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Eureka SD Weather - Clear - 70°F
Clear
70°F
Updated 2:12 am
Feels Like 64°F
Humidity 78%
Wind SE 16 mph
Barometer  29.87 in
Dew Point 63°F
Eureka SD Weather - Clear - 21°C
Clear
21°C
Updated 2:12 am
Feels Like 18°C
Humidity 78%
Wind SE 26 km/h
Barometer  101.2 kPa
Dew Point 17°C
Eureka, SD Weather and Current Conditionseureka sd weather forecast

Eureka, SD Weather Forecast

Eureka South Dakota WeatherEureka, South Dakota Weather Weather Forecast
14 Day API Eureka, SD Weather Forecast. Note: Our 7 day Eureka, South Dakota weather forecast is our most reliable, and specific forecast. This model should only be used as a probable scenario. Forecasting more than 7 days ahead is challenging.
Eureka, SD Weather Forecast Dated: 212 AM Mon Sep 07 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.

Monday, September 7, 2026

Mid-Morning
Eureka Weather - 2026-09-07 - Morning - Overcast
68°F 20°C
Overcast
Mid-Afternoon
Eureka Weather - 2026-09-07 - Afternoon - Overcast
81°F 27°C
Overcast
Early-Evening
Eureka Weather - 2026-09-07 - Evening - Overcast
86°F 30°C
Overcast
Warm and summery near 81°F 27°C, overcast throughout the day, with lower humidity and barometric pressure falling. Winds out of the S at 17 mph 27 km/h. Gusts up to 24 mph 39 km/h.

Tuesday, September 8, 2026

Mid-Morning
Eureka Weather - 2026-09-08 - Morning - Sunny
67°F 19°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-08 - Afternoon - Sunny
80°F 27°C
Sunny
Early-Evening
Eureka Weather - 2026-09-08 - Evening - Sunny
77°F 25°C
Sunny
Balmy with temperatures reaching 80°F 27°C, sunny throughout the day, with lower humidity and steady pressure. Winds blowing from the W at 19 mph 31 km/h. Gusts up to 21 mph 34 km/h.

Wednesday, September 9, 2026

Mid-Morning
Eureka Weather - 2026-09-09 - Morning - Sunny
57°F 14°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-09 - Afternoon - Sunny
73°F 23°C
Sunny
Early-Evening
Eureka Weather - 2026-09-09 - Evening - Sunny
72°F 22°C
Sunny
Enjoyable around 73°F 23°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and barometric pressure falling. Winds moving from the WNW to the NE at 10 mph 17 km/h.

Thursday, September 10, 2026

Mid-Morning
Eureka Weather - 2026-09-10 - Morning - Sunny
61°F 16°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-10 - Afternoon - Sunny
86°F 30°C
Sunny
Early-Evening
Eureka Weather - 2026-09-10 - Evening - Sunny
83°F 29°C
Sunny
Warm temperatures up to 86°F 30°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds swinging from the SSE to the S at 12 mph 18 km/h.

Friday, September 11, 2026

Mid-Morning
Eureka Weather - 2026-09-11 - Morning - Sunny
60°F 16°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-11 - Afternoon - Sunny
73°F 23°C
Sunny
Early-Evening
Eureka Weather - 2026-09-11 - Evening - Sunny
69°F 21°C
Sunny
Mild with a high of 73°F 23°C, sunny through the afternoon, turning overcast this evening, with lower humidity and steady pressure. Winds shifting from the NNW to the SE at 10 mph 15 km/h.

Saturday, September 12, 2026

Mid-Morning
Eureka Weather - 2026-09-12 - Morning - Partly Cloudy
58°F 14°C
Partly Cloudy
Mid-Afternoon
Eureka Weather - 2026-09-12 - Afternoon - Overcast
70°F 21°C
Overcast
Early-Evening
Eureka Weather - 2026-09-12 - Evening - Overcast
64°F 18°C
Overcast
Pleasant near 70°F 21°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling. Winds turning from the E to the ENE at 20 mph 32 km/h. Gusts up to 29 mph 47 km/h.

Sunday, September 13, 2026

Mid-Morning
Eureka Weather - 2026-09-13 - Morning - Overcast
50°F 10°C
Overcast
Mid-Afternoon
Eureka Weather - 2026-09-13 - Afternoon - Overcast
59°F 15°C
Overcast
Early-Evening
Eureka Weather - 2026-09-13 - Evening - Scattered Showers
57°F 14°C
Scattered Showers
Comfortable at 59°F 15°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds switching from the ENE to the NE at 15 mph 23 km/h. Gusts up to 28 mph 45 km/h.

