Sinai, SD Weather Forecast
Local 7-day forecast
Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Sinai, SD in one place.
A chance of rain showers after 7am. Partly sunny, with a high near 68. East northeast wind 5 to 10 mph. Chance of precipitation is 40%.
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: Apr 13, 2026 6:20 PM CDT.
The active forecast window currently covers Apr 15 to Apr 19, 2026 for Sinai, SD.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 19, 2026
- Latest sync
- Apr 13, 2026 6:20 PM CDT
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in Sinai
Thursday looks like the warmest upcoming period in Sinai at 77 degrees F.
Saturday Night is the coolest period ahead with temperatures near 23 degrees F.
The strongest winds are forecast for Saturday at about 25 to 35 mph NW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 13, 2026 6:20 PM CDT
- Coverage
- 5 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 chance of rain showers. Partly cloudy, with a low around 44. East wind around 10 mph. Chance of precipitation is 40%.
A slight chance of rain showers before 7am. Sunny, with a high near 77.
Mostly clear, with a low around 50.
A chance of rain showers after 7am. Partly sunny, with a high near 59. Chance of precipitation is 40%.
A chance of rain showers before 7pm, then a chance of rain and snow showers. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
A chance of snow showers. Partly sunny, with a high near 46. Chance of precipitation is 30%.
A slight chance of snow showers before 7pm. Partly cloudy, with a low around 23.
Sunny, with a high near 54.
Mostly clear, with a low around 36.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 15
|
Chance Rain Showers
|
68°F |
5 to 10 mph
ENE
|
|
Wednesday Night
Apr 15
|
Chance Rain Showers
|
44°F |
10 mph
E
|
|
Thursday
Apr 16
|
Slight Chance Rain Showers then Sunny
|
77°F |
10 to 15 mph
S
|
|
Thursday Night
Apr 16
|
Mostly Clear
|
50°F |
15 to 20 mph
SSE
|
|
Friday
Apr 17
|
Chance Rain Showers
|
59°F |
20 to 30 mph
WSW
|
|
Friday Night
Apr 17
|
Chance Rain And Snow Showers
|
26°F |
25 to 30 mph
NW
|
|
Saturday
Apr 18
|
Chance Snow Showers
|
46°F |
25 to 35 mph
NW
|
|
Saturday Night
Apr 18
|
Slight Chance Snow Showers then Partly Cloudy
|
23°F |
10 to 30 mph
NW
|
|
Sunday
Apr 19
|
Sunny
|
54°F |
10 to 15 mph
W
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
36°F |
15 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sinai.