Grass Lake, SD 14 Day Weather

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Grass Lake, SD Weather - 14-Day Weather Forecast

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Grass Lake SD Weather - Mostly Clear - 78°F
Mostly Clear
78°F
Updated 1:51 pm
Feels Like 82°F
Humidity 45%
Wind SSW 18 mph
Barometer  29.98 in
Dew Point 55°F
Grass Lake SD Weather - Mostly Clear - 26°C
Mostly Clear
26°C
Updated 1:51 pm
Feels Like 28°C
Humidity 45%
Wind SSW 29 km/h
Barometer  101.5 kPa
Dew Point 13°C
Grass Lake, SD Weather and Current Conditionsgrass lake sd weather forecast

Grass Lake, SD Weather Forecast

Grass Lake South Dakota WeatherGrass Lake, South Dakota Weather Weather Forecast
14 day API Grass Lake weather forecast. Note. Our 7-day Grass Lake weather forecast is our most reliable and accurate forecast. This model should only be used as a likely scenario. Forecasting more than 7 days is difficult.
Grass Lake, SD Weather Forecast Dated: 151 PM Thu Sep 10 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.

Thursday, September 10, 2026

Mid-Morning
Grass Lake Weather - 2026-09-10 - Morning - Sunny
63°F 17°C
Sunny
Mid-Afternoon
Grass Lake Weather - 2026-09-10 - Afternoon - Sunny
84°F 29°C
Sunny
Early-Evening
Grass Lake Weather - 2026-09-10 - Evening - Sunny
77°F 25°C
Sunny
Warm and summery near 84°F 29°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds turning from the S to the SSE at 15 mph 24 km/h. Gusts up to 26 mph 42 km/h.

Friday, September 11, 2026

Mid-Morning
Grass Lake Weather - 2026-09-11 - Morning - Cloudy
67°F 20°C
Cloudy
Mid-Afternoon
Grass Lake Weather - 2026-09-11 - Afternoon - Overcast
95°F 35°C
Overcast
Early-Evening
Grass Lake Weather - 2026-09-11 - Evening - Overcast
79°F 27°C
Overcast
Hot and sweltering around 95°F 35°C, overcast through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds switching from the S to the N at 21 mph 34 km/h. Gusts up to 31 mph 50 km/h.

Saturday, September 12, 2026

Mid-Morning
Grass Lake Weather - 2026-09-12 - Morning - Partly Cloudy
55°F 13°C
Partly Cloudy
Mid-Afternoon
Grass Lake Weather - 2026-09-12 - Afternoon - Scattered Showers
65°F 18°C
Scattered Showers
Early-Evening
Grass Lake Weather - 2026-09-12 - Evening - Scattered Showers
62°F 17°C
Scattered Showers
Comfortable at 65°F 18°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the N to the NNW at 6 mph 10 km/h.

Sunday, September 13, 2026

Mid-Morning
Grass Lake Weather - 2026-09-13 - Morning - Overcast
54°F 12°C
Overcast
Mid-Afternoon
Grass Lake Weather - 2026-09-13 - Afternoon - Scattered Showers
53°F 12°C
Scattered Showers
Early-Evening
Grass Lake Weather - 2026-09-13 - Evening - Scattered Showers
56°F 13°C
Scattered Showers
Crisp with a high near 53°F 12°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure. Winds swinging from the ENE to the E at 17 mph 27 km/h. Gusts up to 34 mph 55 km/h.

Monday, September 14, 2026

Mid-Morning
Grass Lake Weather - 2026-09-14 - Morning - Fog
57°F 14°C
Fog
Mid-Afternoon
Grass Lake Weather - 2026-09-14 - Afternoon - Scattered Showers
59°F 15°C
Scattered Showers
Early-Evening
Grass Lake Weather - 2026-09-14 - Evening - Sunny
62°F 17°C
Sunny
Refreshing around 59°F 15°C, scattered downpours possible, with lower humidity and barometric pressure rising. Winds shifting from the WSW to the W at 10 mph 16 km/h.

Tuesday, September 15, 2026

Mid-Morning
Grass Lake Weather - 2026-09-15 - Morning - Sunny
50°F 10°C
Sunny
Mid-Afternoon
Grass Lake Weather - 2026-09-15 - Afternoon - Sunny
62°F 17°C
Sunny
Early-Evening
Grass Lake Weather - 2026-09-15 - Evening - Partly Cloudy
60°F 15°C
Partly Cloudy
Mildly cool near 62°F 17°C, cloudy in the morning, partly cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds turning from the NNW to the SE at 5 mph 7 km/h.

Wednesday, September 16, 2026

Mid-Morning
Grass Lake Weather - 2026-09-16 - Morning - Overcast
54°F 12°C
Overcast
Mid-Afternoon
Grass Lake Weather - 2026-09-16 - Afternoon - Sunny
66°F 19°C
Sunny
Early-Evening
Grass Lake Weather - 2026-09-16 - Evening - Overcast
64°F 18°C
Overcast
Comfortable at 66°F 19°C, cloudy through the afternoon, turning overcast this evening, with lower humidity and steady pressure.

