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Gretna SD Weather - Overcast - 61°F
Overcast
61°F
Updated 8:12 pm
Feels Like 54°F
Humidity 89%
Wind ENE 7 mph
Barometer  30.09 in
Dew Point 58°F
Gretna SD Weather - Overcast - 16°C
Overcast
16°C
Updated 8:12 pm
Feels Like 12°C
Humidity 89%
Wind ENE 11 km/h
Barometer  101.8 kPa
Dew Point 14°C
Gretna, SD Weather and Current Conditionsgretna sd weather forecast

Gretna, SD Weather Forecast

Gretna South Dakota WeatherGretna, South Dakota Weather Weather Forecast
14 day API Gretna, SD weather forecast. Note. Our 7-day weather forecast for Gretna, 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.
Gretna, SD Weather Forecast Dated: 812 PM Sat Sep 19 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and a stable pattern will dominate.

Saturday, September 19, 2026

Mid-Morning
Gretna Weather - 2026-09-19 - Morning - Light Fog
53°F 11°C
Light Fog
Mid-Afternoon
Gretna Weather - 2026-09-19 - Afternoon - Scattered Showers
59°F 15°C
Scattered Showers
Early-Evening
Gretna Weather - 2026-09-19 - Evening - Scattered Showers
59°F 15°C
Scattered Showers
Refreshing around 59°F 15°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds turning from the ENE to the NE at 8 mph 13 km/h.

Sunday, September 20, 2026

Mid-Morning
Gretna Weather - 2026-09-20 - Morning - Overcast
51°F 10°C
Overcast
Mid-Afternoon
Gretna Weather - 2026-09-20 - Afternoon - Scattered Showers
59°F 15°C
Scattered Showers
Early-Evening
Gretna Weather - 2026-09-20 - Evening - Light Rain
54°F 12°C
Light Rain
Mildly cool near 59°F 15°C, scattered downpours possible, with steady humidity and steady pressure. Winds switching from the ENE to the ESE at 9 mph 14 km/h.

Monday, September 21, 2026

Mid-Morning
Gretna Weather - 2026-09-21 - Morning - Overcast
49°F 9°C
Overcast
Mid-Afternoon
Gretna Weather - 2026-09-21 - Afternoon - Scattered Showers
58°F 15°C
Scattered Showers
Early-Evening
Gretna Weather - 2026-09-21 - Evening - Partly Cloudy
54°F 13°C
Partly Cloudy
Comfortable at 58°F 15°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds moving from the E to the SSE at 10 mph 15 km/h.

Tuesday, September 22, 2026

Mid-Morning
Gretna Weather - 2026-09-22 - Morning - Partly Cloudy
47°F 8°C
Partly Cloudy
Mid-Afternoon
Gretna Weather - 2026-09-22 - Afternoon - Cloudy
61°F 16°C
Cloudy
Early-Evening
Gretna Weather - 2026-09-22 - Evening - Overcast
56°F 14°C
Overcast
Cool with a high near 61°F 16°C, partly cloudy in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds out of the SE at 16 mph 26 km/h. Gusts up to 21 mph 33 km/h.

Wednesday, September 23, 2026

Mid-Morning
Gretna Weather - 2026-09-23 - Morning - Partly Cloudy
52°F 11°C
Partly Cloudy
Mid-Afternoon
Gretna Weather - 2026-09-23 - Afternoon - Overcast
65°F 18°C
Overcast
Early-Evening
Gretna Weather - 2026-09-23 - Evening - Overcast
61°F 17°C
Overcast
Refreshing around 65°F 18°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and steady pressure. Winds blowing from the SSE at 21 mph 33 km/h. Gusts up to 31 mph 49 km/h.

Thursday, September 24, 2026

Mid-Morning
Gretna Weather - 2026-09-24 - Morning - Scattered Showers
57°F 14°C
Scattered Showers
Mid-Afternoon
Gretna Weather - 2026-09-24 - Afternoon - Overcast
59°F 15°C
Overcast
Early-Evening
Gretna Weather - 2026-09-24 - Evening - Overcast
57°F 14°C
Overcast
Mildly cool near 59°F 15°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds turning from the SSE to the SE at 10 mph 16 km/h.

Friday, September 25, 2026

Mid-Morning
Gretna Weather - 2026-09-25 - Morning - Overcast
54°F 12°C
Overcast
Mid-Afternoon
Gretna Weather - 2026-09-25 - Afternoon - Overcast
60°F 16°C
Overcast
Early-Evening
Gretna Weather - 2026-09-25 - Evening - Scattered Showers
57°F 14°C
Scattered Showers
Comfortable at 60°F 16°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds out of the SE at 11 mph 17 km/h.

