Dorchester, IA Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Dorchester, IA in one place.
Mostly cloudy. High near 74, with temperatures falling to around 72 in the afternoon. West wind 5 to 8 mph. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Dorchester, IA 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 15, 2026 1:32 PM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Dorchester, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 1:32 PM CDT
- Forecast office
- ARX
- Source
- NOAA / NWS
Daily Outlook
This Week in Dorchester
Thursday looks like the warmest upcoming period in Dorchester at 76 degrees F.
Monday Night is the coolest period ahead with temperatures near 48 degrees F.
The strongest winds are forecast for Friday Night at about 10 mph SE.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 1:32 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ARX
- Radar station
- KARX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly cloudy. Low around 52, with temperatures rising to around 54 overnight. North wind around 3 mph.
Partly sunny, with a high near 71. East wind 1 to 5 mph.
A slight chance of showers and thunderstorms between midnight and 1am, then a chance of showers and thunderstorms between 1am and 2am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 59. East wind 0 to 3 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers before 7am. Mostly cloudy, with a high near 76. Northeast wind around 2 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers after 1am. Mostly cloudy, with a low around 57. East wind around 2 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Rain showers likely before 1pm, then showers and thunderstorms. Mostly cloudy, with a high near 72. Southeast wind 3 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.
Showers and thunderstorms. Mostly cloudy, with a low around 59. Southeast wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 76. West wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. North wind 3 to 7 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 69. Northeast wind around 6 mph. Chance of precipitation is 30%.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 50. Northeast wind 1 to 5 mph. Chance of precipitation is 20%.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 69. Northeast wind 1 to 5 mph. Chance of precipitation is 20%.
Partly cloudy, with a low around 48. East wind around 2 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Sep 15
|
Mostly Cloudy
|
74°F |
5 to 8 mph
W
|
|
Tonight
Sep 15
|
Mostly Cloudy
|
52°F |
3 mph
N
|
|
Wednesday
Sep 16
|
Partly Sunny
|
71°F |
1 to 5 mph
E
|
|
Wednesday Night
Sep 16
|
Mostly Cloudy then Slight Chance Showers And Thunderstorms
|
59°F |
0 to 3 mph
E
|
|
Thursday
Sep 17
|
Chance Rain Showers then Mostly Cloudy
|
76°F |
2 mph
NE
|
|
Thursday Night
Sep 17
|
Mostly Cloudy then Chance Rain Showers
|
57°F |
2 mph
E
|
|
Friday
Sep 18
|
Showers And Thunderstorms
|
72°F |
3 to 9 mph
SE
|
|
Friday Night
Sep 18
|
Showers And Thunderstorms
|
59°F |
10 mph
SE
|
|
Saturday
Sep 19
|
Showers And Thunderstorms
|
76°F |
9 mph
W
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
55°F |
3 to 7 mph
N
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
69°F |
6 mph
NE
|
|
Sunday Night
Sep 20
|
Partly Cloudy then Slight Chance Rain Showers
|
50°F |
1 to 5 mph
NE
|
|
Monday
Sep 21
|
Slight Chance Rain Showers then Mostly Sunny
|
69°F |
1 to 5 mph
NE
|
|
Monday Night
Sep 21
|
Partly Cloudy
|
48°F |
2 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Dorchester.