Thursday, September 17, 2026

Mid-Morning
Grass Lake Weather - 2026-09-17 - Morning - Overcast
40°F 5°C
Overcast
Mid-Afternoon
Grass Lake Weather - 2026-09-17 - Afternoon - Sunny
65°F 18°C
Sunny
Early-Evening
Grass Lake Weather - 2026-09-17 - Evening - Sunny
70°F 21°C
Sunny
Cool with a high near 65°F 18°C, cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with lower humidity and barometric pressure falling. Winds easing from ESE 19 mph 30 km/h to E 7 mph 11 km/h.

Friday, September 18, 2026

Mid-Morning
Grass Lake Weather - 2026-09-18 - Morning - Sunny
47°F 8°C
Sunny
Mid-Afternoon
Grass Lake Weather - 2026-09-18 - Afternoon - Sunny
61°F 16°C
Sunny
Early-Evening
Grass Lake Weather - 2026-09-18 - Evening - Sunny
62°F 17°C
Sunny
Refreshing around 61°F 16°C, sunny throughout the day, with steady humidity and barometric pressure falling.

Saturday, September 19, 2026

Mid-Morning
Grass Lake Weather - 2026-09-19 - Morning - Sunny
54°F 12°C
Sunny
Mid-Afternoon
Grass Lake Weather - 2026-09-19 - Afternoon - Sunny
68°F 20°C
Sunny
Early-Evening
Grass Lake Weather - 2026-09-19 - Evening - Sunny
68°F 20°C
Sunny
Mild with a high of 68°F 20°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling. Winds moving from the SSE to the SE at 9 mph 15 km/h.

Sunday, September 20, 2026

Mid-Morning
Grass Lake Weather - 2026-09-20 - Morning - Partly Cloudy
60°F 16°C
Partly Cloudy
Mid-Afternoon
Grass Lake Weather - 2026-09-20 - Afternoon - Sunny
74°F 24°C
Sunny
Early-Evening
Grass Lake Weather - 2026-09-20 - Evening - Scattered Showers
71°F 22°C
Scattered Showers
Pleasant near 74°F 24°C, scattered downpours possible, with increasing humidity and barometric pressure falling. Winds S at 22 mph 35 km/h. Gusts up to 35 mph 55 km/h.

Monday, September 21, 2026

Mid-Morning
Grass Lake Weather - 2026-09-21 - Morning - Scattered Showers
64°F 18°C
Scattered Showers
Mid-Afternoon
Grass Lake Weather - 2026-09-21 - Afternoon - Overcast
69°F 20°C
Overcast
Early-Evening
Grass Lake Weather - 2026-09-21 - Evening - Overcast
69°F 21°C
Overcast
Comfortable with temperatures reaching 69°F 20°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds out of the WNW at 19 mph 30 km/h. Gusts up to 24 mph 39 km/h.

Tuesday, September 22, 2026

Mid-Morning
Grass Lake Weather - 2026-09-22 - Morning - Overcast
49°F 9°C
Overcast
Mid-Afternoon
Grass Lake Weather - 2026-09-22 - Afternoon - Overcast
53°F 12°C
Overcast
Early-Evening
Grass Lake Weather - 2026-09-22 - Evening - Sunny
52°F 11°C
Sunny
Brisk around 53°F 12°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and barometric pressure rising. Winds turning from the NW to the SE at 12 mph 20 km/h. Gusts up to 20 mph 33 km/h.

Wednesday, September 23, 2026

Mid-Morning
Grass Lake Weather - 2026-09-23 - Morning - Sunny
46°F 8°C
Sunny
Mid-Afternoon
Grass Lake Weather - 2026-09-23 - Afternoon - Sunny
62°F 17°C
Sunny
Early-Evening
Grass Lake Weather - 2026-09-23 - Evening - Sunny
61°F 17°C
Sunny
Mildly cool near 62°F 17°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds switching from the NNE to the SE at 8 mph 13 km/h.

