Chattanooga endures about 27 more days above 90 °F each year.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Chattanooga | Metric | Signal Mountain |
|---|---|---|
| 195 days | Sunny daysclear or partly cloudy skies | 193 days |
| 51 in | Precipitationper year | 56 in |
| 126 days | Wet daysrain or snow per year | 135 days |
| 3 in | Snowfallper year | 4 in |
| 50 days | Hot daysabove 90 °F | 24 days |
| 60 days | Freezing nightsat or below 32 °F | 69 days |
| 74% | Humidityaverage relative | 74% |
| 61 °F | Average temperatureyear round | 59 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chattanooga high | 50 | 55 | 63 | 73 | 80 | 87 | 89 | 89 | 83 | 73 | 61 | 53 |
| Signal Mountain high | 48 | 52 | 60 | 70 | 77 | 84 | 87 | 86 | 81 | 70 | 59 | 50 |
| Chattanooga low | 32 | 35 | 41 | 49 | 58 | 67 | 70 | 69 | 63 | 51 | 40 | 35 |
| Signal Mountain low | 30 | 33 | 39 | 48 | 57 | 64 | 68 | 67 | 61 | 50 | 39 | 33 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chattanooga | 4.7 | 4.5 | 5.2 | 4.7 | 4.0 | 3.8 | 4.1 | 3.3 | 3.9 | 3.3 | 4.1 | 5.0 |
| Signal Mountain | 5.1 | 4.8 | 5.7 | 5.2 | 4.4 | 4.1 | 5.0 | 3.7 | 4.2 | 3.5 | 4.6 | 5.5 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chattanooga | 15 | 12 | 15 | 16 | 16 | 17 | 17 | 18 | 19 | 20 | 18 | 14 |
| Signal Mountain | 14 | 12 | 15 | 16 | 16 | 16 | 16 | 18 | 18 | 20 | 17 | 14 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Chattanooga vs another city
- Chattanooga vs Red Bank, TN
- Chattanooga vs East Ridge, TN
- Chattanooga vs Harrison, TN
- Chattanooga vs Middle Valley, TN
- Chattanooga vs Fort Oglethorpe, GA
- Chattanooga vs New York, NY
- Chattanooga vs Los Angeles, CA
- Chattanooga vs Chicago, IL
- Chattanooga vs Houston, TX
- Chattanooga vs Phoenix, AZ
- Chattanooga vs Philadelphia, PA
Signal Mountain vs another city
- Signal Mountain vs Red Bank, TN
- Signal Mountain vs Middle Valley, TN
- Signal Mountain vs Harrison, TN
- Signal Mountain vs East Ridge, TN
- Signal Mountain vs Soddy-Daisy, TN
- Signal Mountain vs New York, NY
- Signal Mountain vs Los Angeles, CA
- Signal Mountain vs Chicago, IL
- Signal Mountain vs Houston, TX
- Signal Mountain vs Phoenix, AZ
- Signal Mountain vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).