Castalia, IA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Castalia, IA in one place.
Sunny, with a high near 86. Northwest wind around 9 mph.
Local Weather Overview
This forecast page for Castalia, 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: Jul 17, 2026 4:11 PM CDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Castalia, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 4:11 PM CDT
- Forecast office
- ARX
- Source
- NOAA / NWS
Daily Outlook
This Week in Castalia
Monday looks like the warmest upcoming period in Castalia at 90 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Tuesday at about 9 to 17 mph NW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 4:11 PM CDT
- Coverage
- 6 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
Areas of smoke after 11pm. Mostly clear, with a low around 64. Northeast wind 2 to 6 mph.
Areas of smoke before 7am. Sunny, with a high near 84. Southeast wind around 5 mph.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. South wind 3 to 9 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Showers and thunderstorms likely. Partly sunny, with a high near 90. Southwest wind around 12 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 68. West wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
A slight chance of rain showers before 7am. Sunny, with a high near 80. Northwest wind 9 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Mostly clear, with a low around 57. Northwest wind 6 to 15 mph.
Sunny, with a high near 76. Northwest wind around 6 mph.
Mostly clear, with a low around 56. West wind 1 to 5 mph.
A slight chance of rain showers between 7am and 1pm. Sunny, with a high near 79. West wind around 5 mph. Chance of precipitation is 20%.
Partly cloudy, with a low around 61. Southwest wind around 3 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Sunny
|
86°F |
9 mph
NW
|
|
Saturday Night
Jul 18
|
Areas Of Smoke
|
64°F |
2 to 6 mph
NE
|
|
Sunday
Jul 19
|
Areas Of Smoke then Sunny
|
84°F |
5 mph
SE
|
|
Sunday Night
Jul 19
|
Partly Cloudy then Chance Showers And Thunderstorms
|
68°F |
3 to 9 mph
S
|
|
Monday
Jul 20
|
Showers And Thunderstorms Likely
|
90°F |
12 mph
SW
|
|
Monday Night
Jul 20
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
68°F |
10 mph
W
|
|
Tuesday
Jul 21
|
Slight Chance Rain Showers then Sunny
|
80°F |
9 to 17 mph
NW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
57°F |
6 to 15 mph
NW
|
|
Wednesday
Jul 22
|
Sunny
|
76°F |
6 mph
NW
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
56°F |
1 to 5 mph
W
|
|
Thursday
Jul 23
|
Slight Chance Rain Showers
|
79°F |
5 mph
W
|
|
Thursday Night
Jul 23
|
Partly Cloudy
|
61°F |
3 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Castalia.