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Weather by the Numbers

Thu, 10th
Grass Lake SD Weather - Thursday, Sep 10, 2026 - Sunny
Hi: 84°F 29°C
Lo: 53°F 12°C
Sunrise 07:02 AM
Sunset 07:49 PM
Wind SSW 15 mph23 km/h
Dew Point 56°F13°C
uv Index 5
Barometric Pressure 29.94 in1014 mb
POP 1% *
Humidity 45%
Fri, 11th
Grass Lake SD Weather - Friday, Sep 11, 2026 - Overcast
Hi: 95°F 35°C
Lo: 66°F 19°C
Sunrise 07:03 AM
Sunset 07:48 PM
Wind SSW 20 mph33 km/h
Dew Point 53°F12°C
uv Index 5
Barometric Pressure 29.59 in1002 mb
POP 9% *
Humidity 39%
Sat, 12th
Grass Lake SD Weather - Saturday, Sep 12, 2026 - Overcast
Hi: 67°F 19°C
Lo: 52°F 11°C
Sunrise 07:04 AM
Sunset 07:46 PM
Wind N 10 mph17 km/h
Dew Point 35°F2°C
uv Index 4
Barometric Pressure 30 in1016 mb
POP 10% *
Humidity 32%
Sun, 13th
Grass Lake SD Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 62°F 17°C
Lo: 50°F 10°C
Sunrise 07:06 AM
Sunset 07:44 PM
Wind E 17 mph28 km/h
Dew Point 32°F-0°C
uv Index 2
Barometric Pressure 30 in1016 mb
POP 10% *
Humidity 36%
Mon, 14th
Grass Lake SD Weather - Monday, Sep 14, 2026 - Fog
Hi: 65°F 18°C
Lo: 47°F 8°C
Sunrise 07:07 AM
Sunset 07:42 PM
Wind SSW 7 mph11 km/h
Dew Point 57°F14°C
uv Index 3
Barometric Pressure 29.77 in1008 mb
POP 44% *
Humidity 98%
Tue, 15th
Grass Lake SD Weather - Tuesday, Sep 15, 2026 - Overcast
Hi: 63°F 17°C
Lo: 49°F 10°C
Sunrise 07:08 AM
Sunset 07:40 PM
Wind NNW 10 mph17 km/h
Dew Point 35°F1°C
uv Index 3
Barometric Pressure 30.21 in1023 mb
POP 3% *
Humidity 45%
Wed, 16th
Grass Lake SD Weather - Wednesday, Sep 16, 2026 - Cloudy
Hi: 67°F 19°C
Lo: 54°F 12°C
Sunrise 07:09 AM
Sunset 07:38 PM
Wind SSE 6 mph10 km/h
Dew Point 40°F4°C
uv Index 4
Barometric Pressure 30.27 in1025 mb
POP 4% *
Humidity 47%
Thu, 17th
Grass Lake SD Weather - Thursday, Sep 17, 2026 - Partly Cloudy
Hi: 72°F 22°C
Lo: 40°F 5°C
Sunrise 07:10 AM
Sunset 07:36 PM
Wind N 16 mph26 km/h
Dew Point 29°F-2°C
uv Index 3
Barometric Pressure 30.42 in1030 mb
POP 3% *
Humidity 52%
Fri, 18th
Grass Lake SD Weather - Friday, Sep 18, 2026 - Sunny
Hi: 66°F 19°C
Lo: 45°F 7°C
Sunrise 07:12 AM
Sunset 07:34 PM
Wind SW 6 mph10 km/h
Dew Point 27°F-3°C
uv Index 4
Barometric Pressure 30.33 in1027 mb
POP 1% *
Humidity 34%
Sat, 19th
Grass Lake SD Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 70°F 21°C
Lo: 51°F 11°C
Sunrise 07:13 AM
Sunset 07:32 PM
Wind SSE 6 mph10 km/h
Dew Point 33°F1°C
uv Index 5
Barometric Pressure 30.15 in1021 mb
POP 1% *
Humidity 34%
Sun, 20th
Grass Lake SD Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 75°F 24°C
Lo: 58°F 14°C
Sunrise 07:14 AM
Sunset 07:30 PM
Wind S 21 mph34 km/h
Dew Point 43°F6°C
uv Index 6
Barometric Pressure 29.77 in1008 mb
POP 1% *
Humidity 40%
Mon, 21st
Grass Lake SD Weather - Monday, Sep 21, 2026 - Overcast
Hi: 71°F 22°C
Lo: 61°F 16°C
Sunrise 07:15 AM
Sunset 07:28 PM
Wind WNW 15 mph24 km/h
Dew Point 45°F7°C
uv Index 4
Barometric Pressure 29.8 in1009 mb
POP 12% *
Humidity 51%
Tue, 22nd
Grass Lake SD Weather - Tuesday, Sep 22, 2026 - Overcast
Hi: 61°F 16°C
Lo: 48°F 9°C
Sunrise 07:16 AM
Sunset 07:27 PM
Wind NNW 19 mph31 km/h
Dew Point 38°F3°C
uv Index 2
Barometric Pressure 30.15 in1021 mb
POP 16% *
Humidity 64%
Wed, 23rd
Grass Lake SD Weather - Wednesday, Sep 23, 2026 - Sunny
Hi: 65°F 18°C
Lo: 45°F 7°C
Sunrise 07:18 AM
Sunset 07:25 PM
Wind ENE 4 mph7 km/h
Dew Point 33°F0°C
uv Index 4
Barometric Pressure 30.3 in1026 mb
POP 1% *
Humidity 44%
* POP = Probability of Precipitation. Data for 12:00 PM.