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Seneca IL Weather - Clear - 93°F
Clear
93°F
Updated 1:44 pm
Feels Like 112°F
Humidity 57%
Wind SW 8 mph
Barometer  29.98 in
Dew Point 76°F
Seneca IL Weather - Clear - 34°C
Clear
34°C
Updated 1:44 pm
Feels Like 45°C
Humidity 57%
Wind SW 13 km/h
Barometer  101.5 kPa
Dew Point 24°C
Seneca, IL Weather and Current Conditionsseneca il weather forecast

Seneca, IL Weather Forecast

Seneca Illinois WeatherSeneca, Illinois Weather Weather Forecast
14 Day API Seneca, IL Weather Forecast. Note: Our 7 day Seneca, Illinois weather forecast is our most reliable, and specific forecast. This model should only be used as a probable scenario. Forecasting more than 7 days ahead is challenging.
Seneca, IL Weather Forecast Dated: 144 PM Wed Sep 02 2026 (Seneca Time)
Expect a very warm period with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate. Isolated storms at times.

Wednesday, September 2, 2026

Mid-Morning
Seneca Weather - 2026-09-02 - Morning - Overcast
81°F 27°C
Overcast
Mid-Afternoon
Seneca Weather - 2026-09-02 - Afternoon - Sunny
98°F 37°C
Sunny
Early-Evening
Seneca Weather - 2026-09-02 - Evening - Sunny
87°F 31°C
Sunny
Sizzling hot near 98°F 37°C with a heat index reaching 112°F 45°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and barometric pressure falling. Winds turning from the SW to the SSE at 7 mph 11 km/h.

Thursday, September 3, 2026

Mid-Morning
Seneca Weather - 2026-09-03 - Morning - Cloudy
80°F 27°C
Cloudy
Mid-Afternoon
Seneca Weather - 2026-09-03 - Afternoon - Sunny
91°F 33°C
Sunny
Early-Evening
Seneca Weather - 2026-09-03 - Evening - Thundery Outbreaks In Nearby
85°F 30°C
Nearby Thunderstorms
Hot and sweltering around 91°F 33°C (heat index 98°F 36°C), locally heavy thunderstorms at times, with steady humidity and steady pressure. Winds switching from the SSW to the SSE at 9 mph 14 km/h.

Friday, September 4, 2026

Mid-Morning
Seneca Weather - 2026-09-04 - Morning - Sunny
79°F 26°C
Sunny
Mid-Afternoon
Seneca Weather - 2026-09-04 - Afternoon - Thundery Outbreaks In Nearby
91°F 33°C
Nearby Thunderstorms
Early-Evening
Seneca Weather - 2026-09-04 - Evening - Sunny
85°F 30°C
Sunny
Very hot with a high of 91°F 33°C, feeling closer to 98°F 37°C in the humidity, heavy thunderstorms conditions at times, with steady humidity and steady pressure. Winds moving from the W to the ESE at 4 mph 5 km/h.

Saturday, September 5, 2026

Mid-Morning
Seneca Weather - 2026-09-05 - Morning - Partly Cloudy
77°F 25°C
Partly Cloudy
Mid-Afternoon
Seneca Weather - 2026-09-05 - Afternoon - Thundery Outbreaks In Nearby
88°F 31°C
Nearby Thunderstorms
Early-Evening
Seneca Weather - 2026-09-05 - Evening - Sunny
81°F 28°C
Sunny
Warm and summery around 88°F 31°C (feels like 97°F 36°C), periods of heavy thunderstorms, with steady humidity and steady pressure. Winds swinging from the ENE to the E at 8 mph 13 km/h.

Sunday, September 6, 2026

Mid-Morning
Seneca Weather - 2026-09-06 - Morning - Overcast
68°F 20°C
Overcast
Mid-Afternoon
Seneca Weather - 2026-09-06 - Afternoon - Overcast
82°F 28°C
Overcast
Early-Evening
Seneca Weather - 2026-09-06 - Evening - Light Rain Shower
78°F 26°C
Light Showers
Quite warm reaching 82°F 28°C, feeling like 85°F 30°C during peak afternoon, mainly dry until evening showers arrive, with steady humidity and steady pressure. Winds shifting from the SE to the ESE at 8 mph 13 km/h.

Monday, September 7, 2026

Mid-Morning
Seneca Weather - 2026-09-07 - Morning - Overcast
74°F 24°C
Overcast
Mid-Afternoon
Seneca Weather - 2026-09-07 - Afternoon - Overcast
84°F 29°C
Overcast
Early-Evening
Seneca Weather - 2026-09-07 - Evening - Thundery Outbreaks In Nearby
75°F 24°C
Nearby Thunderstorms
Very warm near 84°F 29°C, though humidity makes it feel like 90°F 32°C, heavy thunderstorms conditions at times, with steady humidity and steady pressure. A stray shower or storm late in the day.

