GA
Alpharetta and Roswell have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Alpharetta | Metric | Roswell |
|---|---|---|
| 203 days | Sunny daysclear or partly cloudy skies | 203 days |
| 49 in | Precipitationper year | 49 in |
| 126 days | Wet daysrain or snow per year | 126 days |
| 2 in | Snowfallper year | 2 in |
| 42 days | Hot daysabove 90 °F | 39 days |
| 57 days | Freezing nightsat or below 32 °F | 56 days |
| 72% | Humidityaverage relative | 72% |
| 61 °F | Average temperatureyear round | 61 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alpharetta high | 52 | 56 | 64 | 72 | 80 | 86 | 89 | 88 | 83 | 73 | 63 | 54 |
| Roswell high | 52 | 56 | 64 | 72 | 79 | 85 | 88 | 87 | 82 | 73 | 63 | 55 |
| Alpharetta low | 32 | 35 | 41 | 48 | 57 | 65 | 69 | 68 | 62 | 50 | 40 | 35 |
| Roswell low | 32 | 35 | 41 | 48 | 58 | 65 | 69 | 68 | 62 | 50 | 40 | 35 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alpharetta | 4.6 | 4.6 | 4.7 | 4.0 | 3.3 | 4.1 | 4.1 | 4.1 | 3.6 | 3.4 | 3.9 | 4.6 |
| Roswell | 4.6 | 4.6 | 4.7 | 4.0 | 3.3 | 4.1 | 4.1 | 4.1 | 3.6 | 3.4 | 3.9 | 4.6 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alpharetta | 15 | 14 | 16 | 17 | 18 | 17 | 17 | 17 | 19 | 20 | 18 | 15 |
| Roswell | 15 | 14 | 16 | 17 | 18 | 17 | 17 | 17 | 19 | 20 | 18 | 15 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Alpharetta vs another city
- Alpharetta vs Johns Creek, GA
- Alpharetta vs Milton, GA
- Alpharetta vs Peachtree Corners, GA
- Alpharetta vs Duluth, GA
- Alpharetta vs Dunwoody, GA
- Alpharetta vs New York, NY
- Alpharetta vs Los Angeles, CA
- Alpharetta vs Chicago, IL
- Alpharetta vs Houston, TX
- Alpharetta vs Phoenix, AZ
- Alpharetta vs Philadelphia, PA
Roswell vs another city
- Roswell vs Dunwoody, GA
- Roswell vs Sandy Springs, GA
- Roswell vs Milton, GA
- Roswell vs Johns Creek, GA
- Roswell vs Peachtree Corners, GA
- Roswell vs New York, NY
- Roswell vs Los Angeles, CA
- Roswell vs Chicago, IL
- Roswell vs Houston, TX
- Roswell vs Phoenix, AZ
- Roswell 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).