Saturday, September 26, 2026

Mid-Morning
Gretna Weather - 2026-09-26 - Morning - Overcast
58°F 15°C
Overcast
Mid-Afternoon
Gretna Weather - 2026-09-26 - Afternoon - Cloudy
69°F 21°C
Cloudy
Early-Evening
Gretna Weather - 2026-09-26 - Evening - Sunny
71°F 21°C
Sunny
Enjoyable around 69°F 21°C, cloudy in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and steady pressure. Winds moving from the S to the ENE at 5 mph 7 km/h.

Sunday, September 27, 2026

Mid-Morning
Gretna Weather - 2026-09-27 - Morning - Sunny
53°F 12°C
Sunny
Mid-Afternoon
Gretna Weather - 2026-09-27 - Afternoon - Partly Cloudy
65°F 19°C
Partly Cloudy
Early-Evening
Gretna Weather - 2026-09-27 - Evening - Overcast
50°F 10°C
Overcast
Refreshing around 65°F 19°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and barometric pressure rising. Winds decreasing from SSE 20 mph 32 km/h to NNE 9 mph 15 km/h.

Monday, September 28, 2026

Mid-Morning
Gretna Weather - 2026-09-28 - Morning - Sunny
48°F 9°C
Sunny
Mid-Afternoon
Gretna Weather - 2026-09-28 - Afternoon - Sunny
57°F 14°C
Sunny
Early-Evening
Gretna Weather - 2026-09-28 - Evening - Sunny
59°F 15°C
Sunny
Cool and brisk at 57°F 14°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds shifting from the ENE to the ESE at 8 mph 13 km/h.

Tuesday, September 29, 2026

Mid-Morning
Gretna Weather - 2026-09-29 - Morning - Sunny
49°F 10°C
Sunny
Mid-Afternoon
Gretna Weather - 2026-09-29 - Afternoon - Sunny
60°F 15°C
Sunny
Early-Evening
Gretna Weather - 2026-09-29 - Evening - Sunny
60°F 15°C
Sunny
Comfortable at 60°F 15°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds blowing from the SE at 16 mph 26 km/h. Gusts up to 27 mph 44 km/h.

Wednesday, September 30, 2026

Mid-Morning
Gretna Weather - 2026-09-30 - Morning - Sunny
55°F 13°C
Sunny
Mid-Afternoon
Gretna Weather - 2026-09-30 - Afternoon - Cloudy
62°F 17°C
Cloudy
Early-Evening
Gretna Weather - 2026-09-30 - Evening - Overcast
59°F 15°C
Overcast
Cool with a high near 62°F 17°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds SE at 19 mph 31 km/h. Gusts up to 27 mph 44 km/h.

Thursday, October 1, 2026

Mid-Morning
Gretna Weather - 2026-10-01 - Morning - Partly Cloudy
48°F 9°C
Partly Cloudy
Mid-Afternoon
Gretna Weather - 2026-10-01 - Afternoon - Sunny
60°F 16°C
Sunny
Early-Evening
Gretna Weather - 2026-10-01 - Evening - Sunny
61°F 16°C
Sunny
Refreshing around 60°F 16°C, sunny throughout the day, with lower humidity and steady pressure. Winds moving from the SE to the ESE at 11 mph 18 km/h. Gusts up to 22 mph 35 km/h.

Friday, October 2, 2026

Mid-Morning
Gretna Weather - 2026-10-02 - Morning - Sunny
53°F 11°C
Sunny
Mid-Afternoon
Gretna Weather - 2026-10-02 - Afternoon - Sunny
61°F 16°C
Sunny
Early-Evening
Gretna Weather - 2026-10-02 - Evening - Partly Cloudy
63°F 17°C
Partly Cloudy
Mildly cool near 61°F 16°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds swinging from the E to the ESE at 8 mph 14 km/h.

