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Sparta Weather Forecast
| THIS AFTERNOON | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
 |  |  |  |  | |  | | | | | |
| Mostly Sunny | Mostly Clear | Chance of T-Storm | Showers Likely | Showers | Showers Likely | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°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 |
| POP: 40% | POP: 70% | POP: 90% | POP: 70% | POP: 50% | POP: 50% | POP: 50% | POP: 50% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 232 PM EDT Fri Sep 18 2026 
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Issued: 335 PM EDT Fri Sep 18 2026
Key Messages
1) Rain showers will slowly increase Saturday, with periods of heavy rain possible Saturday night into Sunday morning. The heaviest rain is expected over the lakeshore counties and also in NW Ohio where localized flooding is possible.
2) Cool and unsettled weather is expected next week.
Discussion
... KEY MESSAGE 1... Canadian high pressure over the northern and central Great Lakes this afternoon through early tonight will briefly keep the active frontal boundary to our south near the O...