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Lancaster Weather Forecast
| THIS AFTERNOON | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  | |  |  |  |  | | | | |
| Chance of Showers | Clearing | Mostly Sunny | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy | Partly Cloudy |
| Hi: 61°FHi: 16°C | Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C |
| POP: 20% | POP: 30% | POP: 30% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 236 PM CDT Tue Sep 22 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 201 PM CDT Tue Sep 22 2026
Key Messages
- A respite from the recent rainy pattern will be seen the second half of the week but some isolated showers cannot be ruled out. There are indications the rainy pattern may return late this weekend and into next week influenced by tropical moisture.
- The cooler than normal trend, especially with daytime temperatures, will continue with some moderation by the weekend.
Aviation
/18Z TAFS THROUGH 18Z WEDNESDAY/... Issued at 1214 PM CDT Tue Sep 22 2026
SHRA across far eastern Iowa and norther...