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Weather by the Numbers

Sat, 19th
Gretna SD Weather - Saturday, Sep 19, 2026 - Patchy Rain Nearby
Hi: 64°F 18°C
Lo: 51°F 11°C
Sunrise 07:22 AM
Sunset 07:42 PM
Wind ENE 9 mph15 km/h
Dew Point 51°F11°C
uv Index 1
Barometric Pressure 30.03 in1017 mb
POP 31% *
Humidity 92%
Sun, 20th
Gretna SD Weather - Sunday, Sep 20, 2026 - Patchy Rain Nearby
Hi: 60°F 16°C
Lo: 50°F 10°C
Sunrise 07:24 AM
Sunset 07:40 PM
Wind E 14 mph23 km/h
Dew Point 48°F9°C
uv Index 3
Barometric Pressure 30.12 in1020 mb
POP 20% *
Humidity 72%
Mon, 21st
Gretna SD Weather - Monday, Sep 21, 2026 - Cloudy
Hi: 59°F 15°C
Lo: 48°F 9°C
Sunrise 07:25 AM
Sunset 07:38 PM
Wind ESE 9 mph15 km/h
Dew Point 46°F8°C
uv Index 3
Barometric Pressure 30.21 in1023 mb
POP 15% *
Humidity 76%
Tue, 22nd
Gretna SD Weather - Tuesday, Sep 22, 2026 - Sunny
Hi: 61°F 16°C
Lo: 47°F 8°C
Sunrise 07:26 AM
Sunset 07:36 PM
Wind SSE 14 mph23 km/h
Dew Point 44°F7°C
uv Index 4
Barometric Pressure 30.21 in1023 mb
POP 5% *
Humidity 60%
Wed, 23rd
Gretna SD Weather - Wednesday, Sep 23, 2026 - Cloudy
Hi: 65°F 18°C
Lo: 50°F 10°C
Sunrise 07:27 AM
Sunset 07:34 PM
Wind SSE 21 mph33 km/h
Dew Point 49°F9°C
uv Index 4
Barometric Pressure 30.12 in1020 mb
POP 13% *
Humidity 65%
Thu, 24th
Gretna SD Weather - Thursday, Sep 24, 2026 - Patchy Rain Nearby
Hi: 60°F 15°C
Lo: 53°F 11°C
Sunrise 07:29 AM
Sunset 07:32 PM
Wind SSE 15 mph25 km/h
Dew Point 53°F12°C
uv Index 3
Barometric Pressure 30.06 in1018 mb
POP 26% *
Humidity 84%
Fri, 25th
Gretna SD Weather - Friday, Sep 25, 2026 - Overcast
Hi: 61°F 16°C
Lo: 51°F 11°C
Sunrise 07:30 AM
Sunset 07:30 PM
Wind SE 9 mph15 km/h
Dew Point 50°F10°C
uv Index 3
Barometric Pressure 30.15 in1021 mb
POP 22% *
Humidity 78%
Sat, 26th
Gretna SD Weather - Saturday, Sep 26, 2026 - Cloudy
Hi: 72°F 22°C
Lo: 53°F 12°C
Sunrise 07:31 AM
Sunset 07:28 PM
Wind WNW 6 mph10 km/h
Dew Point 54°F12°C
uv Index 4
Barometric Pressure 29.97 in1015 mb
POP 13% *
Humidity 72%
Sun, 27th
Gretna SD Weather - Sunday, Sep 27, 2026 - Cloudy
Hi: 66°F 19°C
Lo: 45°F 7°C
Sunrise 07:32 AM
Sunset 07:27 PM
Wind SSE 20 mph32 km/h
Dew Point 48°F9°C
uv Index 4
Barometric Pressure 29.85 in1011 mb
POP 9% *
Humidity 63%
Mon, 28th
Gretna SD Weather - Monday, Sep 28, 2026 - Sunny
Hi: 61°F 16°C
Lo: 47°F 8°C
Sunrise 07:34 AM
Sunset 07:25 PM
Wind E 9 mph14 km/h
Dew Point 32°F0°C
uv Index 4
Barometric Pressure 30.24 in1024 mb
POP 1% *
Humidity 47%
Tue, 29th
Gretna SD Weather - Tuesday, Sep 29, 2026 - Sunny
Hi: 61°F 16°C
Lo: 49°F 9°C
Sunrise 07:35 AM
Sunset 07:23 PM
Wind SE 15 mph24 km/h
Dew Point 37°F3°C
uv Index 4
Barometric Pressure 30.15 in1021 mb
POP 2% *
Humidity 51%
Wed, 30th
Gretna SD Weather - Wednesday, Sep 30, 2026 - Overcast
Hi: 63°F 17°C
Lo: 53°F 11°C
Sunrise 07:36 AM
Sunset 07:21 PM
Wind SE 19 mph31 km/h
Dew Point 45°F7°C
uv Index 4
Barometric Pressure 30.03 in1017 mb
POP 12% *
Humidity 58%
Thu, 1st
Gretna SD Weather - Thursday, Oct 1, 2026 - Sunny
Hi: 62°F 17°C
Lo: 47°F 9°C
Sunrise 07:37 AM
Sunset 07:19 PM
Wind SE 17 mph27 km/h
Dew Point 40°F5°C
uv Index 4
Barometric Pressure 30.15 in1021 mb
POP 3% *
Humidity 58%
Fri, 2nd
Gretna SD Weather - Friday, Oct 2, 2026 - Partly Cloudy
Hi: 63°F 17°C
Lo: 52°F 11°C
Sunrise 07:39 AM
Sunset 07:17 PM
Wind ESE 13 mph22 km/h
Dew Point 40°F4°C
uv Index 4
Barometric Pressure 30.42 in1030 mb
POP 3% *
Humidity 52%
* POP = Probability of Precipitation. Data for 12:00 PM.