Local weather forecast

Weather in Fairfield, IL

Updated 2026-08-11 10:15 local time · ZIP codes 62837

Now86°F

Sunny

High / Low98° / 75°

Rain chance5%

Wind13 mph

Weather alerts

Active alerts

Heat Advisory issued August 11 at 12:53AM CDT until August 13 at 8:00PM CDT by NWS Paducah KY

* WHAT...Maximum daily heat index values up to near 110 degrees. * WHERE...Portions of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. * WHEN...Until 8 PM CDT /9 PM EDT/ Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Daily heat index values will remain elevated near or above 100 degrees through next weekend.

Safety instructions

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Hourly

Next hours

Now

86°5% rain

11 AM

94°4% rain

12 PM

96°3% rain

1 PM

98°2% rain

2 PM

98°2% rain

3 PM

98°2% rain

4 PM

98°1% rain

5 PM

96°1% rain

6 PM

93°2% rain

7 PM

89°3% rain

8 PM

85°4% rain

9 PM

82°5% rain

Forecast

3-day weather forecast

Today2026-08-11

98° 75°Sunny

Rain 5%Gust 15 mph

Tomorrow2026-08-12

98° 75°Sunny

Rain 5%Gust 12 mph

Thursday2026-08-13

98° 70°Sunny

Rain 43%Gust 11 mph

Conditions

Weather details

Feels like93°F

Humidity67%

Pressure29.99 inHg

Visibility6 mi

Wind13 mph SW

Wind gusts16 mph

Precipitation0.00 in

UV index4

Daylight

Sunrise, sunset and moon

Sunrise06:04 AM

Sunset07:52 PM

Moonrise04:08 AM

Moon phaseNew Moon

Practical guide

Weather insights for today

Umbrella not essential

Rain chance stays relatively low over the next 12 hours (up to 5%).

Choose light, breathable clothing

It feels like 93°F with winds near 13 mph.

Best window: 8 PM

85°F, 4% rain chance and 9 mph wind.

Driving conditions look generally normal

Visibility is around 6 mi; gusts may reach 25 mph.

Running conditions are less comfortable

Current temperature is 86°F, wind 13 mph, rain chance up to 5%.

Moderate UV protection recommended

UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.

Fairfield weather today

Sunny and 86°F in Fairfield, IL. Today's high is 98°F with a 5% rain chance. Winds are around 13 mph with gusts near 16 mph. Relative humidity is 67%, pressure is 29.99 inHg, and visibility is about 6 miles.

Tonight and tomorrow in Fairfield

Sunrise is at 06:04 AM and sunset is at 07:52 PM. Tomorrow's forecast calls for Sunny with a high near 98°F and a low near 75°F. The maximum rain chance is 5%.

Nearby

Weather near Fairfield

Barnhill, IL~6 mi away Geff, IL~7 mi away Golden Gate, IL~9 mi away Sims, IL~10 mi away Ellery, IL~11 mi away Burnt Prairie, IL~11 mi away Mill Shoals, IL~11 mi away Cisne, IL~11 mi away

Illinois

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