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Groton SD Weather - Clear - 69°F
Clear
69°F
Updated 3:31 pm
Feels Like 59°F
Humidity 34%
Wind NNW 13 mph
Barometer  30.06 in
Dew Point 40°F
Groton SD Weather - Clear - 21°C
Clear
21°C
Updated 3:31 pm
Feels Like 15°C
Humidity 34%
Wind NNW 21 km/h
Barometer  101.7 kPa
Dew Point 4°C
Groton, SD Weather and Current Conditionsgroton sd weather forecast

Groton, SD Weather Forecast

Groton South Dakota WeatherGroton, South Dakota Weather Weather Forecast
14 day API Groton, SD weather forecast. Note. Our 7-day weather forecast for Groton, South Dakota is our most reliable and accurate forecast. This model should only be used as a likely scenario. Forecasting more than 7 days is difficult.
Groton, SD Weather Forecast Dated: 331 PM Sat Sep 12 2026
Expect a mild stretch with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.

Saturday, September 12, 2026

Mid-Morning
Groton Weather - 2026-09-12 - Morning - Sunny
57°F 14°C
Sunny
Mid-Afternoon
Groton Weather - 2026-09-12 - Afternoon - Partly Cloudy
68°F 20°C
Partly Cloudy
Early-Evening
Groton Weather - 2026-09-12 - Evening - Overcast
67°F 20°C
Overcast
Pleasant near 68°F 20°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds turning from the WNW to the NNW at 9 mph 14 km/h.

Sunday, September 13, 2026

Mid-Morning
Groton Weather - 2026-09-13 - Morning - Overcast
55°F 13°C
Overcast
Mid-Afternoon
Groton Weather - 2026-09-13 - Afternoon - Overcast
69°F 21°C
Overcast
Early-Evening
Groton Weather - 2026-09-13 - Evening - Sunny
69°F 20°C
Sunny
Comfortable with temperatures reaching 69°F 21°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and barometric pressure falling. Winds switching from the NE to the ESE at 6 mph 9 km/h.

Monday, September 14, 2026

Mid-Morning
Groton Weather - 2026-09-14 - Morning - Scattered Showers
55°F 13°C
Scattered Showers
Mid-Afternoon
Groton Weather - 2026-09-14 - Afternoon - Light Showers
61°F 16°C
Light Showers
Early-Evening
Groton Weather - 2026-09-14 - Evening - Overcast
66°F 19°C
Overcast
Comfortable at 61°F 16°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds decreasing from SSE 19 mph 30 km/h to W 7 mph 12 km/h.

Tuesday, September 15, 2026

Mid-Morning
Groton Weather - 2026-09-15 - Morning - Sunny
52°F 11°C
Sunny
Mid-Afternoon
Groton Weather - 2026-09-15 - Afternoon - Overcast
70°F 21°C
Overcast
Early-Evening
Groton Weather - 2026-09-15 - Evening - Sunny
67°F 19°C
Sunny
Mild temperatures up to 70°F 21°C, sunny in the morning, overcast in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds swinging from the NW to the ENE at 6 mph 10 km/h.

Wednesday, September 16, 2026

Mid-Morning
Groton Weather - 2026-09-16 - Morning - Scattered Showers
57°F 14°C
Scattered Showers
Mid-Afternoon
Groton Weather - 2026-09-16 - Afternoon - Cloudy
71°F 21°C
Cloudy
Early-Evening
Groton Weather - 2026-09-16 - Evening - Scattered Showers
58°F 14°C
Scattered Showers
Mild with a high of 71°F 21°C, scattered downpours possible, with steady humidity and steady pressure. Winds shifting from the SE to the SSE at 9 mph 14 km/h.

Thursday, September 17, 2026

Mid-Morning
Groton Weather - 2026-09-17 - Morning - Light Fog
58°F 14°C
Light Fog
Mid-Afternoon
Groton Weather - 2026-09-17 - Afternoon - Sunny
71°F 22°C
Sunny
Early-Evening
Groton Weather - 2026-09-17 - Evening - Sunny
65°F 19°C
Sunny
Pleasant near 71°F 22°C, partly cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure.

Friday, September 18, 2026

Mid-Morning
Groton Weather - 2026-09-18 - Morning - Light Fog
50°F 10°C
Light Fog
Mid-Afternoon
Groton Weather - 2026-09-18 - Afternoon - Cloudy
65°F 18°C
Cloudy
Early-Evening
Groton Weather - 2026-09-18 - Evening - Sunny
66°F 19°C
Sunny
Comfortable at 65°F 18°C, cloudy in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure.

