Today | Weather | Wednesday, March 18, 2026

Active Weather Warnings

Weather in Gainesville, Florida

06:43 AM

Now

36° F

Feels Like 30°

Precipitation 0 %

Wind 6 mph

Humidity 67 %

Today

Day 64°

Night 43°

Precipitation 1 %

Wind 9 mph

UV Index (0 - 11+) 7

Gainesville Weather Forecast Updated

28 minutes ago

Last updated on March 18, 2026 at 6:14 AM

Weather Forecast History

Last Year's Weather on This Day (March 18, 2025)

Day

77°

Night

39°

Wind

6 mph

UV Index

Precipitation

0 %

Air Quality in Gainesville

NOW

69 AQI

Moderate air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 1.32 µg/m³

PM₁₀ 2.09 µg/m³

O₃ 0.060 ppm

NO₂ 0.5 ppb

SO₂ 0.4 ppb

CO 0.13 ppm

NH₃ 0.8 µg/m³

NO 0 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

Air quality is acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 1.32 µg/m³

PM₁₀ – 2.09 µg/m³

O₃ – 117.95 µg/m³

NO₂ – 0.88 µg/m³

SO₂ – 0.99 µg/m³

CO – 145.17 µg/m³

NH₃ – 0.8 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Gainesville

Moderate Expected Likely

Freeze Warning

Freeze Warning issued March 17 at 8:13PM EDT until March 18 at 9:00AM EDT by NWS Jacksonville FL

Mar 18, 3:00 AM → Mar 18, 9:00 AM

WHAT: Sub-freezing temperatures as low as 30 expected.

WHERE: Bradford, Central Marion, Eastern Alachua, Gilchrist,
Western Alachua, and Western Marion Counties.

WHEN: From 3 AM to 9 AM EDT Wednesday.

IMPACTS: Appropriate action should be taken to ensure tender
vegetation and outdoor pets have adequate protection from the cold
temperatures. Young children, the elderly and the homeless are
especially vulnerable to the cold. Take measures to protect them.

+ Read More

Take steps now to protect tender plants from the cold.

Updated: Mar 18, 6:14 AM Source: NWS Alert

Minor Expected Likely

Frost Advisory

Frost Advisory issued March 17 at 7:58AM EDT until March 18 at 9:00AM EDT by NWS Jacksonville FL

Mar 18, 4:00 AM → Mar 18, 9:00 AM

WHAT: Temperatures as low as 31 will result in frost formation.

WHERE: Western Clay, Western Putnam, Bradford, Central Marion,
Eastern Alachua, Gilchrist, Western Alachua, and Western Marion
Counties.

WHEN: From 4 AM to 9 AM EDT Wednesday.

IMPACTS: Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.