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Alta IL Weather - Clear - 82°F
Clear
82°F
Updated 3:53 pm
Feels Like 84°F
Humidity 42%
Wind E 8 mph
Barometer  30.11 in
Dew Point 57°F
Alta IL Weather - Clear - 28°C
Clear
28°C
Updated 3:53 pm
Feels Like 29°C
Humidity 42%
Wind E 13 km/h
Barometer  102 kPa
Dew Point 14°C
Alta, IL Weather and Current Conditionsalta il weather forecast

Alta, IL Weather Forecast

Alta Illinois WeatherAlta, Illinois Weather Weather Forecast
14 Day API Alta, IL Weather Forecast. Note: Our 7 day Alta, 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.
Alta, IL Weather Forecast Dated: 353 PM Mon Sep 07 2026
Expect a very warm period with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.

Monday, September 7, 2026

Mid-Morning
Alta Weather - 2026-09-07 - Morning - Sunny
68°F 20°C
Sunny
Mid-Afternoon
Alta Weather - 2026-09-07 - Afternoon - Sunny
84°F 29°C
Sunny
Early-Evening
Alta Weather - 2026-09-07 - Evening - Overcast
74°F 23°C
Overcast
Warm and summery near 84°F 29°C, sunny through the afternoon, turning overcast this evening, with lower humidity and steady pressure. Winds turning from the ESE to the SE at 9 mph 14 km/h.

Tuesday, September 8, 2026

Mid-Morning
Alta Weather - 2026-09-08 - Morning - Partly Cloudy
69°F 21°C
Partly Cloudy
Mid-Afternoon
Alta Weather - 2026-09-08 - Afternoon - Partly Cloudy
88°F 31°C
Partly Cloudy
Early-Evening
Alta Weather - 2026-09-08 - Evening - Sunny
84°F 29°C
Sunny
Balmy with temperatures reaching 88°F 31°C, partly cloudy through the afternoon, turning sunny this evening, with lower humidity and barometric pressure falling. Winds switching from the S to the SSE at 12 mph 19 km/h. Gusts up to 26 mph 41 km/h.

Wednesday, September 9, 2026

Mid-Morning
Alta Weather - 2026-09-09 - Morning - Scattered Showers
71°F 22°C
Scattered Showers
Mid-Afternoon
Alta Weather - 2026-09-09 - Afternoon - Scattered Showers
72°F 22°C
Scattered Showers
Early-Evening
Alta Weather - 2026-09-09 - Evening - Overcast
74°F 23°C
Overcast
Enjoyable around 72°F 22°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the NW to the WSW at 5 mph 9 km/h.

Thursday, September 10, 2026

Mid-Morning
Alta Weather - 2026-09-10 - Morning - Scattered Showers
68°F 20°C
Scattered Showers
Mid-Afternoon
Alta Weather - 2026-09-10 - Afternoon - Sunny
80°F 26°C
Sunny
Early-Evening
Alta Weather - 2026-09-10 - Evening - Sunny
71°F 22°C
Sunny
Warm temperatures up to 80°F 26°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure.

Friday, September 11, 2026

Mid-Morning
Alta Weather - 2026-09-11 - Morning - Overcast
65°F 18°C
Overcast
Mid-Afternoon
Alta Weather - 2026-09-11 - Afternoon - Overcast
83°F 29°C
Overcast
Early-Evening
Alta Weather - 2026-09-11 - Evening - Sunny
74°F 24°C
Sunny
Very warm with a high of 83°F 29°C, overcast through the afternoon, turning sunny this evening, with steady humidity and barometric pressure falling. Winds swinging from the S to the SE at 8 mph 13 km/h.

Saturday, September 12, 2026

Mid-Morning
Alta Weather - 2026-09-12 - Morning - Overcast
72°F 22°C
Overcast
Mid-Afternoon
Alta Weather - 2026-09-12 - Afternoon - Overcast
82°F 28°C
Overcast
Early-Evening
Alta Weather - 2026-09-12 - Evening - Partly Cloudy
73°F 23°C
Partly Cloudy
Warm and summery near 82°F 28°C, overcast in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds shifting from the W to the SE at 10 mph 15 km/h. Gusts up to 20 mph 32 km/h.

Sunday, September 13, 2026

Mid-Morning
Alta Weather - 2026-09-13 - Morning - Sunny
69°F 21°C
Sunny
Mid-Afternoon
Alta Weather - 2026-09-13 - Afternoon - Overcast
86°F 30°C
Overcast
Early-Evening
Alta Weather - 2026-09-13 - Evening - Overcast
79°F 26°C
Overcast
Balmy with temperatures reaching 86°F 30°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and barometric pressure falling. Winds turning from the ESE to the NE at 7 mph 11 km/h.