Saturday, September 19, 2026

Mid-Morning
Groton Weather - 2026-09-19 - Morning - Sunny
59°F 15°C
Sunny
Mid-Afternoon
Groton Weather - 2026-09-19 - Afternoon - Sunny
71°F 22°C
Sunny
Early-Evening
Groton Weather - 2026-09-19 - Evening - Sunny
70°F 21°C
Sunny
Enjoyable around 71°F 22°C, sunny throughout the day, with lower humidity and steady pressure.

Sunday, September 20, 2026

Mid-Morning
Groton Weather - 2026-09-20 - Morning - Sunny
60°F 15°C
Sunny
Mid-Afternoon
Groton Weather - 2026-09-20 - Afternoon - Sunny
73°F 23°C
Sunny
Early-Evening
Groton Weather - 2026-09-20 - Evening - Sunny
69°F 21°C
Sunny
Mild temperatures up to 73°F 23°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds S at 12 mph 20 km/h. Gusts up to 22 mph 36 km/h.

Monday, September 21, 2026

Mid-Morning
Groton Weather - 2026-09-21 - Morning - Sunny
61°F 16°C
Sunny
Mid-Afternoon
Groton Weather - 2026-09-21 - Afternoon - Overcast
80°F 26°C
Overcast
Early-Evening
Groton Weather - 2026-09-21 - Evening - Sunny
78°F 26°C
Sunny
Very warm with a high of 80°F 26°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds easing from S 19 mph 31 km/h to NNW 10 mph 17 km/h. Gusts up to 22 mph 34 km/h.

Tuesday, September 22, 2026

Mid-Morning
Groton Weather - 2026-09-22 - Morning - Overcast
65°F 18°C
Overcast
Mid-Afternoon
Groton Weather - 2026-09-22 - Afternoon - Sunny
81°F 27°C
Sunny
Early-Evening
Groton Weather - 2026-09-22 - Evening - Overcast
71°F 22°C
Overcast
Warm and summery near 81°F 27°C, overcast in the morning, becoming cloudy through the afternoon and evening, with lower humidity and steady pressure. Winds moving from the SSW to the NNW at 12 mph 19 km/h.

Wednesday, September 23, 2026

Mid-Morning
Groton Weather - 2026-09-23 - Morning - Overcast
57°F 14°C
Overcast
Mid-Afternoon
Groton Weather - 2026-09-23 - Afternoon - Overcast
64°F 18°C
Overcast
Early-Evening
Groton Weather - 2026-09-23 - Evening - Partly Cloudy
59°F 15°C
Partly Cloudy
Cool with a high near 64°F 18°C, partly cloudy in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds swinging from the NNW to the SE at 11 mph 18 km/h. Gusts up to 21 mph 34 km/h.

Thursday, September 24, 2026

Mid-Morning
Groton Weather - 2026-09-24 - Morning - Cloudy
50°F 10°C
Cloudy
Mid-Afternoon
Groton Weather - 2026-09-24 - Afternoon - Sunny
68°F 20°C
Sunny
Early-Evening
Groton Weather - 2026-09-24 - Evening - Sunny
64°F 18°C
Sunny
Enjoyable around 68°F 20°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and barometric pressure falling. Winds shifting from the SE to the SSE at 15 mph 23 km/h. Gusts up to 27 mph 44 km/h.

Friday, September 25, 2026

Mid-Morning
Groton Weather - 2026-09-25 - Morning - Overcast
54°F 12°C
Overcast
Mid-Afternoon
Groton Weather - 2026-09-25 - Afternoon - Cloudy
57°F 14°C
Cloudy
Early-Evening
Groton Weather - 2026-09-25 - Evening - Cloudy
54°F 12°C
Cloudy
Cool and brisk at 57°F 14°C, cloudy through the afternoon, turning overcast this evening, with lower humidity and barometric pressure rising. Winds turning from the NW to the S at 11 mph 17 km/h.

