Climate averages 1991–2020

Knoxville weather
in March.

A mild, wet month: the 8th warmest and the wettest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 15.0°C Daytime mean, March

Average low 4.2°C Night-time mean, March

Rainfall 123 mm 12 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

March is a mild month in Knoxville: daytime highs average 15.0°C and nights cool to about 4.2°C. By daytime temperature it is the 8th warmest of the 12 months.

Expect about 123 mm of rain on roughly 12 days, which makes March a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 56 min on an average March day.

The nearest other city in this atlas is Asheville (130 km away). In March its highs average 13.3°C, 1.7°C cooler than Knoxville, with 106 mm of rain.

Among the 498 cities listed in the United States, Knoxville ranks 267th of 498 for the warmest March highs and 463rd of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; Knoxville is 0.1°C warmer than that mean.

From March to April, average highs rise by 5.0°C to 20.0°C, and monthly rainfall falls from 123 mm to 109 mm.

The annual picture

March in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Knoxville climate table

1991–2020

Monthly climate averages for Knoxville, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	8.3°C-0.6°C	-0.6°C	111	10.7	10.010 h
February	10.6°C0.8°C	0.8°C	110	10.9	10.911 h
March, selected	15.0°C4.2°C	4.2°C	123	12.2	11.912 h
April	20.0°C8.8°C	8.8°C	109	10.9	13.113 h
May	24.1°C13.8°C	13.8°C	94	11.7	14.014 h
June	28.3°C18.3°C	18.3°C	93	13.2	14.615 h
July	29.8°C20.5°C	20.5°C	119	14.8	14.314 h
August	29.4°C19.9°C	19.9°C	86	11.4	13.514 h
September	26.7°C16.8°C	16.8°C	90	8.3	12.412 h
October	20.9°C10.5°C	10.5°C	74	7.7	11.311 h
November	14.6°C4.5°C	4.5°C	96	8.9	10.310 h
December	9.9°C1.2°C	1.2°C	117	10.6	9.810 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

March in nearby cities

Distance from Knoxville

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Knoxville) is explained once on the Knoxville year overview and on the Sources, method and limits page.