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Lacy SD Weather - Mostly Clear - 73°F
Mostly Clear
73°F
Updated 10:30 pm
Feels Like 66°F
Humidity 51%
Wind S 9 mph
Barometer  29.79 in
Dew Point 54°F
Lacy SD Weather - Mostly Clear - 23°C
Mostly Clear
23°C
Updated 10:30 pm
Feels Like 19°C
Humidity 51%
Wind S 14 km/h
Barometer  100.8 kPa
Dew Point 12°C
Lacy, SD Weather and Current Conditionslacy sd weather forecast

Lacy, SD Weather Forecast

Lacy South Dakota WeatherLacy, South Dakota Weather Weather Forecast
14 day API weather forecast for Lacy, South Dakota. Note: The 7-day weather forecast for Lacy, SD is the most reliable and accurate weather forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days ahead.
Lacy, SD Weather Forecast Dated: 1030 PM Fri Oct 23 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.

Friday, October 23, 2026

Mid-Morning
Lacy Weather - 2026-10-23 - Morning - Partly Cloudy
66°F 19°C
Partly Cloudy
Mid-Afternoon
Lacy Weather - 2026-10-23 - Afternoon - Sunny
81°F 27°C
Sunny
Early-Evening
Lacy Weather - 2026-10-23 - Evening - Clear
70°F 21°C
Clear
Warm and summery near 81°F 27°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds easing from SE 17 mph 27 km/h to SSW 8 mph 13 km/h.

Saturday, October 24, 2026

Mid-Morning
Lacy Weather - 2026-10-24 - Morning - Partly Cloudy
49°F 10°C
Partly Cloudy
Mid-Afternoon
Lacy Weather - 2026-10-24 - Afternoon - Partly Cloudy
56°F 13°C
Partly Cloudy
Early-Evening
Lacy Weather - 2026-10-24 - Evening - Cloudy
50°F 10°C
Cloudy
Cool and brisk at 56°F 13°C, partly cloudy in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds tapering down from NW 20 mph 32 km/h to ENE 3 mph 5 km/h.

Sunday, October 25, 2026

Mid-Morning
Lacy Weather - 2026-10-25 - Morning - Overcast
46°F 8°C
Overcast
Mid-Afternoon
Lacy Weather - 2026-10-25 - Afternoon - Drizzle
45°F 7°C
Drizzle
Early-Evening
Lacy Weather - 2026-10-25 - Evening - Drizzle
44°F 6°C
Drizzle
Chilly near 45°F 7°C, dry early, with showers continuing through afternoon and evening, with increasing humidity and steady pressure. Winds ENE at 9 mph 14 km/h.

Monday, October 26, 2026

Mid-Morning
Lacy Weather - 2026-10-26 - Morning - Light Rain
40°F 5°C
Light Rain
Mid-Afternoon
Lacy Weather - 2026-10-26 - Afternoon - Light Sleet
38°F 3°C
Light Sleet
Early-Evening
Lacy Weather - 2026-10-26 - Evening - Light Sleet
39°F 4°C
Light Sleet
Nippy around 38°F 3°C, rounds of showers expected off and on all day, with steady humidity and barometric pressure falling. Winds swinging from the ENE to the NNE at 10 mph 16 km/h.

Tuesday, October 27, 2026

Mid-Morning
Lacy Weather - 2026-10-27 - Morning - Overcast
39°F 4°C
Overcast
Mid-Afternoon
Lacy Weather - 2026-10-27 - Afternoon - Sunny
51°F 11°C
Sunny
Early-Evening
Lacy Weather - 2026-10-27 - Evening - Scattered Showers
47°F 8°C
Scattered Showers
Brisk around 51°F 11°C, scattered downpours possible, with steady humidity and barometric pressure falling. Winds shifting from the WSW to the NNE at 7 mph 10 km/h. Gusts up to 26 mph 41 km/h.

Wednesday, October 28, 2026

Mid-Morning
Lacy Weather - 2026-10-28 - Morning - Partly Cloudy
45°F 7°C
Partly Cloudy
Mid-Afternoon
Lacy Weather - 2026-10-28 - Afternoon - Sunny
57°F 14°C
Sunny
Early-Evening
Lacy Weather - 2026-10-28 - Evening - Clear
50°F 10°C
Clear
Cool and brisk at 57°F 14°C, partly cloudy throughout the day, with steady humidity and steady pressure. Winds turning from the W to the ESE at 4 mph 6 km/h.

Thursday, October 29, 2026

Mid-Morning
Lacy Weather - 2026-10-29 - Morning - Sunny
52°F 11°C
Sunny
Mid-Afternoon
Lacy Weather - 2026-10-29 - Afternoon - Sunny
60°F 15°C
Sunny
Early-Evening
Lacy Weather - 2026-10-29 - Evening - Partly Cloudy
54°F 12°C
Partly Cloudy
Comfortable at 60°F 15°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure.

