Sinai, SD Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sinai, SD in one place.
Sunny, with a high near 93. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
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: Jul 14, 2026 12:41 AM CDT.
The active forecast window currently covers Jul 14 to Jul 20, 2026 for Sinai, SD.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 12:41 AM CDT
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in Sinai
Thursday looks like the warmest upcoming period in Sinai at 96 degrees F.
Sunday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Tuesday at about 10 to 15 mph SSW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 12:41 AM 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
Clear, with a low around 68. South wind 5 to 10 mph.
Sunny, with a high near 94. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Mostly clear, with a low around 71. South wind 10 to 15 mph.
Sunny, with a high near 96. South wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly clear, with a low around 74.
Sunny, with a high near 95.
Mostly clear, with a low around 70.
Sunny, with a high near 93.
Mostly clear, with a low around 68.
Mostly sunny, with a high near 89.
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 85.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
93°F |
10 to 15 mph
SSW
|
|
Tuesday Night
Jul 14
|
Clear
|
68°F |
5 to 10 mph
S
|
|
Wednesday
Jul 15
|
Sunny
|
94°F |
5 to 15 mph
SSW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
71°F |
10 to 15 mph
S
|
|
Thursday
Jul 16
|
Sunny
|
96°F |
10 to 15 mph
S
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
74°F |
10 to 15 mph
S
|
|
Friday
Jul 17
|
Sunny
|
95°F |
10 to 15 mph
WSW
|
|
Friday Night
Jul 17
|
Mostly Clear
|
70°F |
10 mph
NE
|
|
Saturday
Jul 18
|
Sunny
|
93°F |
10 mph
NE
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
68°F |
10 mph
ESE
|
|
Sunday
Jul 19
|
Mostly Sunny
|
89°F |
10 to 15 mph
SSW
|
|
Sunday Night
Jul 19
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
66°F |
10 to 15 mph
SE
|
|
Monday
Jul 20
|
Slight Chance Showers And Thunderstorms then Mostly Sunny
|
85°F |
10 to 15 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sinai.