Knoxville, TN 14-Day Forecast
Tennessee, United States 🇺🇸
92°
Sunny right now
Today: high 92°, low 69°
Updated 1 hour ago
Knoxville weather for the next 14 days
Wednesday, September 16
Sunny High 92° Low 72°Precipitation
3%
· 0.0 in
Max wind
8 mph
Humidity
58%
UV index
8 - High
Sunrise / sunset
07:19 AM / 07:42 PM
Thursday, September 17
Sunny High 93° Low 72°Precipitation
17%
· 0.0 in
Max wind
5 mph
Humidity
55%
UV index
8 - High
Sunrise / sunset
07:19 AM / 07:40 PM
Friday, September 18
Sunny High 94° Low 73°Precipitation
36%
· 0.03 in
Max wind
8 mph
Humidity
59%
UV index
8 - High
Sunrise / sunset
07:20 AM / 07:39 PM
Saturday, September 19
Overcast High 92° Low 71°Precipitation
80%
· 0.63 in
Max wind
16 mph
Humidity
75%
UV index
8 - High
Sunrise / sunset
07:21 AM / 07:37 PM
Sunday, September 20
Overcast High 80° Low 68°Precipitation
80%
· 0.11 in
Max wind
4 mph
Humidity
86%
UV index
6 - High
Sunrise / sunset
07:22 AM / 07:36 PM
Monday, September 21
Overcast High 76° Low 70°Precipitation
76%
· 0.1 in
Max wind
4 mph
Humidity
83%
UV index
5 - Moderate
Sunrise / sunset
07:22 AM / 07:34 PM
Tuesday, September 22
Patchy rain nearby High 87° Low 70°Precipitation
71%
· 0.12 in
Max wind
4 mph
Humidity
75%
UV index
7 - High
Sunrise / sunset
07:23 AM / 07:33 PM
Wednesday, September 23
Light rain shower High 87° Low 69°Precipitation
82%
· 0.35 in
Max wind
4 mph
Humidity
78%
UV index
8 - Very High
Sunrise / sunset
07:24 AM / 07:31 PM
Thursday, September 24
Sunny High 86° Low 70°Precipitation
57%
· 0.07 in
Max wind
6 mph
Humidity
78%
UV index
7 - High
Sunrise / sunset
07:25 AM / 07:30 PM
Friday, September 25
Light rain shower High 80° Low 66°Precipitation
80%
· 0.23 in
Max wind
9 mph
Humidity
85%
UV index
6 - High
Sunrise / sunset
07:26 AM / 07:28 PM
Saturday, September 26
Sunny High 75° Low 62°Precipitation
17%
· 0.0 in
Max wind
8 mph
Humidity
76%
UV index
6 - High
Sunrise / sunset
07:26 AM / 07:27 PM
Sunday, September 27
Sunny High 77° Low 60°Precipitation
5%
· 0.0 in
Max wind
9 mph
Humidity
68%
UV index
7 - High
Sunrise / sunset
07:27 AM / 07:25 PM
Monday, September 28
Overcast High 66° Low 58°Precipitation
18%
· 0.0 in
Max wind
9 mph
Humidity
72%
UV index
4 - Moderate
Sunrise / sunset
07:28 AM / 07:24 PM
Knoxville 14-day outlook: the story
The warmest day of Knoxville's 14-day outlook is Friday, September 18 with a high near 94°F (34°C); the coolest night comes Monday, September 28, dipping to 58°F (14°C). The trend points cooler: week two runs about 9°F below week one. Highs over the next two weeks average 88°F (31°C), about 5°F (3°C) above the typical September high of 83°F (28°C).
Precipitation is most likely on Saturday 19, Sunday 20, Monday 21, Tuesday 22 and beyond; the wettest day looks like Saturday, September 19 with about 0.63 in (16.0 mm) expected. For the weekend, expect Saturday 92°F (33°C) and overcast / Sunday 80°F (27°C) and overcast.
For typical conditions month by month, see the Knoxville climate & average temperatures guide.
Knoxville forecast questions
Will it rain in Knoxville this week?
The forecast currently shows meaningful precipitation chances on 7 of the next 14 days, peaking around Saturday, September 19.
What will be the warmest day in Knoxville over the next 14 days?
Friday, September 18, with a forecast high near 94°F (34°C).
How accurate is a 14-day forecast for Knoxville?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Knoxville by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 47° | 31° | 12 | 4.4 in | 6.2 h/day | 73% |
| February | 54° | 35° | 12 | 6.0 in | 6.4 h/day | 73% |
| March | 61° | 41° | 12 | 5.1 in | 8.1 h/day | 70% |
| April | 69° | 48° | 11 | 4.4 in | 9.8 h/day | 69% |
| May | 78° | 58° | 12 | 3.8 in | 10.8 h/day | 72% |
| June | 85° | 66° | 12 | 3.3 in | 11.9 h/day | 69% |
| July | 88° | 70° | 15 | 4.0 in | 11.7 h/day | 73% |
| August | 86° | 69° | 13 | 4.3 in | 11.1 h/day | 74% |
| September | 83° | 64° | 9 | 3.4 in | 10.1 h/day | 70% |
| October | 72° | 53° | 7 | 3.2 in | 9.0 h/day | 71% |
| November | 60° | 41° | 8 | 3.5 in | 7.5 h/day | 72% |
| December | 53° | 36° | 11 | 5.1 in | 5.8 h/day | 77% |
14-day forecasts nearby