Monday, September 14, 2026

Mid-Morning
Eureka Weather - 2026-09-14 - Morning - Overcast
45°F 7°C
Overcast
Mid-Afternoon
Eureka Weather - 2026-09-14 - Afternoon - Cloudy
57°F 14°C
Cloudy
Early-Evening
Eureka Weather - 2026-09-14 - Evening - Overcast
56°F 14°C
Overcast
Crisp with a high near 57°F 14°C, overcast throughout the day, with lower humidity and steady pressure. Winds moving from the NNE to the ESE at 6 mph 9 km/h.

Tuesday, September 15, 2026

Mid-Morning
Eureka Weather - 2026-09-15 - Morning - Sunny
54°F 12°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-15 - Afternoon - Sunny
72°F 22°C
Sunny
Early-Evening
Eureka Weather - 2026-09-15 - Evening - Sunny
73°F 23°C
Sunny
Mild temperatures up to 72°F 22°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds swinging from the SSE to the SE at 8 mph 13 km/h.

Wednesday, September 16, 2026

Mid-Morning
Eureka Weather - 2026-09-16 - Morning - Sunny
58°F 15°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-16 - Afternoon - Sunny
63°F 17°C
Sunny
Early-Evening
Eureka Weather - 2026-09-16 - Evening - Cloudy
61°F 17°C
Cloudy
Mildly cool near 63°F 17°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure rising. Winds shifting from the NNW to the SE at 9 mph 15 km/h.

Thursday, September 17, 2026

Mid-Morning
Eureka Weather - 2026-09-17 - Morning - Sunny
49°F 10°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-17 - Afternoon - Overcast
64°F 18°C
Overcast
Early-Evening
Eureka Weather - 2026-09-17 - Evening - Sunny
63°F 17°C
Sunny
Comfortable at 64°F 18°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds blowing from the SSE at 19 mph 30 km/h. Gusts up to 30 mph 48 km/h.

Friday, September 18, 2026

Mid-Morning
Eureka Weather - 2026-09-18 - Morning - Nearby Thunderstorms
63°F 17°C
Nearby Thunderstorms
Mid-Afternoon
Eureka Weather - 2026-09-18 - Afternoon - Sunny
86°F 30°C
Sunny
Early-Evening
Eureka Weather - 2026-09-18 - Evening - Overcast
78°F 26°C
Overcast
Balmy with temperatures reaching 86°F 30°C, heavy thunderstorms conditions at times, with lower humidity and barometric pressure falling. Winds switching from the S to the NNW at 13 mph 20 km/h. Gusts up to 21 mph 34 km/h.

Saturday, September 19, 2026

Mid-Morning
Eureka Weather - 2026-09-19 - Morning - Scattered Showers
48°F 9°C
Scattered Showers
Mid-Afternoon
Eureka Weather - 2026-09-19 - Afternoon - Scattered Showers
47°F 8°C
Scattered Showers
Early-Evening
Eureka Weather - 2026-09-19 - Evening - Overcast
45°F 7°C
Overcast
Brisk around 47°F 8°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure rising. Winds out of the NW at 19 mph 31 km/h. Gusts up to 31 mph 49 km/h.

Sunday, September 20, 2026

Mid-Morning
Eureka Weather - 2026-09-20 - Morning - Scattered Showers
41°F 5°C
Scattered Showers
Mid-Afternoon
Eureka Weather - 2026-09-20 - Afternoon - Scattered Showers
50°F 10°C
Scattered Showers
Early-Evening
Eureka Weather - 2026-09-20 - Evening - Sunny
51°F 10°C
Sunny
Cool and brisk at 50°F 10°C, scattered downpours possible, with lower humidity and steady pressure. Winds swinging from the NW to the S at 6 mph 10 km/h.