Monday, September 14, 2026

Mid-Morning
Alta Weather - 2026-09-14 - Morning - Light Showers
70°F 21°C
Light Showers
Mid-Afternoon
Alta Weather - 2026-09-14 - Afternoon - Partly Cloudy
89°F 32°C
Partly Cloudy
Early-Evening
Alta Weather - 2026-09-14 - Evening - Nearby Thunderstorms
81°F 27°C
Nearby Thunderstorms
Quite warm reaching 89°F 32°C, feeling like 94°F 35°C during peak afternoon, scattered downpours possible, with lower humidity and barometric pressure falling. Winds switching from the SE to the NE at 9 mph 14 km/h.

Tuesday, September 15, 2026

Mid-Morning
Alta Weather - 2026-09-15 - Morning - Light Showers
67°F 20°C
Light Showers
Mid-Afternoon
Alta Weather - 2026-09-15 - Afternoon - Scattered Showers
68°F 20°C
Scattered Showers
Early-Evening
Alta Weather - 2026-09-15 - Evening - Overcast
64°F 18°C
Overcast
Mild temperatures up to 68°F 20°C, locally heavy downpours at times, with lower humidity and barometric pressure rising. Winds moving from the NW to the NNW at 10 mph 17 km/h. Gusts up to 21 mph 34 km/h.

Wednesday, September 16, 2026

Mid-Morning
Alta Weather - 2026-09-16 - Morning - Sunny
60°F 15°C
Sunny
Mid-Afternoon
Alta Weather - 2026-09-16 - Afternoon - Sunny
70°F 21°C
Sunny
Early-Evening
Alta Weather - 2026-09-16 - Evening - Sunny
61°F 16°C
Sunny
Mild with a high of 70°F 21°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the NW to the NE at 7 mph 11 km/h.

Thursday, September 17, 2026

Mid-Morning
Alta Weather - 2026-09-17 - Morning - Sunny
56°F 14°C
Sunny
Mid-Afternoon
Alta Weather - 2026-09-17 - Afternoon - Cloudy
69°F 20°C
Cloudy
Early-Evening
Alta Weather - 2026-09-17 - Evening - Sunny
61°F 17°C
Sunny
Pleasant near 69°F 20°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds out of the N at 9 mph 15 km/h.

Friday, September 18, 2026

Mid-Morning
Alta Weather - 2026-09-18 - Morning - Sunny
69°F 21°C
Sunny
Mid-Afternoon
Alta Weather - 2026-09-18 - Afternoon - Sunny
82°F 28°C
Sunny
Early-Evening
Alta Weather - 2026-09-18 - Evening - Overcast
77°F 25°C
Overcast
Balmy with temperatures reaching 82°F 28°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and barometric pressure falling. Winds turning from the S to the SSW at 10 mph 17 km/h. Gusts up to 25 mph 39 km/h.

Saturday, September 19, 2026

Mid-Morning
Alta Weather - 2026-09-19 - Morning - Overcast
74°F 23°C
Overcast
Mid-Afternoon
Alta Weather - 2026-09-19 - Afternoon - Sunny
85°F 29°C
Sunny
Early-Evening
Alta Weather - 2026-09-19 - Evening - Sunny
78°F 26°C
Sunny
Quite warm around 85°F 29°C, partly cloudy in the morning, sunny in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds switching from the SW to the E at 5 mph 8 km/h.

Sunday, September 20, 2026

Mid-Morning
Alta Weather - 2026-09-20 - Morning - Sunny
59°F 15°C
Sunny
Mid-Afternoon
Alta Weather - 2026-09-20 - Afternoon - Sunny
67°F 19°C
Sunny
Early-Evening
Alta Weather - 2026-09-20 - Evening - Sunny
59°F 15°C
Sunny
Mildly cool near 67°F 19°C, sunny throughout the day, with steady humidity and steady pressure. Winds out of the NE at 15 mph 24 km/h. Gusts up to 22 mph 36 km/h.