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Weather by the Numbers

Sat, 12th
Groton SD Weather - Saturday, Sep 12, 2026 - Sunny
Hi: 69°F 21°C
Lo: 53°F 12°C
Sunrise 07:07 AM
Sunset 07:48 PM
Wind NW 12 mph19 km/h
Dew Point 44°F7°C
uv Index 4
Barometric Pressure 30.03 in1017 mb
POP 2% *
Humidity 49%
Sun, 13th
Groton SD Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 71°F 21°C
Lo: 52°F 11°C
Sunrise 07:08 AM
Sunset 07:47 PM
Wind NNE 8 mph12 km/h
Dew Point 33°F0°C
uv Index 1
Barometric Pressure 30.18 in1022 mb
POP 10% *
Humidity 32%
Mon, 14th
Groton SD Weather - Monday, Sep 14, 2026 - Light Rain Shower
Hi: 70°F 21°C
Lo: 55°F 13°C
Sunrise 07:09 AM
Sunset 07:45 PM
Wind S 19 mph31 km/h
Dew Point 55°F13°C
uv Index 1
Barometric Pressure 29.74 in1007 mb
POP 47% *
Humidity 86%
Tue, 15th
Groton SD Weather - Tuesday, Sep 15, 2026 - Partly Cloudy
Hi: 73°F 23°C
Lo: 52°F 11°C
Sunrise 07:10 AM
Sunset 07:43 PM
Wind NW 9 mph14 km/h
Dew Point 36°F2°C
uv Index 5
Barometric Pressure 30.12 in1020 mb
POP 5% *
Humidity 37%
Wed, 16th
Groton SD Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 71°F 21°C
Lo: 53°F 12°C
Sunrise 07:12 AM
Sunset 07:41 PM
Wind SSE 11 mph17 km/h
Dew Point 41°F5°C
uv Index 5
Barometric Pressure 30.24 in1024 mb
POP 1% *
Humidity 39%
Thu, 17th
Groton SD Weather - Thursday, Sep 17, 2026 - Sunny
Hi: 75°F 24°C
Lo: 47°F 8°C
Sunrise 07:13 AM
Sunset 07:39 PM
Wind SE 4 mph6 km/h
Dew Point 50°F10°C
uv Index 5
Barometric Pressure 30.24 in1024 mb
POP 4% *
Humidity 61%
Fri, 18th
Groton SD Weather - Friday, Sep 18, 2026 - Partly Cloudy
Hi: 68°F 20°C
Lo: 46°F 8°C
Sunrise 07:14 AM
Sunset 07:37 PM
Wind WSW 5 mph8 km/h
Dew Point 47°F8°C
uv Index 4
Barometric Pressure 30.21 in1023 mb
POP 11% *
Humidity 66%
Sat, 19th
Groton SD Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 73°F 23°C
Lo: 56°F 13°C
Sunrise 07:15 AM
Sunset 07:35 PM
Wind NNE 4 mph7 km/h
Dew Point 42°F5°C
uv Index 5
Barometric Pressure 30.21 in1023 mb
POP 1% *
Humidity 42%
Sun, 20th
Groton SD Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 74°F 23°C
Lo: 56°F 13°C
Sunrise 07:17 AM
Sunset 07:33 PM
Wind S 11 mph18 km/h
Dew Point 45°F7°C
uv Index 6
Barometric Pressure 30.12 in1020 mb
POP 1% *
Humidity 44%
Mon, 21st
Groton SD Weather - Monday, Sep 21, 2026 - Sunny
Hi: 82°F 28°C
Lo: 58°F 14°C
Sunrise 07:18 AM
Sunset 07:31 PM
Wind SSW 18 mph28 km/h
Dew Point 47°F8°C
uv Index 6
Barometric Pressure 29.83 in1010 mb
POP 6% *
Humidity 43%
Tue, 22nd
Groton SD Weather - Tuesday, Sep 22, 2026 - Cloudy
Hi: 81°F 27°C
Lo: 61°F 16°C
Sunrise 07:19 AM
Sunset 07:29 PM
Wind SW 17 mph28 km/h
Dew Point 36°F2°C
uv Index 5
Barometric Pressure 29.74 in1007 mb
POP 2% *
Humidity 25%
Wed, 23rd
Groton SD Weather - Wednesday, Sep 23, 2026 - Sunny
Hi: 64°F 18°C
Lo: 53°F 12°C
Sunrise 07:20 AM
Sunset 07:27 PM
Wind NNW 17 mph27 km/h
Dew Point 29°F-2°C
uv Index 5
Barometric Pressure 30.12 in1020 mb
POP 6% *
Humidity 30%
Thu, 24th
Groton SD Weather - Thursday, Sep 24, 2026 - Sunny
Hi: 69°F 21°C
Lo: 47°F 8°C
Sunrise 07:22 AM
Sunset 07:25 PM
Wind SSE 13 mph20 km/h
Dew Point 28°F-2°C
uv Index 5
Barometric Pressure 30.06 in1018 mb
POP 1% *
Humidity 30%
Fri, 25th
Groton SD Weather - Friday, Sep 25, 2026 - Cloudy
Hi: 61°F 16°C
Lo: 51°F 10°C
Sunrise 07:23 AM
Sunset 07:23 PM
Wind SE 22 mph35 km/h
Dew Point 35°F2°C
uv Index 3
Barometric Pressure 30.03 in1017 mb
POP 7% *
Humidity 47%
* POP = Probability of Precipitation. Data for 12:00 PM.