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Potomac IL Weather - Clear - 82°F
Clear
82°F
Updated 8:46 pm
Feels Like 87°F
Humidity 84%
Wind SE 3 mph
Barometer  29.95 in
Dew Point 76°F
Potomac IL Weather - Clear - 28°C
Clear
28°C
Updated 8:46 pm
Feels Like 31°C
Humidity 84%
Wind SE 5 km/h
Barometer  101.4 kPa
Dew Point 25°C
Potomac, IL Weather and Current Conditionspotomac il weather forecast

Potomac, IL Weather Forecast

Potomac Illinois WeatherPotomac, Illinois Weather Weather Forecast
14 day API forecast for Potomac, Illinois. Note. The 7-day weather forecast for Potomac, IL is the most reliable and accurate forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days in advance.
Potomac, IL Weather Forecast Dated: 846 PM Thu Sep 03 2026
Expect a very warm period with plenty of sunshine and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.

Thursday, September 3, 2026

Mid-Morning
Potomac Weather - 2026-09-03 - Morning - Sunny
81°F 27°C
Sunny
Mid-Afternoon
Potomac Weather - 2026-09-03 - Afternoon - Sunny
95°F 35°C
Sunny
Early-Evening
Potomac Weather - 2026-09-03 - Evening - Sunny
86°F 30°C
Sunny
Sizzling hot near 95°F 35°C with a heat index reaching 105°F 40°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the SW to the SSE at 6 mph 10 km/h.

Friday, September 4, 2026

Mid-Morning
Potomac Weather - 2026-09-04 - Morning - Sunny
81°F 27°C
Sunny
Mid-Afternoon
Potomac Weather - 2026-09-04 - Afternoon - Nearby Thunderstorms
88°F 31°C
Nearby Thunderstorms
Early-Evening
Potomac Weather - 2026-09-04 - Evening - Partly Cloudy
85°F 30°C
Partly Cloudy
Quite warm reaching 88°F 31°C, feeling like 95°F 35°C during peak afternoon, locally heavy thunderstorms at times, with steady humidity and steady pressure. Winds switching from the WSW to the S at 3 mph 5 km/h.

Saturday, September 5, 2026

Mid-Morning
Potomac Weather - 2026-09-05 - Morning - Scattered Showers
71°F 22°C
Scattered Showers
Mid-Afternoon
Potomac Weather - 2026-09-05 - Afternoon - Sunny
86°F 30°C
Sunny
Early-Evening
Potomac Weather - 2026-09-05 - Evening - Sunny
80°F 27°C
Sunny
Very warm near 86°F 30°C, though humidity makes it feel like 93°F 34°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds moving from the SSE to the NE at 9 mph 13 km/h.

Sunday, September 6, 2026

Mid-Morning
Potomac Weather - 2026-09-06 - Morning - Sunny
68°F 20°C
Sunny
Mid-Afternoon
Potomac Weather - 2026-09-06 - Afternoon - Sunny
76°F 25°C
Sunny
Early-Evening
Potomac Weather - 2026-09-06 - Evening - Sunny
70°F 21°C
Sunny
Mild temperatures up to 76°F 25°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the ENE to the E at 9 mph 13 km/h.

Monday, September 7, 2026

Mid-Morning
Potomac Weather - 2026-09-07 - Morning - Partly Cloudy
63°F 17°C
Partly Cloudy
Mid-Afternoon
Potomac Weather - 2026-09-07 - Afternoon - Sunny
75°F 24°C
Sunny
Early-Evening
Potomac Weather - 2026-09-07 - Evening - Sunny
70°F 21°C
Sunny
Mild with a high of 75°F 24°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the ENE at 8 mph 13 km/h.

Tuesday, September 8, 2026

Mid-Morning
Potomac Weather - 2026-09-08 - Morning - Partly Cloudy
68°F 20°C
Partly Cloudy
Mid-Afternoon
Potomac Weather - 2026-09-08 - Afternoon - Sunny
82°F 28°C
Sunny
Early-Evening
Potomac Weather - 2026-09-08 - Evening - Sunny
80°F 27°C
Sunny
Warm and summery near 82°F 28°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds turning from the SSE to the SE at 8 mph 13 km/h.

Wednesday, September 9, 2026

Mid-Morning
Potomac Weather - 2026-09-09 - Morning - Overcast
81°F 27°C
Overcast
Mid-Afternoon
Potomac Weather - 2026-09-09 - Afternoon - Partly Cloudy
87°F 30°C
Partly Cloudy
Early-Evening
Potomac Weather - 2026-09-09 - Evening - Overcast
79°F 27°C
Overcast
Warm and summery around 87°F 30°C (feels like 93°F 34°C), partly cloudy in the morning, overcast in the afternoon, and partly cloudy this evening, with increasing humidity and steady pressure. Winds switching from the SW to the ESE at 7 mph 12 km/h.

