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Maryville, Tennessee climate
Cfa Humid subtropical
Maryville has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 88°F, while the coldest is January averaging around 30°F at night. Precipitation is fairly even year-round, totalling about 52 inches. Snow is occasional (5 inches of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsMaryville climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 53 | 61 | 71 | 79 | 86 | 88 | 88 | 83 | 72 | 60 | 51 |
| Avg temp (°F) | 39 | 43 | 51 | 60 | 68 | 75 | 79 | 78 | 72 | 60 | 49 | 42 |
| Avg low (°F) | 30 | 33 | 40 | 48 | 57 | 65 | 69 | 68 | 61 | 49 | 38 | 33 |
| Precipitation (in) | 4.8 | 4.8 | 4.9 | 4.7 | 4.1 | 4.2 | 5.3 | 3.6 | 3.5 | 2.8 | 4.2 | 5.0 |
| Snowfall (in) | 1.7 | 1.4 | 0.9 | — | — | — | — | — | — | — | 0.1 | 0.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 53 | 61 | 71 | 79 | 86 |
| Avg temp (°F) | 39 | 43 | 51 | 60 | 68 | 75 |
| Avg low (°F) | 30 | 33 | 40 | 48 | 57 | 65 |
| Precipitation (in) | 4.8 | 4.8 | 4.9 | 4.7 | 4.1 | 4.2 |
| Snowfall (in) | 1.7 | 1.4 | 0.9 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 88 | 83 | 72 | 60 | 51 |
| Avg temp (°F) | 79 | 78 | 72 | 60 | 49 | 42 |
| Avg low (°F) | 69 | 68 | 61 | 49 | 38 | 33 |
| Precipitation (in) | 5.3 | 3.6 | 3.5 | 2.8 | 4.2 | 5.0 |
| Snowfall (in) | — | — | — | — | 0.1 | 0.5 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 12 | 13 | 11 | 11 | 12 | 12 | 10 | 8 | 8 | 9 | 12 |
| Days with high ≥ 90°F (days) | — | — | — | — | 1 | 7 | 13 | 11 | 4 | 0.1 | — | — |
| Days with low ≤ 32°F (days) | 19 | 14 | 8 | 1.0 | — | — | — | — | — | 0.7 | 9 | 16 |
| Days with snowfall ≥ 1 in (days) | 0.7 | 0.5 | 0.1 | — | — | — | — | — | — | — | 0.0 | 0.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 12 | 13 | 11 | 11 | 12 |
| Days with high ≥ 90°F (days) | — | — | — | — | 1 | 7 |
| Days with low ≤ 32°F (days) | 19 | 14 | 8 | 1.0 | — | — |
| Days with snowfall ≥ 1 in (days) | 0.7 | 0.5 | 0.1 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 10 | 8 | 8 | 9 | 12 |
| Days with high ≥ 90°F (days) | 13 | 11 | 4 | 0.1 | — | — |
| Days with low ≤ 32°F (days) | — | — | — | 0.7 | 9 | 16 |
| Days with snowfall ≥ 1 in (days) | — | — | — | — | 0.0 | 0.2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 64 | 63 | 59 | 59 | 59 | 60 | 55 | 51 | 47 | 51 | 62 |
| Clear days (≤ 30% cloud) | 6 | 5 | 6 | 7 | 7 | 5 | 5 | 7 | 10 | 12 | 10 | 7 |
| Partly cloudy days (30–70%) | 11 | 8 | 9 | 10 | 11 | 13 | 13 | 14 | 10 | 9 | 8 | 9 |
| Cloudy days (≥ 70%) | 15 | 15 | 16 | 13 | 13 | 12 | 13 | 10 | 10 | 10 | 12 | 15 |
| Relative humidity (%) | 83 | 82 | 80 | 78 | 78 | 75 | 72 | 69 | 67 | 69 | 74 | 82 |
| Wind speed (mph) | 2.2 | 2.5 | 2.3 | 2.2 | 1.9 | 1.6 | 1.5 | 1.5 | 1.6 | 1.8 | 1.9 | 2.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 64 | 63 | 59 | 59 | 59 |
| Clear days (≤ 30% cloud) | 6 | 5 | 6 | 7 | 7 | 5 |
| Partly cloudy days (30–70%) | 11 | 8 | 9 | 10 | 11 | 13 |
| Cloudy days (≥ 70%) | 15 | 15 | 16 | 13 | 13 | 12 |
| Relative humidity (%) | 83 | 82 | 80 | 78 | 78 | 75 |
| Wind speed (mph) | 2.2 | 2.5 | 2.3 | 2.2 | 1.9 | 1.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 55 | 51 | 47 | 51 | 62 |
| Clear days (≤ 30% cloud) | 5 | 7 | 10 | 12 | 10 | 7 |
| Partly cloudy days (30–70%) | 13 | 14 | 10 | 9 | 8 | 9 |
| Cloudy days (≥ 70%) | 13 | 10 | 10 | 10 | 12 | 15 |
| Relative humidity (%) | 72 | 69 | 67 | 69 | 74 | 82 |
| Wind speed (mph) | 1.5 | 1.5 | 1.6 | 1.8 | 1.9 | 2.0 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Knoxville AP (NOAA GHCN station USW00013891), about 7 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.