Friday, October 30, 2026

Mid-Morning
Lacy Weather - 2026-10-30 - Morning - Cloudy
53°F 12°C
Cloudy
Mid-Afternoon
Lacy Weather - 2026-10-30 - Afternoon - Partly Cloudy
63°F 17°C
Partly Cloudy
Early-Evening
Lacy Weather - 2026-10-30 - Evening - Partly Cloudy
60°F 16°C
Partly Cloudy
Cool with a high near 63°F 17°C, cloudy in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling. Winds out of the SSE at 11 mph 18 km/h.

Saturday, October 31, 2026

Mid-Morning
Lacy Weather - 2026-10-31 - Morning - Drizzle
57°F 14°C
Drizzle
Mid-Afternoon
Lacy Weather - 2026-10-31 - Afternoon - Cloudy
56°F 13°C
Cloudy
Early-Evening
Lacy Weather - 2026-10-31 - Evening - Overcast
52°F 11°C
Overcast
Brisk around 56°F 13°C, morning showers, giving way to clearing skies, with lower humidity and barometric pressure rising. Winds building from SSE at 2 mph 3 km/h to NW at 11 mph 17 km/h. Gusts up to 23 mph 37 km/h.

Sunday, November 1, 2026

Mid-Morning
Lacy Weather - 2026-11-01 - Morning - Overcast
48°F 9°C
Overcast
Mid-Afternoon
Lacy Weather - 2026-11-01 - Afternoon - Sunny
50°F 10°C
Sunny
Early-Evening
Lacy Weather - 2026-11-01 - Evening - Clear
47°F 9°C
Clear
Cool and brisk at 50°F 10°C, cloudy in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds swinging from the NW to the WNW at 11 mph 18 km/h. Gusts up to 27 mph 43 km/h.

Monday, November 2, 2026

Mid-Morning
Lacy Weather - 2026-11-02 - Morning - Partly Cloudy
48°F 9°C
Partly Cloudy
Mid-Afternoon
Lacy Weather - 2026-11-02 - Afternoon - Sunny
52°F 11°C
Sunny
Early-Evening
Lacy Weather - 2026-11-02 - Evening - Partly Cloudy
46°F 8°C
Partly Cloudy
Chilly near 52°F 11°C, sunny throughout the day, with increasing humidity and steady pressure. Winds shifting from the WNW to the NNW at 7 mph 11 km/h.

Tuesday, November 3, 2026

Mid-Morning
Lacy Weather - 2026-11-03 - Morning - Partly Cloudy
44°F 7°C
Partly Cloudy
Mid-Afternoon
Lacy Weather - 2026-11-03 - Afternoon - Overcast
48°F 9°C
Overcast
Early-Evening
Lacy Weather - 2026-11-03 - Evening - Overcast
44°F 7°C
Overcast
Crisp with a high near 48°F 9°C, partly cloudy in the morning, cloudy in the afternoon, and overcast this evening, with increasing humidity and barometric pressure falling.

Wednesday, November 4, 2026

Mid-Morning
Lacy Weather - 2026-11-04 - Morning - Overcast
46°F 8°C
Overcast
Mid-Afternoon
Lacy Weather - 2026-11-04 - Afternoon - Overcast
50°F 10°C
Overcast
Early-Evening
Lacy Weather - 2026-11-04 - Evening - Partly Cloudy
46°F 8°C
Partly Cloudy
Brisk around 50°F 10°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and steady pressure.

Thursday, November 5, 2026

Mid-Morning
Lacy Weather - 2026-11-05 - Morning - Sunny
48°F 9°C
Sunny
Mid-Afternoon
Lacy Weather - 2026-11-05 - Afternoon - Sunny
53°F 12°C
Sunny
Early-Evening
Lacy Weather - 2026-11-05 - Evening - Partly Cloudy
48°F 9°C
Partly Cloudy
Cool and brisk at 53°F 12°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and barometric pressure falling.

