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Flagg IL Weather - Clear - 73°F
Clear
73°F
Updated 1:38 am
Feels Like 83°F
Humidity 94%
Wind N 0 mph
Barometer  29.94 in
Dew Point 71°F
Flagg IL Weather - Clear - 23°C
Clear
23°C
Updated 1:38 am
Feels Like 28°C
Humidity 94%
Wind N 0 km/h
Barometer  101.3 kPa
Dew Point 22°C
Flagg, IL Weather and Current Conditionsflagg il weather forecast

Flagg, IL Weather Forecast

Flagg Illinois WeatherFlagg, Illinois Weather Weather Forecast
Here is the API 14 day weather forecast for Flagg, Illinois. Note: The 7-day weather forecast for Flagg, IL is the most reliable and accurate weather forecast. This template should only be used as a probable scenario. Forecasting weather beyond the next 7 days is a challenge.
Flagg, IL Weather Forecast Dated: 138 AM Sat Sep 05 2026
Expect a very warm period with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.

Saturday, September 5, 2026

Mid-Morning
Flagg Weather - 2026-09-05 - Morning - Sunny
73°F 23°C
Sunny
Mid-Afternoon
Flagg Weather - 2026-09-05 - Afternoon - Sunny
81°F 27°C
Sunny
Early-Evening
Flagg Weather - 2026-09-05 - Evening - Sunny
73°F 23°C
Sunny
Warm and summery around 81°F 27°C (feels like 84°F 29°C), sunny throughout the day, with steady humidity and steady pressure. Winds turning from the NE to the ENE at 10 mph 16 km/h.

Sunday, September 6, 2026

Mid-Morning
Flagg Weather - 2026-09-06 - Morning - Sunny
69°F 21°C
Sunny
Mid-Afternoon
Flagg Weather - 2026-09-06 - Afternoon - Overcast
77°F 25°C
Overcast
Early-Evening
Flagg Weather - 2026-09-06 - Evening - Overcast
69°F 20°C
Overcast
Comfortable with temperatures reaching 77°F 25°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds switching from the ESE to the E at 10 mph 15 km/h.

Monday, September 7, 2026

Mid-Morning
Flagg Weather - 2026-09-07 - Morning - Overcast
65°F 19°C
Overcast
Mid-Afternoon
Flagg Weather - 2026-09-07 - Afternoon - Sunny
75°F 24°C
Sunny
Early-Evening
Flagg Weather - 2026-09-07 - Evening - Sunny
70°F 21°C
Sunny
Enjoyable around 75°F 24°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds SE at 10 mph 15 km/h.

Tuesday, September 8, 2026

Mid-Morning
Flagg Weather - 2026-09-08 - Morning - Cloudy
67°F 20°C
Cloudy
Mid-Afternoon
Flagg Weather - 2026-09-08 - Afternoon - Overcast
80°F 27°C
Overcast
Early-Evening
Flagg Weather - 2026-09-08 - Evening - Overcast
82°F 28°C
Overcast
Warm temperatures up to 80°F 27°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds swinging from the S to the SSE at 14 mph 23 km/h. Gusts up to 34 mph 54 km/h.

Wednesday, September 9, 2026

Mid-Morning
Flagg Weather - 2026-09-09 - Morning - Scattered Showers
72°F 22°C
Scattered Showers
Mid-Afternoon
Flagg Weather - 2026-09-09 - Afternoon - Overcast
79°F 26°C
Overcast
Early-Evening
Flagg Weather - 2026-09-09 - Evening - Cloudy
73°F 23°C
Cloudy
Mild with a high of 79°F 26°C, scattered downpours possible, with lower humidity and steady pressure. Winds shifting from the NW to the WNW at 9 mph 15 km/h. Gusts up to 20 mph 33 km/h.

Thursday, September 10, 2026

Mid-Morning
Flagg Weather - 2026-09-10 - Morning - Overcast
63°F 17°C
Overcast
Mid-Afternoon
Flagg Weather - 2026-09-10 - Afternoon - Partly Cloudy
73°F 23°C
Partly Cloudy
Early-Evening
Flagg Weather - 2026-09-10 - Evening - Partly Cloudy
68°F 20°C
Partly Cloudy
Pleasant near 73°F 23°C, partly cloudy through the afternoon, turning overcast this evening, with increasing humidity and steady pressure.

Friday, September 11, 2026

Mid-Morning
Flagg Weather - 2026-09-11 - Morning - Partly Cloudy
64°F 18°C
Partly Cloudy
Mid-Afternoon
Flagg Weather - 2026-09-11 - Afternoon - Overcast
72°F 22°C
Overcast
Early-Evening
Flagg Weather - 2026-09-11 - Evening - Overcast
69°F 21°C
Overcast
Comfortable with temperatures reaching 72°F 22°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and barometric pressure falling. Winds SE at 9 mph 15 km/h.