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Weather by the Numbers

Mon, 7th
Alta IL Weather - Monday, Sep 7, 2026 - Sunny
Hi: 84°F 29°C
Lo: 60°F 15°C
Sunrise 06:31 AM
Sunset 07:21 PM
Wind ESE 10 mph17 km/h
Dew Point 59°F15°C
uv Index 7
Barometric Pressure 30.12 in1020 mb
POP 1% *
Humidity 47%
Tue, 8th
Alta IL Weather - Tuesday, Sep 8, 2026 - Cloudy
Hi: 88°F 31°C
Lo: 62°F 17°C
Sunrise 06:32 AM
Sunset 07:19 PM
Wind S 10 mph16 km/h
Dew Point 57°F14°C
uv Index 7
Barometric Pressure 30.06 in1018 mb
POP 6% *
Humidity 42%
Wed, 9th
Alta IL Weather - Wednesday, Sep 9, 2026 - Light Rain Shower
Hi: 83°F 28°C
Lo: 70°F 21°C
Sunrise 06:33 AM
Sunset 07:17 PM
Wind SSE 5 mph8 km/h
Dew Point 68°F20°C
uv Index 3
Barometric Pressure 30 in1016 mb
POP 52% *
Humidity 90%
Thu, 10th
Alta IL Weather - Thursday, Sep 10, 2026 - Patchy Rain Nearby
Hi: 80°F 26°C
Lo: 62°F 17°C
Sunrise 06:34 AM
Sunset 07:16 PM
Wind NNE 6 mph10 km/h
Dew Point 63°F17°C
uv Index 4
Barometric Pressure 29.94 in1014 mb
POP 20% *
Humidity 68%
Fri, 11th
Alta IL Weather - Friday, Sep 11, 2026 - Overcast
Hi: 83°F 29°C
Lo: 59°F 15°C
Sunrise 06:35 AM
Sunset 07:14 PM
Wind SSE 9 mph14 km/h
Dew Point 60°F16°C
uv Index 6
Barometric Pressure 29.94 in1014 mb
POP 12% *
Humidity 52%
Sat, 12th
Alta IL Weather - Saturday, Sep 12, 2026 - Overcast
Hi: 82°F 28°C
Lo: 65°F 18°C
Sunrise 06:36 AM
Sunset 07:12 PM
Wind NW 8 mph13 km/h
Dew Point 64°F18°C
uv Index 6
Barometric Pressure 29.94 in1014 mb
POP 14% *
Humidity 60%
Sun, 13th
Alta IL Weather - Sunday, Sep 13, 2026 - Cloudy
Hi: 87°F 31°C
Lo: 63°F 17°C
Sunrise 06:37 AM
Sunset 07:10 PM
Wind SSE 7 mph12 km/h
Dew Point 63°F17°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 10% *
Humidity 57%
Mon, 14th
Alta IL Weather - Monday, Sep 14, 2026 - Cloudy
Hi: 91°F 33°C
Lo: 64°F 18°C
Sunrise 06:38 AM
Sunset 07:09 PM
Wind S 8 mph13 km/h
Dew Point 70°F21°C
uv Index 6
Barometric Pressure 29.91 in1013 mb
POP 11% *
Humidity 71%
Tue, 15th
Alta IL Weather - Tuesday, Sep 15, 2026 - Cloudy
Hi: 72°F 22°C
Lo: 58°F 15°C
Sunrise 06:39 AM
Sunset 07:07 PM
Wind NW 16 mph26 km/h
Dew Point 59°F15°C
uv Index 4
Barometric Pressure 30 in1016 mb
POP 13% *
Humidity 74%
Wed, 16th
Alta IL Weather - Wednesday, Sep 16, 2026 - Partly Cloudy
Hi: 71°F 22°C
Lo: 53°F 12°C
Sunrise 06:40 AM
Sunset 07:05 PM
Wind NW 10 mph17 km/h
Dew Point 47°F8°C
uv Index 5
Barometric Pressure 30.21 in1023 mb
POP 2% *
Humidity 48%
Thu, 17th
Alta IL Weather - Thursday, Sep 17, 2026 - Sunny
Hi: 69°F 20°C
Lo: 48°F 9°C
Sunrise 06:41 AM
Sunset 07:04 PM
Wind NNW 7 mph12 km/h
Dew Point 44°F7°C
uv Index 5
Barometric Pressure 30.27 in1025 mb
POP 4% *
Humidity 47%
Fri, 18th
Alta IL Weather - Friday, Sep 18, 2026 - Sunny
Hi: 82°F 28°C
Lo: 53°F 12°C
Sunrise 06:42 AM
Sunset 07:02 PM
Wind SSW 12 mph19 km/h
Dew Point 59°F15°C
uv Index 7
Barometric Pressure 30.12 in1020 mb
POP 2% *
Humidity 52%
Sat, 19th
Alta IL Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 86°F 30°C
Lo: 70°F 21°C
Sunrise 06:43 AM
Sunset 07:00 PM
Wind SW 10 mph16 km/h
Dew Point 64°F18°C
uv Index 7
Barometric Pressure 29.97 in1015 mb
POP 3% *
Humidity 57%
Sun, 20th
Alta IL Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 70°F 21°C
Lo: 51°F 11°C
Sunrise 06:44 AM
Sunset 06:58 PM
Wind NE 16 mph25 km/h
Dew Point 49°F10°C
uv Index 5
Barometric Pressure 30.3 in1026 mb
POP 3% *
Humidity 59%
* POP = Probability of Precipitation. Data for 12:00 PM.