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Weather by the Numbers

Fri, 23rd
Lacy SD Weather - Friday, Oct 23, 2026 - Sunny
Hi: 85°F 29°C
Lo: 62°F 17°C
Sunrise 07:08 AM
Sunset 05:45 PM
Wind SSE 18 mph28 km/h
Dew Point 56°F13°C
uv Index 3
Barometric Pressure 29.65 in1004 mb
POP 2% *
Humidity 48%
Sat, 24th
Lacy SD Weather - Saturday, Oct 24, 2026 - Overcast
Hi: 70°F 21°C
Lo: 48°F 9°C
Sunrise 07:09 AM
Sunset 05:43 PM
Wind NNW 15 mph24 km/h
Dew Point 32°F-0°C
uv Index 2
Barometric Pressure 30.33 in1027 mb
POP 9% *
Humidity 44%
Sun, 25th
Lacy SD Weather - Sunday, Oct 25, 2026 - Patchy Rain Nearby
Hi: 48°F 9°C
Lo: 42°F 5°C
Sunrise 07:11 AM
Sunset 05:42 PM
Wind E 8 mph12 km/h
Dew Point 31°F-0°C
uv Index 0
Barometric Pressure 30.47 in1032 mb
POP 21% *
Humidity 55%
Mon, 26th
Lacy SD Weather - Monday, Oct 26, 2026 - Light Rain
Hi: 42°F 6°C
Lo: 37°F 3°C
Sunrise 07:12 AM
Sunset 05:40 PM
Wind NE 13 mph20 km/h
Dew Point 36°F2°C
uv Index 0
Barometric Pressure 30.39 in1029 mb
POP 74% *
Humidity 88%
Tue, 27th
Lacy SD Weather - Tuesday, Oct 27, 2026 - Partly Cloudy
Hi: 55°F 13°C
Lo: 38°F 3°C
Sunrise 07:13 AM
Sunset 05:39 PM
Wind SSE 5 mph8 km/h
Dew Point 36°F2°C
uv Index 2
Barometric Pressure 30.06 in1018 mb
POP 10% *
Humidity 71%
Wed, 28th
Lacy SD Weather - Wednesday, Oct 28, 2026 - Partly Cloudy
Hi: 57°F 14°C
Lo: 43°F 6°C
Sunrise 07:15 AM
Sunset 05:37 PM
Wind W 9 mph14 km/h
Dew Point 41°F5°C
uv Index 4
Barometric Pressure 30.09 in1019 mb
POP 8% *
Humidity 64%
Thu, 29th
Lacy SD Weather - Thursday, Oct 29, 2026 - Partly Cloudy
Hi: 60°F 15°C
Lo: 46°F 8°C
Sunrise 07:16 AM
Sunset 05:36 PM
Wind SSE 5 mph8 km/h
Dew Point 45°F7°C
uv Index 5
Barometric Pressure 29.97 in1015 mb
POP 6% *
Humidity 58%
Fri, 30th
Lacy SD Weather - Friday, Oct 30, 2026 - Partly Cloudy
Hi: 63°F 17°C
Lo: 46°F 8°C
Sunrise 07:17 AM
Sunset 05:34 PM
Wind SSE 10 mph15 km/h
Dew Point 51°F11°C
uv Index 5
Barometric Pressure 29.85 in1011 mb
POP 11% *
Humidity 69%
Sat, 31st
Lacy SD Weather - Saturday, Oct 31, 2026 - Moderate Rain At Times
Hi: 58°F 14°C
Lo: 49°F 9°C
Sunrise 07:19 AM
Sunset 05:33 PM
Wind NW 9 mph14 km/h
Dew Point 53°F11°C
uv Index 3
Barometric Pressure 29.65 in1004 mb
POP 76% *
Humidity 82%
Sun, 1st
Lacy SD Weather - Sunday, Nov 1, 2026 - Cloudy
Hi: 51°F 11°C
Lo: 45°F 7°C
Sunrise 07:20 AM
Sunset 05:31 PM
Wind NW 17 mph28 km/h
Dew Point 35°F1°C
uv Index 3
Barometric Pressure 30.03 in1017 mb
POP 11% *
Humidity 55%
Mon, 2nd
Lacy SD Weather - Monday, Nov 2, 2026 - Partly Cloudy
Hi: 53°F 12°C
Lo: 42°F 6°C
Sunrise 06:21 AM
Sunset 04:30 PM
Wind WNW 10 mph17 km/h
Dew Point 32°F0°C
uv Index 4
Barometric Pressure 30.15 in1021 mb
POP 3% *
Humidity 46%
Tue, 3rd
Lacy SD Weather - Tuesday, Nov 3, 2026 - Cloudy
Hi: 49°F 9°C
Lo: 38°F 3°C
Sunrise 06:22 AM
Sunset 04:28 PM
Wind SW 1 mph2 km/h
Dew Point 28°F-2°C
uv Index 2
Barometric Pressure 30.06 in1018 mb
POP 5% *
Humidity 46%
Wed, 4th
Lacy SD Weather - Wednesday, Nov 4, 2026 - Overcast
Hi: 51°F 11°C
Lo: 40°F 4°C
Sunrise 06:24 AM
Sunset 04:27 PM
Wind NW 6 mph9 km/h
Dew Point 33°F0°C
uv Index 3
Barometric Pressure 30.03 in1017 mb
POP 12% *
Humidity 50%
Thu, 5th
Lacy SD Weather - Thursday, Nov 5, 2026 - Partly Cloudy
Hi: 55°F 13°C
Lo: 40°F 5°C
Sunrise 06:25 AM
Sunset 04:26 PM
Wind S 3 mph5 km/h
Dew Point 36°F2°C
uv Index 4
Barometric Pressure 29.88 in1012 mb
POP 3% *
Humidity 51%
* POP = Probability of Precipitation. Data for 12:00 PM.