Thursday, September 10, 2026

Mid-Morning
Potomac Weather - 2026-09-10 - Morning - Partly Cloudy
74°F 23°C
Partly Cloudy
Mid-Afternoon
Potomac Weather - 2026-09-10 - Afternoon - Overcast
85°F 29°C
Overcast
Early-Evening
Potomac Weather - 2026-09-10 - Evening - Partly Cloudy
79°F 26°C
Partly Cloudy
Quite warm around 85°F 29°C, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the ESE to the E at 8 mph 12 km/h.

Friday, September 11, 2026

Mid-Morning
Potomac Weather - 2026-09-11 - Morning - Cloudy
72°F 22°C
Cloudy
Mid-Afternoon
Potomac Weather - 2026-09-11 - Afternoon - Sunny
83°F 28°C
Sunny
Early-Evening
Potomac Weather - 2026-09-11 - Evening - Partly Cloudy
79°F 26°C
Partly Cloudy
Very warm near 83°F 28°C, though humidity makes it feel like 86°F 30°C, partly cloudy throughout the day, with steady humidity and steady pressure. Winds E at 9 mph 14 km/h. Gusts up to 21 mph 35 km/h.

Saturday, September 12, 2026

Mid-Morning
Potomac Weather - 2026-09-12 - Morning - Overcast
75°F 24°C
Overcast
Mid-Afternoon
Potomac Weather - 2026-09-12 - Afternoon - Sunny
92°F 34°C
Sunny
Early-Evening
Potomac Weather - 2026-09-12 - Evening - Nearby Thunderstorms
83°F 29°C
Nearby Thunderstorms
Sizzling hot near 92°F 34°C with a heat index reaching 100°F 38°C, periods of heavy thunderstorms, with steady humidity and steady pressure. Winds shifting from the SSE to the ESE at 10 mph 16 km/h. Gusts up to 22 mph 35 km/h.

Sunday, September 13, 2026

Mid-Morning
Potomac Weather - 2026-09-13 - Morning - Sunny
82°F 28°C
Sunny
Mid-Afternoon
Potomac Weather - 2026-09-13 - Afternoon - Sunny
92°F 34°C
Sunny
Early-Evening
Potomac Weather - 2026-09-13 - Evening - Sunny
82°F 28°C
Sunny
Hot and sweltering around 92°F 34°C (heat index 98°F 36°C), sunny through the afternoon, turning cloudy this evening, with increasing humidity and steady pressure. Winds turning from the WSW to the SSW at 8 mph 13 km/h.

Monday, September 14, 2026

Mid-Morning
Potomac Weather - 2026-09-14 - Morning - Scattered Showers
76°F 24°C
Scattered Showers
Mid-Afternoon
Potomac Weather - 2026-09-14 - Afternoon - Overcast
89°F 31°C
Overcast
Early-Evening
Potomac Weather - 2026-09-14 - Evening - Overcast
79°F 26°C
Overcast
Very warm near 89°F 31°C, though humidity makes it feel like 95°F 35°C, locally heavy downpours at times, with steady humidity and barometric pressure falling. Winds switching from the SSW to the SW at 4 mph 6 km/h.

Tuesday, September 15, 2026

Mid-Morning
Potomac Weather - 2026-09-15 - Morning - Sunny
64°F 18°C
Sunny
Mid-Afternoon
Potomac Weather - 2026-09-15 - Afternoon - Sunny
71°F 22°C
Sunny
Early-Evening
Potomac Weather - 2026-09-15 - Evening - Sunny
65°F 18°C
Sunny
Enjoyable around 71°F 22°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the W to the NW at 9 mph 15 km/h.

Wednesday, September 16, 2026

Mid-Morning
Potomac Weather - 2026-09-16 - Morning - Sunny
59°F 15°C
Sunny
Mid-Afternoon
Potomac Weather - 2026-09-16 - Afternoon - Sunny
67°F 19°C
Sunny
Early-Evening
Potomac Weather - 2026-09-16 - Evening - Sunny
63°F 17°C
Sunny
Mildly cool near 67°F 19°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds swinging from the NW to the ESE at 7 mph 11 km/h.