Saturday, September 12, 2026

Mid-Morning
Flagg Weather - 2026-09-12 - Morning - Light Showers
64°F 18°C
Light Showers
Mid-Afternoon
Flagg Weather - 2026-09-12 - Afternoon - Scattered Showers
80°F 27°C
Scattered Showers
Early-Evening
Flagg Weather - 2026-09-12 - Evening - Overcast
82°F 28°C
Overcast
Quite warm reaching 80°F 27°C, feeling like 83°F 29°C during peak afternoon, scattered downpours possible, with lower humidity and barometric pressure falling. Winds out of the S at 17 mph 28 km/h. Gusts up to 37 mph 60 km/h.

Sunday, September 13, 2026

Mid-Morning
Flagg Weather - 2026-09-13 - Morning - Sunny
81°F 27°C
Sunny
Mid-Afternoon
Flagg Weather - 2026-09-13 - Afternoon - Sunny
92°F 33°C
Sunny
Early-Evening
Flagg Weather - 2026-09-13 - Evening - Sunny
89°F 32°C
Sunny
Very hot with a high of 92°F 33°C, feeling closer to 96°F 36°C in the humidity, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds moving from the SSW to the SSE at 11 mph 18 km/h. Gusts up to 23 mph 37 km/h.

Monday, September 14, 2026

Mid-Morning
Flagg Weather - 2026-09-14 - Morning - Sunny
80°F 27°C
Sunny
Mid-Afternoon
Flagg Weather - 2026-09-14 - Afternoon - Sunny
91°F 33°C
Sunny
Early-Evening
Flagg Weather - 2026-09-14 - Evening - Sunny
86°F 30°C
Sunny
Sizzling hot near 91°F 33°C with a heat index reaching 95°F 35°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the SSW to the SSE at 15 mph 24 km/h. Gusts up to 27 mph 43 km/h.

Tuesday, September 15, 2026

Mid-Morning
Flagg Weather - 2026-09-15 - Morning - Sunny
79°F 26°C
Sunny
Mid-Afternoon
Flagg Weather - 2026-09-15 - Afternoon - Sunny
89°F 32°C
Sunny
Early-Evening
Flagg Weather - 2026-09-15 - Evening - Cloudy
83°F 28°C
Cloudy
Warm and summery near 89°F 32°C, partly cloudy through the afternoon, turning sunny this evening, with steady humidity and steady pressure. Winds shifting from the SSW to the SSE at 14 mph 23 km/h. Gusts up to 31 mph 50 km/h.

Wednesday, September 16, 2026

Mid-Morning
Flagg Weather - 2026-09-16 - Morning - Sunny
77°F 25°C
Sunny
Mid-Afternoon
Flagg Weather - 2026-09-16 - Afternoon - Sunny
88°F 31°C
Sunny
Early-Evening
Flagg Weather - 2026-09-16 - Evening - Overcast
84°F 29°C
Overcast
Balmy with temperatures reaching 88°F 31°C, sunny in the morning, becoming cloudy through the afternoon and evening, with steady humidity and barometric pressure falling. Winds turning from the S to the SSE at 11 mph 17 km/h. Gusts up to 21 mph 33 km/h.

Thursday, September 17, 2026

Mid-Morning
Flagg Weather - 2026-09-17 - Morning - Overcast
64°F 18°C
Overcast
Mid-Afternoon
Flagg Weather - 2026-09-17 - Afternoon - Sunny
74°F 23°C
Sunny
Early-Evening
Flagg Weather - 2026-09-17 - Evening - Sunny
69°F 21°C
Sunny
Enjoyable around 74°F 23°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds NW at 14 mph 23 km/h. Gusts up to 22 mph 35 km/h.

Friday, September 18, 2026

Mid-Morning
Flagg Weather - 2026-09-18 - Morning - Sunny
50°F 10°C
Sunny
Mid-Afternoon
Flagg Weather - 2026-09-18 - Afternoon - Partly Cloudy
62°F 17°C
Partly Cloudy
Early-Evening
Flagg Weather - 2026-09-18 - Evening - Sunny
55°F 13°C
Sunny
Mildly cool near 62°F 17°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds moving from the N to the NNE at 9 mph 14 km/h.

