM
- Morning 7:29–7:40 AM; first light 7:29 AM
Stars tonight? Poor
Clouds most of the night (about 100% cover).
Moon
Waxing gibbous
98% lit · growing
- Today
- sets 6:12 AM · rises 5:35 PM
- Full moon
- Oct 25
- New moon
- Nov 9
