Arpan, SD Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Arpan, SD in one place.
Sunny. High near 73, with temperatures falling to around 71 in the afternoon. Northwest wind 6 to 17 mph, with gusts as high as 23 mph.
Local Weather Overview
This forecast page for Arpan, 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: Sep 14, 2026 10:08 PM MDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Arpan, SD.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 14, 2026 10:08 PM MDT
- Forecast office
- UNR
- Source
- NOAA / NWS
Daily Outlook
This Week in Arpan
Wednesday looks like the warmest upcoming period in Arpan at 83 degrees F.
Sunday Night is the coolest period ahead with temperatures near 45 degrees F.
The strongest winds are forecast for Thursday at about 6 to 28 mph E.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 10:08 PM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- UNR
- Radar station
- KUDX
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 after midnight. Partly cloudy, with a low around 52. Southeast wind 21 to 26 mph, with gusts as high as 39 mph. Chance of precipitation is 20%.
Sunny. High near 83, with temperatures falling to around 80 in the afternoon. Northeast wind 10 to 22 mph, with gusts as high as 32 mph.
Partly cloudy, with a low around 50. Northeast wind 5 to 17 mph, with gusts as high as 26 mph.
A slight chance of rain showers before noon, then a slight chance of showers and thunderstorms. Partly sunny. High near 77, with temperatures falling to around 74 in the afternoon. East wind 6 to 28 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
A slight chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 81.
Showers and thunderstorms likely. Mostly cloudy, with a low around 52.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 74.
A chance of showers and thunderstorms. Partly cloudy, with a low around 47.
A chance of rain showers. Mostly sunny, with a high near 74.
Mostly clear, with a low around 45.
Sunny, with a high near 77.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Sep 15
|
Sunny
|
73°F |
6 to 17 mph
NW
|
|
Tuesday Night
Sep 15
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
52°F |
21 to 26 mph
SE
|
|
Wednesday
Sep 16
|
Sunny
|
83°F |
10 to 22 mph
NE
|
|
Wednesday Night
Sep 16
|
Partly Cloudy
|
50°F |
5 to 17 mph
NE
|
|
Thursday
Sep 17
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
77°F |
6 to 28 mph
E
|
|
Thursday Night
Sep 17
|
Slight Chance Showers And Thunderstorms
|
55°F |
7 to 26 mph
SE
|
|
Friday
Sep 18
|
Chance Showers And Thunderstorms
|
81°F |
6 to 20 mph
E
|
|
Friday Night
Sep 18
|
Showers And Thunderstorms Likely
|
52°F |
14 to 20 mph
SW
|
|
Saturday
Sep 19
|
Chance Rain Showers
|
74°F |
14 to 18 mph
NW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
47°F |
10 to 18 mph
S
|
|
Sunday
Sep 20
|
Chance Rain Showers
|
74°F |
10 to 20 mph
NW
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
45°F |
6 to 20 mph
E
|
|
Monday
Sep 21
|
Sunny
|
77°F |
6 to 20 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Arpan.