Live Weather & Forecast

Weather in Lewistown

Q: What is the current weather in Lewistown?

Current conditions in Lewistown: Overcast, temperature 17°C, humidity 99%.

Q: What is the best time to visit Lewistown?

The best time to visit Lewistown is typically June – September. Warm, dry summers — ideal for outdoor activities.

Q: What are the GPS coordinates used for the weather forecast in Lewistown?

The weather forecast for Lewistown uses coordinates 40.3931, -90.1548.

Illinois, United States · Real-time conditions & 3-day outlook

17^°C

Feels like 17°C

62°F / Feels 62°F

Overcast

Lewistown, Illinois

🌙 Nighttime

Updated: 2026-04-12 22:30

💧

Humidity

99%

💨

Wind

29.9 km/h WSW

🌬️

Wind Gust

46.3 km/h

🌡️

Pressure

1010 mb

👁️

Visibility

16 km

☀️

UV Index

0 (Low)

🌧️

Precipitation

2.28 mm

☁️

Cloud Cover

100%

💦

Dew Point

16.1°C

🌐

Wind Degree

239°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)

137.9 μg/m³

NO₂

3 μg/m³

O₃

100 μg/m³

SO₂

1.8 μg/m³

PM 2.5

4.3 μg/m³

PM 10

4.5 μg/m³

Weather Alerts 2

Met · Severe · Immediate

Flood Warning issued April 12 at 11:40AM CDT by NWS Lincoln IL

...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Fulton, Cass and Mason Counties. Illinois River at Beardstown affecting Brown, Morgan, Cass and Schuyler Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and minor flooding i...

Caution is urged when walking near riverbanks. Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov.

Effective: 2026-04-12T11:40:00-05:00 · Expires: 2026-04-13T03:45:00-05:00

Met · Severe · Immediate

Flood Warning issued April 12 at 11:40AM CDT by NWS Lincoln IL

Effective: 2026-04-12T11:40:00-05:00 · Expires: 2026-04-13T03:45:00-05:00

Today's Hourly Forecast

24-hour breakdown for Lewistown, Illinois

12 AM

14°

Clear

💧 79% 💨 21.6 km/h

1 AM

14°

Clear

💧 85% 💨 22.3 km/h

2 AM

14°

Clear

💧 89% 💨 22.3 km/h

3 AM

14°

Clear

💧 88% 💨 23 km/h

4 AM

14°

Clear

💧 87% 💨 22.7 km/h

5 AM

15°

Clear

💧 86% 💨 21.6 km/h

6 AM

15°

Clear

💧 85% 💨 22.3 km/h

7 AM

16°

Sunny

💧 86% 💨 21.6 km/h

8 AM

18°

Sunny

💧 77% 💨 22.7 km/h

9 AM

20°

Sunny

💧 66% 💨 25.2 km/h

10 AM

23°

Sunny

💧 59% 💨 27.7 km/h

11 AM

24°

Sunny

💧 54% 💨 32.4 km/h

12 PM

25°

Sunny

💧 51% 💨 34.9 km/h

1 PM

27°

Sunny

💧 50% 💨 29.2 km/h

2 PM

27°

Sunny

💧 48% 💨 32.8 km/h

3 PM

26°

Sunny

💧 46% 💨 32.8 km/h

4 PM

25°

Overcast

💧 45% 💨 33.1 km/h

5 PM

23°

Patchy rain nearby

💧 49% 💨 28.8 km/h 🌧️ 74%

6 PM

22°

Moderate rain at times

💧 77% 💨 35.6 km/h 🌧️ 100%

7 PM

20°

Patchy rain nearby

💧 69% 💨 26.6 km/h 🌧️ 100%

8 PM

19°

Patchy rain nearby

💧 71% 💨 26.3 km/h 🌧️ 100%

9 PM

18°

Patchy rain nearby

💧 84% 💨 26.3 km/h 🌧️ 100%

10 PM

17°

Overcast

💧 99% 💨 29.9 km/h 🌧️ 100%

11 PM

18°

Patchy rain nearby

💧 90% 💨 24.5 km/h 🌧️ 60%

3-Day Forecast

Daily overview for Lewistown, Illinois

Today

Patchy rain nearby

28° / 14°

🌧️ 79% chance of rain

💧 Avg. humidity: 71%

💨 Max wind: 35.6 km/h

🌧️ Total precip: 4.98 mm

☀️ UV Index: 1.5

🌅 Sunrise: 06:26 AM

🌇 Sunset: 07:37 PM

🌙 Waning Crescent

🌑 Moon: 33% lit

Mon, Apr 13

Patchy rain nearby

24° / 17°

🌧️ 77% chance of rain

💧 Avg. humidity: 87%

💨 Max wind: 26.3 km/h

🌧️ Total precip: 0.14 mm

☀️ UV Index: 1.1

🌅 Sunrise: 06:25 AM

🌇 Sunset: 07:38 PM

🌙 Waning Crescent

🌑 Moon: 23% lit

Tue, Apr 14

Patchy rain nearby

25° / 20°

🌧️ 79% chance of rain

💧 Avg. humidity: 87%

💨 Max wind: 30.6 km/h

🌧️ Total precip: 2.07 mm

☀️ UV Index: 1.2

🌅 Sunrise: 06:23 AM

🌇 Sunset: 07:39 PM

🌙 Waning Crescent

🌑 Moon: 15% lit

Best Time to Visit Lewistown

Plan your trip to Lewistown, United States around the most favorable weather conditions.

Peak Season

June – September

Warm, dry summers — ideal for outdoor activities.

Shoulder Season

April – May, October

Fewer crowds, moderate prices, mild weather.

Off Season

November – March

Cooler temperatures; some regions may experience rain or snow.

← Back to Lewistown 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Lewistown?

Current conditions in Lewistown: Overcast, temperature 17°C, humidity 99%.

What is the best time to visit Lewistown?

The best time to visit Lewistown is typically June – September. Warm, dry summers — ideal for outdoor activities.

What is the climate like in Lewistown?

Lewistown is located at approximately 40.4° latitude. It has a temperate climate with warm summers and cold winters.

Does it rain a lot in Lewistown?

The wettest period in Lewistown is typically during November – March. Cooler temperatures; some regions may experience rain or snow.

What should I pack for a trip to Lewistown?

For visits to Lewistown during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.

What country is Lewistown in?

Lewistown is located in United States, in the state of Illinois.

What are the public holidays in Lewistown in 2026?

View the 2026 public holidays for Lewistown on our Holidays page.

What are the GPS coordinates used for the weather forecast in Lewistown?

The weather forecast for Lewistown uses coordinates 40.3931, -90.1548.