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Weather by the Numbers

Mon, 7th
Eureka SD Weather - Monday, Sep 7, 2026 - Patchy Rain Nearby
Hi: 90°F 32°C
Lo: 65°F 18°C
Sunrise 07:07 AM
Sunset 08:05 PM
Wind S 19 mph30 km/h
Dew Point 58°F15°C
uv Index 5
Barometric Pressure 29.71 in1006 mb
POP 17% *
Humidity 48%
Tue, 8th
Eureka SD Weather - Tuesday, Sep 8, 2026 - Sunny
Hi: 81°F 27°C
Lo: 65°F 18°C
Sunrise 07:08 AM
Sunset 08:03 PM
Wind WNW 18 mph29 km/h
Dew Point 40°F4°C
uv Index 5
Barometric Pressure 29.88 in1012 mb
POP 0% *
Humidity 29%
Wed, 9th
Eureka SD Weather - Wednesday, Sep 9, 2026 - Sunny
Hi: 75°F 24°C
Lo: 54°F 12°C
Sunrise 07:10 AM
Sunset 08:01 PM
Wind NW 16 mph26 km/h
Dew Point 39°F4°C
uv Index 5
Barometric Pressure 30.06 in1018 mb
POP 1% *
Humidity 35%
Thu, 10th
Eureka SD Weather - Thursday, Sep 10, 2026 - Sunny
Hi: 87°F 31°C
Lo: 61°F 16°C
Sunrise 07:11 AM
Sunset 07:59 PM
Wind S 11 mph18 km/h
Dew Point 34°F1°C
uv Index 5
Barometric Pressure 29.85 in1011 mb
POP 1% *
Humidity 20%
Fri, 11th
Eureka SD Weather - Friday, Sep 11, 2026 - Sunny
Hi: 74°F 24°C
Lo: 57°F 14°C
Sunrise 07:12 AM
Sunset 07:57 PM
Wind NNW 17 mph27 km/h
Dew Point 30°F-1°C
uv Index 6
Barometric Pressure 29.85 in1011 mb
POP 1% *
Humidity 23%
Sat, 12th
Eureka SD Weather - Saturday, Sep 12, 2026 - Overcast
Hi: 71°F 22°C
Lo: 55°F 13°C
Sunrise 07:13 AM
Sunset 07:55 PM
Wind E 15 mph23 km/h
Dew Point 35°F2°C
uv Index 4
Barometric Pressure 29.8 in1009 mb
POP 10% *
Humidity 33%
Sun, 13th
Eureka SD Weather - Sunday, Sep 13, 2026 - Patchy Rain Nearby
Hi: 61°F 16°C
Lo: 49°F 9°C
Sunrise 07:15 AM
Sunset 07:53 PM
Wind ENE 16 mph26 km/h
Dew Point 41°F5°C
uv Index 3
Barometric Pressure 29.85 in1011 mb
POP 15% *
Humidity 62%
Mon, 14th
Eureka SD Weather - Monday, Sep 14, 2026 - Patchy Rain Nearby
Hi: 59°F 15°C
Lo: 45°F 7°C
Sunrise 07:16 AM
Sunset 07:52 PM
Wind NE 7 mph11 km/h
Dew Point 42°F5°C
uv Index 3
Barometric Pressure 30.15 in1021 mb
POP 15% *
Humidity 71%
Tue, 15th
Eureka SD Weather - Tuesday, Sep 15, 2026 - Sunny
Hi: 75°F 24°C
Lo: 52°F 11°C
Sunrise 07:17 AM
Sunset 07:50 PM
Wind SSE 14 mph23 km/h
Dew Point 43°F6°C
uv Index 5
Barometric Pressure 29.94 in1014 mb
POP 2% *
Humidity 49%
Wed, 16th
Eureka SD Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 65°F 19°C
Lo: 58°F 14°C
Sunrise 07:18 AM
Sunset 07:48 PM
Wind ESE 17 mph27 km/h
Dew Point 44°F7°C
uv Index 5
Barometric Pressure 30.15 in1021 mb
POP 3% *
Humidity 57%
Thu, 17th
Eureka SD Weather - Thursday, Sep 17, 2026 - Partly Cloudy
Hi: 65°F 18°C
Lo: 48°F 9°C
Sunrise 07:20 AM
Sunset 07:46 PM
Wind SE 17 mph27 km/h
Dew Point 36°F2°C
uv Index 4
Barometric Pressure 30.21 in1023 mb
POP 8% *
Humidity 46%
Fri, 18th
Eureka SD Weather - Friday, Sep 18, 2026 - Cloudy
Hi: 88°F 31°C
Lo: 57°F 14°C
Sunrise 07:21 AM
Sunset 07:44 PM
Wind S 17 mph27 km/h
Dew Point 55°F13°C
uv Index 5
Barometric Pressure 29.62 in1003 mb
POP 3% *
Humidity 50%
Sat, 19th
Eureka SD Weather - Saturday, Sep 19, 2026 - Overcast
Hi: 60°F 16°C
Lo: 41°F 5°C
Sunrise 07:22 AM
Sunset 07:42 PM
Wind NW 18 mph30 km/h
Dew Point 40°F4°C
uv Index 2
Barometric Pressure 29.88 in1012 mb
POP 21% *
Humidity 75%
Sun, 20th
Eureka SD Weather - Sunday, Sep 20, 2026 - Patchy Rain Nearby
Hi: 51°F 11°C
Lo: 39°F 4°C
Sunrise 07:23 AM
Sunset 07:40 PM
Wind NW 12 mph19 km/h
Dew Point 28°F-2°C
uv Index 2
Barometric Pressure 30.18 in1022 mb
POP 12% *
Humidity 52%
* POP = Probability of Precipitation. Data for 12:00 PM.