Sinai, SD Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Sinai, SD in one place.
Showers and thunderstorms likely before 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 78. East southeast wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Local Weather Overview
This forecast page for Sinai, SD is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: May 29, 2026 10:54 PM CDT.
The active forecast window currently covers May 30 to Jun 5, 2026 for Sinai, SD.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 30 to Jun 5, 2026
- Latest sync
- May 29, 2026 10:54 PM CDT
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in Sinai
Friday looks like the warmest upcoming period in Sinai at 85 degrees F.
Saturday Night is the coolest period ahead with temperatures near 57 degrees F.
The strongest winds are forecast for Saturday at about 15 to 25 mph ESE.
Precipitation is mentioned in 13 upcoming forecast periods.
Forecast Details
- Last updated
- May 29, 2026 10:54 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- FSD
- Radar station
- KFSD
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms before 8pm, then showers and thunderstorms likely. Mostly cloudy. Low around 57, with temperatures rising to around 61 overnight. Southeast wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Showers and thunderstorms likely before 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely between 7pm and 1am, then a slight chance of showers and thunderstorms. Mostly cloudy. Low around 57, with temperatures rising to around 60 overnight. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. West southwest wind around 10 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 59. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms. Partly sunny, with a high near 83.
A chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
May 30
|
Showers And Thunderstorms Likely
|
78°F |
15 to 25 mph
ESE
|
|
Saturday Night
May 30
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
57°F |
20 to 25 mph
SE
|
|
Sunday
May 31
|
Showers And Thunderstorms Likely
|
78°F |
15 to 20 mph
SE
|
|
Sunday Night
May 31
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
57°F |
10 to 15 mph
SE
|
|
Monday
Jun 1
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
82°F |
10 mph
WSW
|
|
Monday Night
Jun 1
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
59°F |
5 to 10 mph
ENE
|
|
Tuesday
Jun 2
|
Slight Chance Showers And Thunderstorms
|
83°F |
10 mph
SSE
|
|
Tuesday Night
Jun 2
|
Chance Showers And Thunderstorms
|
60°F |
10 mph
SSE
|
|
Wednesday
Jun 3
|
Chance Showers And Thunderstorms
|
83°F |
10 to 15 mph
S
|
|
Wednesday Night
Jun 3
|
Chance Showers And Thunderstorms
|
60°F |
10 to 15 mph
S
|
|
Thursday
Jun 4
|
Chance Showers And Thunderstorms
|
83°F |
10 to 15 mph
SSW
|
|
Thursday Night
Jun 4
|
Chance Showers And Thunderstorms
|
60°F |
10 to 15 mph
SE
|
|
Friday
Jun 5
|
Slight Chance Showers And Thunderstorms
|
85°F |
10 to 15 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sinai.