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Weather by the Numbers

Sat, 5th
Flagg IL Weather - Saturday, Sep 5, 2026 - Partly Cloudy
Hi: 81°F 27°C
Lo: 67°F 19°C
Sunrise 06:26 AM
Sunset 07:23 PM
Wind NE 10 mph16 km/h
Dew Point 70°F21°C
uv Index 7
Barometric Pressure 29.94 in1014 mb
POP 8% *
Humidity 71%
Sun, 6th
Flagg IL Weather - Sunday, Sep 6, 2026 - Overcast
Hi: 77°F 25°C
Lo: 62°F 17°C
Sunrise 06:27 AM
Sunset 07:21 PM
Wind ESE 9 mph14 km/h
Dew Point 62°F17°C
uv Index 7
Barometric Pressure 30.09 in1019 mb
POP 14% *
Humidity 64%
Mon, 7th
Flagg IL Weather - Monday, Sep 7, 2026 - Overcast
Hi: 75°F 24°C
Lo: 62°F 17°C
Sunrise 06:28 AM
Sunset 07:20 PM
Wind SSE 9 mph14 km/h
Dew Point 57°F14°C
uv Index 7
Barometric Pressure 30.15 in1021 mb
POP 14% *
Humidity 61%
Tue, 8th
Flagg IL Weather - Tuesday, Sep 8, 2026 - Overcast
Hi: 83°F 29°C
Lo: 62°F 17°C
Sunrise 06:29 AM
Sunset 07:18 PM
Wind SSW 11 mph18 km/h
Dew Point 60°F15°C
uv Index 7
Barometric Pressure 30.06 in1018 mb
POP 13% *
Humidity 55%
Wed, 9th
Flagg IL Weather - Wednesday, Sep 9, 2026 - Partly Cloudy
Hi: 85°F 30°C
Lo: 67°F 19°C
Sunrise 06:30 AM
Sunset 07:16 PM
Wind NW 13 mph22 km/h
Dew Point 55°F13°C
uv Index 7
Barometric Pressure 30.06 in1018 mb
POP 4% *
Humidity 42%
Thu, 10th
Flagg IL Weather - Thursday, Sep 10, 2026 - Sunny
Hi: 73°F 23°C
Lo: 57°F 14°C
Sunrise 06:31 AM
Sunset 07:14 PM
Wind NE 4 mph6 km/h
Dew Point 48°F9°C
uv Index 6
Barometric Pressure 30.15 in1021 mb
POP 4% *
Humidity 45%
Fri, 11th
Flagg IL Weather - Friday, Sep 11, 2026 - Cloudy
Hi: 73°F 23°C
Lo: 58°F 14°C
Sunrise 06:32 AM
Sunset 07:13 PM
Wind SE 9 mph15 km/h
Dew Point 53°F12°C
uv Index 5
Barometric Pressure 30.12 in1020 mb
POP 11% *
Humidity 54%
Sat, 12th
Flagg IL Weather - Saturday, Sep 12, 2026 - Overcast
Hi: 82°F 28°C
Lo: 63°F 17°C
Sunrise 06:33 AM
Sunset 07:11 PM
Wind S 18 mph28 km/h
Dew Point 62°F17°C
uv Index 5
Barometric Pressure 29.94 in1014 mb
POP 20% *
Humidity 70%
Sun, 13th
Flagg IL Weather - Sunday, Sep 13, 2026 - Sunny
Hi: 93°F 34°C
Lo: 79°F 26°C
Sunrise 06:34 AM
Sunset 07:09 PM
Wind SSW 15 mph24 km/h
Dew Point 66°F19°C
uv Index 8
Barometric Pressure 29.94 in1014 mb
POP 2% *
Humidity 49%
Mon, 14th
Flagg IL Weather - Monday, Sep 14, 2026 - Sunny
Hi: 92°F 33°C
Lo: 78°F 25°C
Sunrise 06:35 AM
Sunset 07:07 PM
Wind SSW 16 mph26 km/h
Dew Point 68°F20°C
uv Index 8
Barometric Pressure 30.06 in1018 mb
POP 2% *
Humidity 54%
Tue, 15th
Flagg IL Weather - Tuesday, Sep 15, 2026 - Partly Cloudy
Hi: 90°F 32°C
Lo: 77°F 25°C
Sunrise 06:36 AM
Sunset 07:06 PM
Wind SSW 15 mph24 km/h
Dew Point 64°F18°C
uv Index 7
Barometric Pressure 30.12 in1020 mb
POP 2% *
Humidity 49%
Wed, 16th
Flagg IL Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 89°F 32°C
Lo: 72°F 22°C
Sunrise 06:37 AM
Sunset 07:04 PM
Wind SSW 13 mph20 km/h
Dew Point 60°F15°C
uv Index 7
Barometric Pressure 30.06 in1018 mb
POP 1% *
Humidity 44%
Thu, 17th
Flagg IL Weather - Thursday, Sep 17, 2026 - Overcast
Hi: 78°F 25°C
Lo: 61°F 16°C
Sunrise 06:38 AM
Sunset 07:02 PM
Wind NNW 13 mph21 km/h
Dew Point 37°F3°C
uv Index 5
Barometric Pressure 30.18 in1022 mb
POP 3% *
Humidity 30%
Fri, 18th
Flagg IL Weather - Friday, Sep 18, 2026 - Sunny
Hi: 63°F 17°C
Lo: 45°F 7°C
Sunrise 06:39 AM
Sunset 07:00 PM
Wind N 14 mph22 km/h
Dew Point 35°F2°C
uv Index 4
Barometric Pressure 30.42 in1030 mb
POP 3% *
Humidity 42%
* POP = Probability of Precipitation. Data for 12:00 PM.