Tuesday, September 8, 2026

Mid-Morning
Seneca Weather - 2026-09-08 - Morning - Overcast
66°F 19°C
Overcast
Mid-Afternoon
Seneca Weather - 2026-09-08 - Afternoon - Overcast
64°F 18°C
Overcast
Early-Evening
Seneca Weather - 2026-09-08 - Evening - Patchy Rain Nearby
61°F 16°C
Scattered Showers
Comfortable at 64°F 18°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure rising. Winds turning from the SE to the ENE at 14 mph 23 km/h. Gusts up to 23 mph 38 km/h.

Wednesday, September 9, 2026

Mid-Morning
Seneca Weather - 2026-09-09 - Morning - Sunny
59°F 15°C
Sunny
Mid-Afternoon
Seneca Weather - 2026-09-09 - Afternoon - Partly Cloudy
74°F 23°C
Partly Cloudy
Early-Evening
Seneca Weather - 2026-09-09 - Evening - Overcast
73°F 23°C
Overcast
Enjoyable around 74°F 23°C, cloudy in the morning, overcast in the afternoon, and sunny this evening, with steady humidity and barometric pressure falling. Winds switching from the ESE to the SE at 12 mph 19 km/h. Gusts up to 25 mph 40 km/h.

Thursday, September 10, 2026

Mid-Morning
Seneca Weather - 2026-09-10 - Morning - Sunny
85°F 30°C
Sunny
Mid-Afternoon
Seneca Weather - 2026-09-10 - Afternoon - Overcast
98°F 37°C
Overcast
Early-Evening
Seneca Weather - 2026-09-10 - Evening - Thundery Outbreaks In Nearby
90°F 32°C
Nearby Thunderstorms
Very hot with a high of 98°F 37°C, feeling closer to 106°F 41°C in the humidity, heavy thunderstorms conditions at times, with steady humidity and steady pressure. Winds moving from the SW to the WSW at 10 mph 16 km/h.

Friday, September 11, 2026

Mid-Morning
Seneca Weather - 2026-09-11 - Morning - Overcast
67°F 19°C
Overcast
Mid-Afternoon
Seneca Weather - 2026-09-11 - Afternoon - Overcast
70°F 21°C
Overcast
Early-Evening
Seneca Weather - 2026-09-11 - Evening - Overcast
67°F 20°C
Overcast
Mild with a high of 70°F 21°C, overcast throughout the day, with steady humidity and steady pressure.

Saturday, September 12, 2026

Mid-Morning
Seneca Weather - 2026-09-12 - Morning - Overcast
67°F 19°C
Overcast
Mid-Afternoon
Seneca Weather - 2026-09-12 - Afternoon - Overcast
78°F 25°C
Overcast
Early-Evening
Seneca Weather - 2026-09-12 - Evening - Patchy Rain Nearby
71°F 22°C
Scattered Showers
Pleasant near 78°F 25°C, scattered downpours possible, with steady humidity and steady pressure. Winds ESE at 9 mph 14 km/h.

Sunday, September 13, 2026

Mid-Morning
Seneca Weather - 2026-09-13 - Morning - Light Rain Shower
69°F 21°C
Light Showers
Mid-Afternoon
Seneca Weather - 2026-09-13 - Afternoon - Partly Cloudy
88°F 31°C
Partly Cloudy
Early-Evening
Seneca Weather - 2026-09-13 - Evening - Sunny
83°F 28°C
Sunny
Very warm near 88°F 31°C, though humidity makes it feel like 94°F 34°C, morning showers, giving way to clearing skies, with lower humidity and barometric pressure falling. Winds shifting from the SE to the S at 10 mph 15 km/h. Gusts up to 21 mph 34 km/h.

Monday, September 14, 2026

Mid-Morning
Seneca Weather - 2026-09-14 - Morning - Patchy Rain Nearby
80°F 26°C
Scattered Showers
Mid-Afternoon
Seneca Weather - 2026-09-14 - Afternoon - Sunny
90°F 32°C
Sunny
Early-Evening
Seneca Weather - 2026-09-14 - Evening - Sunny
75°F 24°C
Sunny
Sizzling hot near 90°F 32°C with a heat index reaching 96°F 36°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure. Winds turning from the W to the NE at 12 mph 19 km/h. Gusts up to 21 mph 33 km/h.

Tuesday, September 15, 2026

Mid-Morning
Seneca Weather - 2026-09-15 - Morning - Partly Cloudy
67°F 19°C
Partly Cloudy
Mid-Afternoon
Seneca Weather - 2026-09-15 - Afternoon - Patchy Rain Nearby
78°F 26°C
Scattered Showers
Early-Evening
Seneca Weather - 2026-09-15 - Evening - Patchy Rain Nearby
72°F 23°C
Scattered Showers
Mild temperatures up to 78°F 26°C, scattered downpours possible, with steady humidity and barometric pressure falling. Winds ENE at 9 mph 14 km/h.

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