Climate averages 1991–2020
Roswell weather
in July.
A hot, wet month: the warmest and the joint 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Roswell: daytime highs average 30.5°C and nights cool to about 21.5°C. By daytime temperature it is the warmest month of the year.
Expect about 104 mm of rain on roughly 15 days, which makes July a wet month (the joint 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 11 min on an average July day.
The nearest other city in this atlas is Sandy Springs (11 km away). In July its highs average 30.6°C, about as warm as Roswell, with 108 mm of rain.
Among the 498 cities listed in the United States, Roswell ranks joint 234th of 498 for the warmest July highs and joint 403rd of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Roswell is 0.3°C warmer than that mean.
From July to August, average highs fall by 0.6°C to 30.0°C, and monthly rainfall stays at 104 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Roswell climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 10.3°C1.4°C | 1.4°C | 116 | 10.4 | 10.210 h |
| February | 12.5°C2.9°C | 2.9°C | 117 | 10.1 | 10.911 h |
| March | 16.6°C6.3°C | 6.3°C | 120 | 10.3 | 12.012 h |
| April | 21.2°C10.4°C | 10.4°C | 102 | 9.6 | 13.013 h |
| May | 25.5°C15.2°C | 15.2°C | 85 | 9.8 | 13.914 h |
| June | 29.0°C19.5°C | 19.5°C | 104 | 13.6 | 14.414 h |
| July, selected | 30.5°C21.5°C | 21.5°C | 104 | 14.6 | 14.214 h |
| August | 30.0°C21.1°C | 21.1°C | 104 | 12.6 | 13.413 h |
| September | 27.1°C18.2°C | 18.2°C | 91 | 8.6 | 12.412 h |
| October | 21.8°C12.3°C | 12.3°C | 86 | 7.2 | 11.411 h |
| November | 16.0°C6.5°C | 6.5°C | 99 | 8.5 | 10.410 h |
| December | 11.5°C3.0°C | 3.0°C | 117 | 10.3 | 9.910 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
July in nearby cities
- Sandy Springs in JulyUnited States · 11 kmHigh 30.6°C · Low 21.5°C · 108 mm rain
- Johns Creek in JulyUnited States · 15 kmHigh 30.8°C · Low 21.8°C · 104 mm rain
- Atlanta in JulyUnited States · 31 kmHigh 30.7°C · Low 21.4°C · 106 mm rain
- South Fulton in JulyUnited States · 56 kmHigh 30.9°C · Low 22.0°C · 109 mm rain
- Athens, United States in JulyUnited States · 91 kmHigh 31.6°C · Low 22.0°C · 102 mm rain
- East Chattanooga in JulyUnited States · 142 kmHigh 30.7°C · Low 21.4°C · 105 mm rain
- Chattanooga in JulyUnited States · 143 kmHigh 30.9°C · Low 21.6°C · 105 mm rain
- Macon in JulyUnited States · 148 kmHigh 32.6°C · Low 22.8°C · 101 mm rain
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 limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Roswell) is explained once on the Roswell year overview and on the Sources, method and limits page.
Johns Creek lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.