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Weather by the Numbers

Thu, 3rd
Potomac IL Weather - Thursday, Sep 3, 2026 - Sunny
Hi: 95°F 35°C
Lo: 73°F 23°C
Sunrise 06:21 AM
Sunset 07:20 PM
Wind SW 11 mph17 km/h
Dew Point 75°F24°C
uv Index 8
Barometric Pressure 29.97 in1015 mb
POP 3% *
Humidity 58%
Fri, 4th
Potomac IL Weather - Friday, Sep 4, 2026 - Sunny
Hi: 89°F 32°C
Lo: 77°F 25°C
Sunrise 06:22 AM
Sunset 07:18 PM
Wind WNW 11 mph18 km/h
Dew Point 71°F22°C
uv Index 8
Barometric Pressure 29.94 in1014 mb
POP 3% *
Humidity 57%
Sat, 5th
Potomac IL Weather - Saturday, Sep 5, 2026 - Sunny
Hi: 86°F 30°C
Lo: 71°F 22°C
Sunrise 06:23 AM
Sunset 07:17 PM
Wind NW 2 mph3 km/h
Dew Point 71°F22°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 5% *
Humidity 67%
Sun, 6th
Potomac IL Weather - Sunday, Sep 6, 2026 - Sunny
Hi: 76°F 25°C
Lo: 65°F 18°C
Sunrise 06:24 AM
Sunset 07:15 PM
Wind ENE 12 mph19 km/h
Dew Point 60°F16°C
uv Index 7
Barometric Pressure 30.06 in1018 mb
POP 4% *
Humidity 62%
Mon, 7th
Potomac IL Weather - Monday, Sep 7, 2026 - Partly Cloudy
Hi: 75°F 24°C
Lo: 59°F 15°C
Sunrise 06:25 AM
Sunset 07:14 PM
Wind E 8 mph12 km/h
Dew Point 57°F14°C
uv Index 6
Barometric Pressure 30.15 in1021 mb
POP 6% *
Humidity 61%
Tue, 8th
Potomac IL Weather - Tuesday, Sep 8, 2026 - Overcast
Hi: 84°F 29°C
Lo: 62°F 16°C
Sunrise 06:26 AM
Sunset 07:12 PM
Wind SSE 8 mph12 km/h
Dew Point 61°F16°C
uv Index 5
Barometric Pressure 30.09 in1019 mb
POP 6% *
Humidity 58%
Wed, 9th
Potomac IL Weather - Wednesday, Sep 9, 2026 - Sunny
Hi: 90°F 32°C
Lo: 73°F 23°C
Sunrise 06:27 AM
Sunset 07:10 PM
Wind W 14 mph22 km/h
Dew Point 68°F20°C
uv Index 8
Barometric Pressure 29.97 in1015 mb
POP 4% *
Humidity 54%
Thu, 10th
Potomac IL Weather - Thursday, Sep 10, 2026 - Overcast
Hi: 85°F 30°C
Lo: 71°F 21°C
Sunrise 06:28 AM
Sunset 07:09 PM
Wind E 5 mph8 km/h
Dew Point 64°F18°C
uv Index 6
Barometric Pressure 30 in1016 mb
POP 13% *
Humidity 58%
Fri, 11th
Potomac IL Weather - Friday, Sep 11, 2026 - Sunny
Hi: 83°F 28°C
Lo: 69°F 21°C
Sunrise 06:29 AM
Sunset 07:07 PM
Wind E 9 mph14 km/h
Dew Point 66°F19°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 4% *
Humidity 64%
Sat, 12th
Potomac IL Weather - Saturday, Sep 12, 2026 - Sunny
Hi: 94°F 34°C
Lo: 70°F 21°C
Sunrise 06:29 AM
Sunset 07:05 PM
Wind S 7 mph11 km/h
Dew Point 68°F20°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 3% *
Humidity 57%
Sun, 13th
Potomac IL Weather - Sunday, Sep 13, 2026 - Sunny
Hi: 93°F 34°C
Lo: 74°F 23°C
Sunrise 06:30 AM
Sunset 07:04 PM
Wind WSW 9 mph15 km/h
Dew Point 66°F19°C
uv Index 8
Barometric Pressure 29.91 in1013 mb
POP 1% *
Humidity 47%
Mon, 14th
Potomac IL Weather - Monday, Sep 14, 2026 - Cloudy
Hi: 89°F 32°C
Lo: 69°F 21°C
Sunrise 06:31 AM
Sunset 07:02 PM
Wind SSW 12 mph20 km/h
Dew Point 69°F20°C
uv Index 6
Barometric Pressure 29.94 in1014 mb
POP 12% *
Humidity 60%
Tue, 15th
Potomac IL Weather - Tuesday, Sep 15, 2026 - Sunny
Hi: 72°F 22°C
Lo: 59°F 15°C
Sunrise 06:32 AM
Sunset 07:00 PM
Wind W 16 mph26 km/h
Dew Point 51°F11°C
uv Index 6
Barometric Pressure 29.8 in1009 mb
POP 2% *
Humidity 52%
Wed, 16th
Potomac IL Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 67°F 20°C
Lo: 55°F 13°C
Sunrise 06:33 AM
Sunset 06:59 PM
Wind NW 11 mph17 km/h
Dew Point 49°F9°C
uv Index 5
Barometric Pressure 30.06 in1018 mb
POP 3% *
Humidity 57%
* POP = Probability of Precipitation. Data for 12:00 PM.